nambisn s DigiScpe (Electrnic Stethscpe Versin 1.14) USER MANUAL *The actual prduct may nt be the same as displayed in the phtgraphs.
Specificatins: Listening Mde: slw, medium, high nambisn s DigiScpe (Electrnic Stethscpe Versin 1.14) Frequency Respnse: 20 20,000 Hz (Lw, medium & high frequency filters) Battery: 9v Tube Length: 2 mtr Vlume Cntrl: 15 90 Db PC interface: RS232 Serial Features: Prtable and Cnvenient t Operate Based n Latest Piez Sensr Technlgy Pwerful Electrnics Amplify the Sund up t a Maximum f 200 Times Sund Mdel: Heart, Lung, And ther intra-bdy sunds. Frequency Respnse: 20hz - 20,000hz Real-Time Recrd, Edit And Display The Heart Rate Accmmdates infant, pediatric, and adult patients Integrated with regular stethscpe, ECG wavefrm display Weight: 490g Sensitivity: Autmatic *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 2
ELECTRICAL CHARACTERISTICS OF THE CIRCUIT Operating Supply Vltage : 4 t 12V DC Quiescent Current : 4 t 8mA Output Pwer : 500mW t 700mW (Vs = 6V, RL = 8 Ohm, THD = 10%) Vltage Gain : 26dB t 46dB Bandwidth : 15 Hz t 2000 Hz Ttal Harmnic Distrtin : 0.2% (Vs = 6V, RL = 8 Ohm, Put = 125mW, f = 1 khz) Pwer Supply Rejectin Rati : 50dB Frequency Respnse: Distrtin Vs Frequency: *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 3
Distrtin Vs Output Pwer: Nte 1: Abslute Maximum Ratings indicate limits beynd which damage t the device may ccur. Operating Ratings indicate cnditins fr which the device is functinal, but d nt guarantee specific perfrmance limits. Electrical Characteristics state DC and AC electrical specificatins under particular test cnditins which guarantee specific perfrmance limits. This assumes that the device is within the Operating Ratings. Specificatins are nt guaranteed fr parameters where n limit is given, hwever, the typical value is a gd indicatin f device perfrmance. Nte 2: Fr peratin in ambient temperatures abve 25 C, the device must be derated based n a 150 C maximum junctin temperature and thermal resistance f 107 C/W junctin t ambient. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 4
Get Set G: 1. Make cnnectins 5 2. Line ut cnnectins (Speaker/Cmputer/iPd/PDA/Headphne) 7 3. Pwer supply (The device needs 5.0 Vlts) 7 4. Recmmended Hardware 8 5. Recmmended Sftware 9 6. Audi Driver/Sftware settings 11 7. General Maintenance and Cleaning 11 8. Service and Warranty 13 9. Recrding Heart Lung sunds using sftware 14 1. Make cnnectins: First f all make sure that the DigiScpe is free f physical damages, if nt, please reprt yur supplier. Then, cnnect the pwer supply as illustrated. Make line ut cnnectins. Switch On the instrument by pressing dwn the switch n the frnt panel & lk fr Red light at the tp panel which when glwing indicates the instrument is ready fr use. FRONT VIEW *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 5
CONNECTIONS & FILTER: Main Unit Frequency Filter High/lw Earphne in Steth line in Charger in *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 6
Pwer supply: When yu see the red light in the frnt panel is dim r nt glwing. Insert the jack f the 9v charger int the Sthet in (n the frnt panel) & charge it fr 4-6 hurs. We recmmend yu t g thrugh this vide fr mre infrmatin:http://yutu.be/pg4iachq6e4 LINE OUT CONNECTIONS (fr Speaker/Cmputer/iPd/PDA/Headphne): BACK VIEW REPLACE BATTERY (In case the battery is nt recharging) Cmputer ut Cmputer ut Open the back panel with screw driver, Install a 9.0 Vlt rechargeable battery. 9v Rechargeable *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 7
SPECIFICATIONS HOST PC (HARDWARE) REQUIREMENTS: Operating System: MS Windws 98 r higher Prcessr: Pentium II - 300 MHz r higher RAM: 64 MB minimum HDD: 300 MB fr prgram and disk cache Sund Card with input jack Perfrmance Specificatins: Frequency Respnse: 20-1000 Hz File Type:.wav,.mp3,.gg (gg vrbis),.aup (Audacity prject file) frmat Third Party Requirements (fr IP transmissin): Internet, IR r bluetth enabled cmputer. Sund Quality: High fidelity sund. Nise: Backgrund nise immunity. Data Transmissin: Real-time & Stre/Frward IP; all telecm and vide cnferencing at greater than 9.6Kbps. User Interface: Remte & hst units cntrlled by PC GUI applet. Data Strage: Archiving t a PC in multiple frmats. Recrd Length: limit depends upn yur cmputer system. Playback: at different r nrmal speed OTHER REQUIREMENT: SPEAKER HEADPHONE 1000 Watt Speaker System with WOOFER recmmended Recmmended Headphnes - Speaker WITH Sub Wfer System 1000 Watts : PMPO Magnetically Shielded Cntrl : Vlume, Bass & Treble S/N Rati :>80db Clsed-Type Headphnes with Lng Strke Diaphragm Large 40mm Driver Unit with 360kJ/m³ High Pwer Nedymium Magnet fr Outstanding Sund Quality Accessries: 1 Wfer + 2 Speakers *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 8
T bring dwn the cst f ut Digital Stethscpe & t prvide varius ptins t the user we d nt prvide audi equipments. Hwever, we recmmend the fllwing equipment based n ur year lng research n sund quality enhancement. http://www.gshing.c.uk/headphnes/philips_sbchs900/#prices http://www.nin.c.uk/headphnes/rland_rh_50.html http://www.wiki.c.uk/guide/headphnes-earphnes-philips-review-5968-5136-page1-srt0.html Specificatins Cmpany: SONY Recmmended Highly Recmmended Highly Recmmended General MDR-XD200 MDR-XD400 MDR-XD300 Sensitivity 102dB/mW 106dB/mW 104dB/mW Pwer Handling Capacity 1.5W 3.0W 1.5W Impedance 70hms 24hms 70hms Frequency Respnse 10-22,000Hz 5-30,000Hz 8-25,000Hz DigiScpe Sftware requirement (Recmmended): Fr Windws http://audacity.surcefrge.net/dwnlad/windws Fr Mac http://www.apple.cm/dwnlads/macsx/audi/audacity.html AUDACITY pwered features: Start using Recrd and Playback sunds. Display and visualize sunds fr yur ease & diagnsis. Manipulate sunds easily, using yur cmputer system. Save results easily in sund files r grup sets f sunds in Prject files. See yur Sunds Visualise heart sund, lung sund & ther intrabdy sund Wavefrms. Visualise Spectrgrams (frequency spectrum) f heart sunds and lung sunds. Visualise Wavefrm and Spectrgrams tgether t crrelate timing and frequency. Catch Sunds Recrd frm yur DigiScpe Digital Stethscpe sunds directly t a Cmputer system. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 9
Imprt recrdings frm yur pen drive, ipd, mp3 player r imprt recrdings frm email attachments r dwnladed frm the Internet. Play and Exprt Sunds Play back sunds n a PC/ Speaker via headphnes. Edit and Exprt sunds t new files fr lectures, emails, pdcasts, websites, r burn CDs. Mdify Sunds Amplify Sunds. Filter recrded sunds fr specific sund characteristics. yu can slw dwn recrdings s that details such as splits are mre audible. Use files fr Electrnic Medical Recrds Label Sund tracks t identify specific events such as S3, S4, murmurs, rhnchi etc. Auscultatin Research fr Advanced Users Investigate heart sunds and lung sunds fr new diagnstic methds. Award winning Audacity Open Surce platfrm. The sftware surce cde is freely available fr any researchers r sftware develpers wh wish t expand the pwer f auscultatin with new analysis sftware. After installing Audacity, yur system will shw Heart sund wavefrm as belw: *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 10
Sftware setting fr simultaneus listening f Speaker & Headphne: G t yur Audi settings > Mixer > Enable multi-streaming playback (as shwn in the belw image.) Different drivers/sftware prvides different interface. Please cntact yur vendr fr exact path. General Maintenance and Cleaning D nt immerse the DigiScpe in any liquid. If the DigiScpe is inadvertently immersed in liquid, d NOT Pwer ON the unit. Cmpletely dry ut the inner spaces befre trying t use the DigiScpe again. Cntact diagnzit@gmail.cm fr assistance. D nt sterilize the DigiScpe using any sterilizatin prcess. Wipe the DigiScpe with alchl swabs r a sft clth mistened with alchl r water. D nt use abrasive cleaning agents, and d nt allw fluids t enter the device. Avid extreme heat, cld r humidity fr either strage r use f this device. Remve battery if device is nt t be used fr a perid f mnths. See Tips and Trubleshting fr mre infrmatin. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 11
As electrnic equipment DigiScpe als needs care. Therefre, handle it with care. If yu have heavy usage f stethscpe then wear and tear may cause the wire t break frm the stethscpe. We advise yu t secure yur chest piece, the way it is shwn in the belw picture. Als make sure t read the user manual carefully befre use. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 12
Service and Warranty: Fr warranty please read the Warranty terms and cnditin given n the website. Fr maintenance, repair, service and cntact infrmatin, visit the DigiScpe website at DigiScpe http://digiscpe.diagnzit.cm & www.diagnzit.cm and check the Supprt page. Befre shipping the prduct fr repair, please cntact supprt@diagnzit.cm first. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 13
Recrding Heart Sunds and Lung Sunds Our Stethscpe prvide fr the recrding and playback f sunds, using the Audi I/O jack. Using yur stethscpe and an external recrder r playback device, yu can: - Recrd while listening t a patient. - Recrd vice anntatins (dictatins) by simply speaking int the stethscpe. - Playback recrdings, using the stethscpe headphnes fr high-quality audi. See safety precautins fr Recrding. Never recrd frm patients using a recrding device that is cnnected t main pwer, r t any ther equipment. Use nly battery-pwered flating devices. Fr playback with n patient cntact, any equipment may be used. Quick Instructins Recrding and playback can be dne very easily with ur stethscpe. Simply cnnect the stethscpe t the Line Input f the recrding device, listen t the patient, and recrd. T listen t the recrding, turn ff the stethscpe, plug the stethscpe int the Headphne Output f the playback device, and listen. Cmpatible Devices and Listening t recrdings The fllwing devices may be used fr Recrding: - Apple ipd Vide with recrding attachments. (Other ipds d nt prvide recrding capability) - Mp3 players with built-in recrding feature. - Prtable digital recrders. - Ntebk cmputer, perating n battery pwer. Listening t recrdings is best dne using the stethscpe in headphne/playback mde. The reasn is that bdy sunds, especially heart sunds, cntain significant lw frequency cntent. DigiScpe stethscpe are designed t reprduce these lw frequencies accurately. Mst heapdhnes cannt reprduce bdy sunds adequately. T listen t recrdings, perfrm the fllwing steps: 1. Turn ff yur stethscpe, r set the stethscpe vlume t 0. 2. Cnect the stethscpe t the Headphne Output f the recrding r playback device. 3. Play back the recrdings. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 14
Tlbars Cntrl Tlbar (tls, play buttn, etc.) Thinklabs Tlbar (Imprting and editing heart and lung sunds) Mixer Tlbar (vlume cntrls, input device) Meter Tlbar (Input and Output level meters) Edit Tlbar (editing shrtcuts) Cntrl Tlbar Audi Cntrl Buttns Skip t Start - mves the cursr t time 0. If yu press Play at this pint, yur prject will play frm the beginning. Play - starts playing audi at the cursr psitin. If sme audi is selected, nly the selectin is played. Lp - if yu hld dwn the Shift key, the Play buttn changes t a Lp buttn, which lets yu keep playing the selectin ver and ver again. Recrd - starts recrding audi at the prject sample rate (the sample rate in the lwer-left crner f the windw). The new track will begin at the current cursr psitin, s click the "Skip t Start" buttn first if yu want the track t begin at time 0. Pause - temprarily stps playback r recrding until yu press pause again. Stp - stps recrding r playing. Yu must d this befre making changes, edting, saving r exprting. Skip t End - mves the cursr t the end f the last track. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 15
Thinklabs Tlbar The Thinklabs Tlbar prvides quick access t special features that are useful fr visualizing, manipulating and analyzing heart and lung sunds. Sme f these functins are als accessible via the Thinklabs Menu. Thinklabs Special Functin Buttns Imprt Audi - allws yu t imprt sunds recrdings int the current Prject/Patient. If yu have recrded ne r mre sund(s) frm a patient, use Imprt t pen the sund file. Cntinue t add additinal files that belng t a given patient, s that the Prject cntains all the relevant recrdings made during ne exam. Each file is imprted int its wn separate Track. Nte that Stere recrdings will imprt with bth Left and Right. Use the Track Menu t Split Tracks, then Delete the unwanted track, and then select Mn in the Track Menu. This will cnvert stere t Mn and remve a duplicate track. Amplify - (a Track r part f a Track must be selected t activate this functin) - allws yu t scale a track t be luder and sfter. It is recmmended that yu simply Amplify t the maximum level. This can be dne autmatically by clicking Amplify and then OK, and the Amplify functin will adjust t maximize withut clipping any peaks. If yu wish t cntrl the amplificatin level, enter a value int the db windw. Nte that a signal dubles in amplitude fr every +6dB and halves fr every -6dB amplitude change. Nte that yu can select a small segment f a wavefrm, such as the sunds between peaks, and amplify them significantly t enhance murmurs. Filter - (a track r part f a track must be selected t activate this functin) - allws yu t filter a track r part f a track. There are varius pre-set filters fr manipulating heart sunds and lung sunds, r yu can adjust the Equalizer t filter sund t yur wn specificatins. Fr instance, yu may find that a sharp high-pass filter (allw high, blck lw frequency) enables yu t listen t a particular valve sunds very clearly. Merely place yur cursr ver the Equalizatin Curves, and draw the desired respnse t create a custm filter. Rate Change - (a track r part f a track must be selected t activate this functin) - changes the temp (speed) f the audi withut changing the pitch. This will change the length f the selectin. This is useful fr expanding heart sunds s that heart sund splits, S3 r S4 and rapid events such as gallps can be slwed dwn and spread ut. Display Spectrgrams On/Off - allws yu t view tracks with the Spectrgram belw the Waavefrm, r the Wavefrm withut Spectrgram. The Spectrgram shws frequence cntent by shwing Frequency alng the vertical axis and clr as the Intensity f a given frequency. Fr instance, if yu see a bright regin twards the lwer part f a spectrgram, it suggests that there is a high intensity f lw frequency energy at that mment in time. This is mst useful fr seeing murmurs r additinal heart sunds such as S3 in a wavefrm which may nt be visible n the time-dmain plt f the wavefrm. Nte that if yu have a slw cmputer r limited memry, it is best t manipulate tracks (zm, pan, etc.) withut the Spectrgram, and the click Display t shw the Spectrgram nce yu've zmed in. Otherwise yu may find that zming r panning acrss a track is very slw. Mixer Tlbar The Mixer Tlbar has three cntrls, used t set the vlume levels f yur audi device and chse the input surce. The leftmst slider cntrls the playback vlume, the ther slider cntrls the recrding vlume, and the cntrl n the right lets yu chse the input surce (such as "Micrphne", "Line In", "Audi CD", etc.). Use the Recrd Level Meter t set the crrect level. T recrd frm yur stethscpe, cnnect the stethscpe t the Mic r Line Input, and *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 16
select the crrect Input surce fr the stethscpe. Then adjust the Vlume Cntrl n the stethscpe, and the Input Vlume level n the slider. Generally it is best t set the stethscpe Vlume Cntrl t Maximum (10). Hwever, check the recrding fr clipping f the signal which will prduce distrtin and annying sund artifacts. Ideally, set the level t peak at abut 50-75% f maximum. Once yu have made yur recrdings, use Amplify n the Thinklabs Tlbar t maximize signal levels. Changing the Speaker cntrls has n effect n the audi data in yur prject - in ther wrds it desn't matter what the utput vlume level is when yu Exprt r Save a prject - the end result is the same. Edit Tlbar All f the buttns n this tlbar perfrm actins - and with a cuple f exceptins, they're all just shrtcuts f existing menu items t save yu time. Hlding the muse ver a tl will shw a "tltip" in case yu frget which ne is which. Cut Cpy Paste Trim away the audi utside the selectin Silence the selected audi Und Red (repeat last cmmand). Zm In Zm Out Fit selectin in windw - zms until the selectin just fits inside the windw. Fit prject in windw - zms until all f the audi just fits inside the windw. Meter Tlbar The Meter Tlbar is used fr mnitring the input and utput audi levels. Typically it is used t make sure that the ludest vlume is as lud as pssible (fr maximum fidelity) withut clipping r distrting it. The utput (playback) meter is the green ne, n the left in the picture abve, and the input (recrding) meter is in red, n the right. The meters prvide a visual indicatin f the current audi levels ging in and ut f audacity. If yu flat the Meter Tlbar by dragging it ut f the tlbar, yu can resize it and even rient it vertically. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 17
Nrmally the meters are nly active when yu are playing r recrding audi. Hwever, yu can als mnitr input when yu're nt recrding - t d this, either select "Mnitr Input" frm the input meter's pp-up menu, r else just click n the input meter. If yu have a micrphne r ther input surce attached, yu will be able t watch the level f the audi befre yu start recrding. Each meter shws several characteristics f the audi level at nce: The right hand end f the meter crrespnds t the pint at which the audi will be clipped, and the left hand end is silence Fr stere, the tp bar shws the left channel, and the bttm bar shws the right channel. The brightest part f the bar shws the average audi level (related t the ludness) and the darker part f the bar shws the peak audi level. The peak-hld line t the right f this shws the maximum audi level achieved in the last 3 secnds. Finally, the clipping indicatrs n the far right f each meter will light up if clipping is detected (meaning that the audi was t lud and will sund distrted). If clipping is detected when yu are recrding, yu shuld stp, lwer the vlume f yur input surce, and start recrding again frm the start. If the utput meter clips then yu need t make sme r all f yur tracks quieter using the track gain cntrl. If the level f the input (recrding) surce is t high, yu can try t lwer the input level using the Mixer Tlbar, but if this desn't wrk, yu shuld try t lwer the vlume f the external input surce (e.g., yur micrphne, cassette player, r recrd player). It is pssible, especially if yu have an lder, slwer cmputer, that the Meter Tlbar may interfere with Audacity's ability t recrd r play audi with the highest quality, because yur cmputer is s busy redrawing the meters that it desn't have time t prcess enugh audi. In this is the case fr yu, yu can disable the Meter Tlbar in the Interface tab f the Preferences dialg. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 18
Tracks Audi Track Label Track Track Layut Tracks shw the actual sund wavefrms r spectrgrams. Getting t knw hw t wrk with tracks in central t using Thinklabs Phncardigraphy fr wrking with heart sunds r lung sunds. The basic anatmy f a Track is shwn abve: Track Menu - Prvides ptins fr manipulating each Track. See Track Pp-Dwn Menu. Click the Playback Select buttn t select which Track t Play. Playback Select will be bright cyan fr the selected playback Track. Wavefrm Track - Shws the actual heart sund r lung sund time dmain wavefrm. It is pssible t scrll t any psitin alng the time axis, r zm in r ut t lk clsely at ne sectin r larger prtins f a wavefrm. Nte that the clr scheme can be changed n the Thinklabs Menu t shw a bright blue wavefrm n a dark backgrund (Dark Clr Scheme) r a dark wavefrm n a white backgrund (Light Clr Scheme). Label Track - The Label Track prvides a place t anntate events alng the time axis such as S1, S2, S3, murmurs, etc. Label Tracks can be added r deleted as required using Prject > Add Label Track t add a Label Track, and X t delete the Label Track. Nte that if a span f time is selected first, the whle span can be labelled. This allws yu t select an entire duratin f a murmur, fr example, and then label it. If yu then click n the Label, it will immediately highlight the entire span. Track Name - Every Track can be uniquely named. When Imprting a Sund File, it will take the name f the file. If yu Recrd a new recrding, yu must give it a name via the Track Pp-dwn Menu. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 19
Track Cntrl Area - The Track Cntrl Area prvides infrmatin abut the Track(s) and allws fr cntrl f editing and playback. At the tp f the Area are the details f the file yu are wrking with. It is either Stere r Mn. The Sampling Rate is als shwn. High Quality audi requires 44100Hz Sampling Rate. Yu can use a lwer sampling rate, but if yu wish t recrd CD's, use 44100Hz. Belw the Stere/Mn is the data frmat. Abut Stere r Mn Tracks - Usually, yu d nt need Stere fr heart sunds r lung sunds recrded frm the stethspe. If yu used an ipd fr recrding, ne channel will prbably be blank and yu nly need the Left Channel. If yu have Imprted a Stere Track, use the Track Pp-Dwn Menu t first Split Stere t Mn, and then delete the blank track using the X in the tp left crner. Cntrlling and Editing Tracks Tracks r parts f tracks can be selected fr Playback r Editing as illustrated here: Playback - Yu must select which track yu wuld like t hear when the PLAY buttn is clicked. Yu d this by clicing "Playback Select" (turning it bright Cyan/turquise) in the Track Cntrl area as shwn belw. Vlume - The Slider just belw "Playback Select" cntrls the Vlume f the track playback. There are als ther places t cntrl vlume (a) Mixer Tlbar, and (b) In Windws n the Audi Cntrls. (If sunds are t quiet, cnsider using the Amplify functin n the Thinklabs Tlbar t Amplify a track.) Editng a Whle Track - An entire track, r part f a track, can be edited (Amplify, Filter, Temp Change,.deleted, cpied, etc.). T select the entire track fr editing, Click anywhere in the Track Cntrl area, as shwn belw. Ntice that the COLOR f the Track Cntrl area is GREY fr a track that is selected fr editing, and the prtin f the track itself that will be edited als turns grey. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 20
Editing Part f a Track - T select a prtin f a Track t edit, DRAG yur muse ACROSS the prtin yu wish t edit. It will turn Grey as shwn belw. If yu wish t select a new prtin, simply red the drag peratin: *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 21
Wavefrm and Spectrum View The Dispay view can shw wavefrm, spectrum, r bth. The abve image shws bth wavefrm and spectrum. It is generally faster t lcate sectins f interest using wavefrm nly view, and then switching t wavefrm + spectrgram when a regin f interest is in view. Turning Spectrgram n f ff can be dne using the Thinklabs Tlbar Display buttn, r the Tlbar Pulldwn Menu.It is als pssiblt t shw Spectrgram nly. Spectrum View Spectrum Only view is selected n the Track Pp-Dwn Menu (see belw) and shws the Spectrgram nly. Nte that reslutin f the Spectrgram can be adjusted via Edit > Preferences > Spectrgram. Using a higher reslutin requires a faster cmputer. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 22
Track Pp-Dwn Menu Name... - lets yu change the name f the track. Imprting a Track will name the Track t the file name. Recrding will nt name a Track - yu must name it using this Menu selectin. Mve Track Up - exchange places with the track abve this ne. Mve Track Dwn - exchange places with the track belw this ne. Wavefrm - sets the display t Wavefrm - this is the default way f visualizing audi. Spectrum - display the track as a spectrgram, shwing the amunt f energy in different frequency bands. Shing the Spectrum requires a fast cmputer. It is better t zm in t the view yu want and then shw spectrum, rather than panning and zming with Spectrum n. Wavefrm and Spectrum - display bth wavefrm and spectrgram. Can achieve this n ALL tracks at nce by using the Display buttn n the Thinklabs Tlbar. See ntice abve n Spectrum and cmputer speed. Split Stere T Mn - when yu Imprt a Track, if it is a Stere recrding, bth Channels/Tracks will shw (left and right). Fr phncardigraphy use, the secnd track is redundant r blank. Once yu Imprt a track, Click Split Stere t Mn, and it will split Left and Right. Then DELETE the redundant track (X in the tp left crner f the track). Label Track Label Tracks can be used t anntate an audi Track. They can be used t label S1, S2, S3, S4, murmurs, and even save selected prtins f a sund. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 23
Label Tracks are generated autmatically when yu Imprt a sund file. Yu can then delete the Label Track by clicking X in the left crner f the Label Track. T create a new Label Track, select New Label Track frm the Prject Menu. Alternatively, simply click r select where yu wuld like t place a label, and chse Add Label at Selectin frm the Prject Menu, and a Label Track will be created autmatically if ne desn't already exist. T add a new label, click r select where yu want the new label t appear, then select Add Label at Selectin frm the Prject Menu, then type the name f the label, and finally press Enter r click utside f the label. In additin, yu can use the Add Label at Playback Psitin cmmand frm the Prject Menu if yu want t add a label at a certain place while yu are listening. By default, this cmmand has a shrtcut f Cntrl+M. T edit the name f a label, click anywhere in it. Zm in first if there are t many labels crwded tgether and yu are unable t click n the ne yu want. When a label is selected fr editing, it lks like the S2 label belw: When editing the name f a label, yu are limited t using just the backspace key fr editing. There is currently n way t mve the insertin pint t append a letter t the beginning f a label. Once a label is selected, yu can mve t the next label by pressing Tab, and mve t the previus label by pressing Shift-Tab. T delete a label r multiple labels, select the area cntaining the label flags yu wish t delete, and chse Silence frm the Edit Menu. Alternatively yu can delete an individual label by clicking n it and pressing Backspace until yu have deleted all f the characters in the label, then pressing Enter. T mve labels, use the nrmal editing cmmands like Cut, Cpy, Paste, Delete, and Silence. Yu can save a selectin in a label. When yu create a new label, the left selectin edge determines the psitin f the label's flag. Hwever, the right selectin edge is als stred in the label, and when yu click n it, the full riginal selectin will be restred. If yu wish t apply this selectin t nly a subset f the tracks, shift-click in the label area t the left f each track's wavefrm t change whether each track is part f the selectin r nt. Exprting and Imprting label tracks Label Tracks are saved when yu save an Audacity Prject, s if yu just want t cntinue using the labels alng with the same file, just save a prject. But yu can als exprt the labels t a simple text file, and imprt them. This allws yu t save infrmatin abut the lcatins f events in an audi file fr use in anther prgram, and als prvides a way t mass-edit the labels if necessary. T exprt a Label Track, chse Exprt Labels... frm the File Menu. The exprted file will cntain ne line per label, starting with the time ffset in secnds, then a tab, and then the name f the label, fr example: 1.217995 Bass intr 3.921073 Guitar enters 7.584454 Drums enter 11.070002 Chrus T imprt a Label Track, chse Imprt Labels... frm the File Menu. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 24
Menu Bar Track Pp-Dwn Menu File Menu Edit Menu View Menu Prject Menu Help Menu Thinklabs Menu File Menu New - creates a new empty windw Open... - pens an audi file r an Audacity prject in a new windw (unless the current windw is empty). T add audi files t an existing prject windw, use ne f the Imprt cmmands in the Prject menu. Clse - clses the current windw, asking yu if yu want t save changes. On Windws and Unix, clsing the last windw will quit Audacity, unless yu mdify this behavir in the Interface Preferences. Save Prject - saves everything in the windw int an Audacity-specific frmat s that yu can save and quickly cntinue yur wrk later. An Audacity prject cnsists f a prject file, ending in ".aup", and a prject data flder, ending in "_data". Fr example, if yu name yur prject "Cmpsitin", then Audacity will create a file called "Cmpsitin.aup" and a flder called Cmpsitin_data. Audacity prject files are nt meant t be shared with ther prgrams - use ne f the Exprt cmmands (belw) when yu are finished editing a file. Save Prject As... - same as Save Prject (abve), but lets yu save a prject as a new name. Recent Files... - brings up a list f files yu have recently pened in audacity t be re-pened quickly. Exprt As WAV... - exprts all f the audi in yur prject as a WAV file, an industry-standard frmat fr uncmpressed audi. Yu can change the standard file frmat used fr exprting frm Audacity by pening the File Frmat Preferences. Nte that exprting will autmatically mix and resample if yu have mre than ne track, r varying sample rates. See als File Frmats. Exprt Selectin As WAV... - same as abve, but nly exprts the current selectin. Exprt as MP3... - exprts all f the audi as an MP3 file. MP3 files are cmpressed and therefre take up much less disk space, but they lse sme audi quality. Anther cmpressed alternative is Ogg Vrbis (belw). Yu can set the quality f MP3 cmpressin in the File Frmat Preferences. See alsmp3 Exprting. Exprt Selectin As MP3... - same as abve, but nly exprts the current selectin. Exprt Labels... - if yu have a Label Track in yur prject, this lets yu exprt the labels as a text file. Yu can imprt labels in the same text frmat using the "Imprt Labels..." cmmand in the Prject Menu. Exprt Multiple... - lets yu split yur prject int multiple files all in ne step. Yu can either split them vertically (ne new file per track), r hrizntally (using labels in a Label Track t indicate the breaks between exprted files. Page Setup - cnfigure hw Audacity will print ut the track wavefrms using the Print ptin, and what printer t use. Print - Print ut the main windw view frm audacity shwing the tracks and wavefrms. Exit (Quit) - clses all windws and exits Audacity, prmpting yu t save any unsaved changes first. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 25
Edit Menu The Edit Menu prvides functins fr editing wavefrms. In rder t activate mst functins, yu need t select part r all f a wavefrm: The dark grey regin is selected and any edit cmmand will perate nly n that wavefrm segment. T select a regin, place yur muse at the strarting pint and drag t the end pint. T select an entire wavefrm, Click Ctrl-A. Und - This will und the last editing peratin yu perfrmed t yur prject. Audacity supprts full unlimited und - meaning yu can und every editing peratin back t when yu pened the windw. Red - This will red any editing peratins that were just undne. After yu perfrm a new editing peratin, yu can n lnger red the peratins that were undne. Cut - Remves the selected audi data and places it n the clipbard. Only ne "thing" can be n the clipbard at a time, but it may cntain multiple tracks. Cpy - Cpies the selected audi data t the clipbard withut remving it frm the prject. Paste - Inserts whatever is n the clipbard at the psitin f the selectin r cursr in the prject, replacing whatever audi data is currently selected, if any. Trim - Remves everything t the left and right f the selectin. Delete - Remves the audi data that is currently selected withut cpying it t the clipbard. Silence - Erases the audi data currently selected, replacing it with silence instead f remving it. Split - Mves the selected regin int its wn track r tracks, replacing the affected prtin f the riginal track with silence. See the figure belw: Duplicate - Makes a cpy f all r part f a track r set f tracks int new tracks. See the figure belw: *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 26
Select... > All - Selects all f the audi in all f the tracks in the prject. Select... > Start t Cursr - Selects frm the beginning f the selected tracks t the cursr psitin. Select... > Cursr t End - Selects frm the cursr psitin t the end f the selected tracks. Find Zer Crssings - Mdifies the selectin slightly s that bth the left and right edge f the selectin appear n a psitive-slpe zer crssing. This makes it easier t cut and paste audi withut resulting in an audible clicking sund. Selectin Save - Remembers the current selectin (r cursr psitin), allwing yu t restre it later. Selectin Restre - Restres the cursr psitin t the last psitin saved by "Selectin Save". Mve Cursr... > t Track Start - Mves the cursr t the start f the current track. Mve Cursr... > t Track End - Mve the cursr t the end f the currently selected track. Mve Cursr... > t Selectin Start - Mves the cursr t the start f the current selectin. Mve Cursr... > t Selectin End - Mves the cursr t the end f the current selectin. Snap-T... > Snap On - Enable Snap-T mde. When Snap-T mde is enabled, the selectin will be cnstrained t the nearest interval n the time scale, by default the nearest secnd. S if yu click and drag frm 4.2 secnds t 9.8 secnds, it will result in a selectin frm 4 secnds t 10 secnds, exactly. Yu can change the units that are snapped t using the "Set Selectin Frmat" ptin in the View Menu. Snap-T... > Snap Off - Turns Snap-T mde ff letting yu select arbitrary ranges f time Preferences... - pens the Preferences dialg. View Menu Zm In - Zms in n the hrizntal axis f the audi, displaying mre detail abut less time. Yu can als use the zm tl t zm in n a particular part f the windw. Zm Nrmal - Zms t the default view, which displays abut ne inch per secnd. Zm Out - Zms ut, displaying less detail abut mre time. Fit in Windw - Zms ut until the entire prject just fits in the windw. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 27
Fit Vertically - Resizes all f the tracks vertically s they all fit inside f the windw (if pssible). Zm t Selectin - Zms in r ut s that the selectin fills the windw. Histry... - Brings up the histry windw. It shws all the actins yu have perfrmed during the current sessin, including imprting. The right-hand clumn shws the amunt f hard disk space yur peratins used. Yu can jump back and frth between editing steps quite easily by simply clicking n the entries in the windw, the same as selecting Und r Red many times in a rw. Yu can als discard Und histry t save disk space. The histry windw can be kept pen while yu wrk. Prject Menu Imprt Audi... - This cmmand is used t imprt audi frm a standard audi frmat int yur prject. Use this cmmand if yu already have a cuple f tracks and yu want t add anther track t the same prject, maybe t mix them tgether. Yu cannt use this ptin t imprt Audacity Prjects. The nly way t cmbine tw Audacity Prjects is t pen them in separate windws, then cpy and paste the tracks. Imprt Labels... - This cmmand takes a text file which cntains time cdes and labels, and turns them int a Label Track. Imprt Raw Data... - This menu cmmand allws yu t pen a file in virtually any uncmpressed frmat. When yu select the file, Audacity will analyze it and try t guess its frmat. It will guess crrectly abut 90% f the time, s yu can try just pressing "OK" and listening t the result. If it is nt crrect, hwever, yu can use the ptins in the dialg t try sme ther pssible encdings. At the beginning f yur imprted track(s), yu may ntice a little bit f nise. This is prbably the file's header, which Audacity was nt able t parse. Just zm in and select the nise with the Selectin Tl, and then chse Delete frm the Edit Menu. Edit ID3 Tags... - Opens a dialg allwing yu t edit the ID3 tags assciated with a prject, fr MP3 exprting New Label Track - This creates a new Label Track, which can be very useful fr textual anntatin. Remve Tracks - This cmmand remves the selected track r tracks frm the prject. Even if nly part f a track is selected, the entire track is remved. Yu can als delete a track by clicking the X in its upper-left crner. T cut ut nly part f the audi in a track, use Delete r Silence. Add Label at Selectin - This menu item lets yu create a new label at the current selectin. Yu can title the label by typing with the keybard and then hitting "Enter" when yu're dne. Add Label at Playback Psitin - This menu item lets yu create a new label at the current lcatin where yu are playing r recrding. D this if yu want t mark a certain passage while yu're listening t it. Yu can title the label by typing with the keybard and then hitting "Enter" r "Return" when yu're dne. Only available whilst audacity is playing. Help Menu Thinklabs Phncardigraphy Help - Takes yu t www.thinklabsmedical.cm Help infrmatin n using Thinklabs Phncardigraphy Sftware.. Audacity Help - The riginal Audacity Help infrmatin. This can be useful t see sme f the tls that exist in standard Audacity. In sme cases, the standard Audacity prvides features that have been remved frm Thinklabs Phncardigraphy. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 28
Abut Thinklabs - takes yu t www.thinklabsmedical.cm. Abut Audacity - displays the versin number and credits. If yu cmpiled Audacity yurself, check here t verify which ptinal mdules were successfully cmpiled in. Thinklabs Menu The items in this menu nly wrk when yu have audi selected. Audacity des nt have any real-time effects; yu must select the audi, apply the effect, and then listen t the results. Mst effects have a Preview buttn. Clicking n this buttn plays up t three secnds f audi, allwing yu t hear what it will sund like after the effect is applied. This is useful fr fine-tuning the effect parameters. Amplify - changes the vlume f the selected audi. If yu click the "Allw clipping" checkbx, it will let yu amplify s much that the audi ends up beynd the range f the wavefrm, and is clipped (distrted). The default value when yu pen the effect is t amplifiy s that the ludest part f the selectin is as lud as pssible withut distrtin. Change Temp - changes the temp (speed) f the audi withut changing the pitch. This will change the length f the selectin. This is useful fr expanding sunds s that heart sund splits and ther rapid events can be slwed dwn. Nte that yu must select part r whle track t activate this functin. Equalizatin - Bst r reduce arbitrary frequencies. Yu can select ne f a number f different curves designed t equalize the sund f sme ppular recrd manufacturers, r draw yur wn curve. FFT Filter - similar t Equalizatin, lets yu enhance r reduce arbitrary frequencies. The curve here uses a linear scale fr frequency. Nrmalize - allws yu t crrect fr DC ffset (a vertical displacement f the track) and/r amplify such that the maximum amplitude is a fixed amunt, -3 db. It's useful t nrmalize all f yur tracks befre mixing. If yu have a lt f tracks, yu may then need t use the track gain sliders t turn sme dwn. High Pass Filter - allws yu t filter ut lwer frequencies and keep the higher frequencies. This is useful fr filtering ut heart sunds when yu are nly interested in lung sunds, enhancing valve clicks, etc. This is a quick filter t use, hwever we recmmend using the Filter Buttn n the Thinklabs Tlbar fr better cntrl f the filtering parameters. Lw Pass Filter - allws yu t filter ut higher frequencies and keep the lwer frequencies. This is useful fr filtering ut hiss r white nise, ambient nise, r breath sunds, and enhance heart sunds. This is a quick filter t use, hwever we recmmend using Filter Buttn n the Audacity Tlbar fr better cntrl f the filtering parameters. Plt Spectrum - T use this feature, first select a regin f audi frm a single track, then select "Plt Spectrum". It pens up a windw that displays the Pwer Spectrum f the audi ver that regin, calculated using the Fast Furier Transfrm. The graph represents hw much energy is in each frequency. As yu mve the muse ver the display, it shws yu the nearest peak frequency. This windw can als display ther cmmn functins that are calculated using the Fast Furier Transfrm, including three versins f the Autcrrelatin functin. The Enhanced Autcrrelatin functin is very gd at identifying the pitch f a nte. Imprt Audi - allws yu t add a sund file t the Prject (Patient). If yu have recrded ne r mre heart r lung sunds, and yu wish t wrk n them, r add them t ther sund tracks yu already have pen, use Imprt t imprt the sund file int a new audi track. When yu use Imprt, a Label Track will als be added t facilitate anntatin f the imprted sund.. New Label Track - allws yu t add a new Label Track t a prject. This is t prvide anntatin.. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 29
Light/Dark Clr Scheme - There are tw clr schemes - dark backgrund and light wavefrms (Dark Clr Scheme), r light backgrund and dark wavefrms (Light Clr Schemes). The Dark Clr Scheme is intended fr viewing n a cmputer screen, and the Light Clr Scheme is useful fr cpying the screen t paste int reprts that might be printed. By using a Light Clr Scheme fr printed reprts, yu save tner ink, and create prints that are easier t read. Yu may als find the Light Clr Scheme t be mre effective during Pwerpint presentatins r ther teaching using a prjectr. Hw t Cpy the Display - quick instructins n cpying the display t the clip-bard s that yu can paste the screen image int a dcument r reprt. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 30
Other Preferences Sund File Frmats Envelpe Editing MP3 Exprting General Public License Preferences Audi I/O Playback Device - Use this cntrl t select the device that will be used fr playback / audi utput. This is usually nly applicable if yur cmputer has mre than ne sund card. Recrding Device - Select the devce that will be used fr recrding / audi input. Nte that many devices have multiplesurces such as Micrphne and Line in - t select the input surce yu will need t use the Mixer Tlbar. Fr finer cntrl ver audi I/O, pen yur system's Sund cntrl panel r the cntrl panel sftware that came with yur sund card. Recrding Channels - Use this t select the number f channels t recrd simultaneusly. Select 1 fr mn and 2 fr stere. Audacity will supprt recrding mre simultaneus channels, but nte that mst sund cards nly supprt stere, and even if yur sund card supprts mre than 2 inputs, yu need a fast cmputer and a large, fast hard disk t recrd many channels fr a lng time. Mn recrding is nt the same n all cmputers r sund cards. Smetimes recrding mn nly recrds the left channel, and smetimes it mixes the left and right channels. Play ther tracks while recrding new ne - When this bx is checked, Audacity will play existing tracks when yu press recrd - therwise it simply recrds the new track withut letting yu hear what yu've already recrded. Yu can use this ptin t recrd harmnies with yurself r add a vicever. Yu may ntice that when yu play the tw tracks yu recrded tgether, they aren't synchrnized. This is unavidable t a certain extent, althugh Audacity tries t minimize it. T fix it, yu will need t grab the Time Shift tl and slide ne f the tracks arund until it sunds right. Hardware Playthrugh (Mac Only) - plays the audi yu are recrding straight back ut t yur headphnes r speakers s yu can hear it. This ptin is dne in harware, s it is fast and desn't cnsume resurces. Hwever, it is nly pssibly if input and utput are n the same sund device. PC users can d the same thing in their vlume cntrl settings, turning up the relevant audi input. Sftware Playthrugh - Des the same thing as hardware playthrugh, but in sftware. This means that the audi yu hear may be slightly delayed relative t the input, and activating this ptin will use sme mre system resurces. Hwever, it wrks n all systems, even if yu are recrding frm ne device and playing back thrugh anther. Quality Default Sample Rate - This cntrls the sample rate f new prjects. T change the sample rate f an existing prject, use the cntrl in the lwer-left crner f the main prject windw. Default Sample Frmat - This cntrls the default frmat used t stre audi samples. 16-bit takes up the least space and is equivalent t audi CD quality. 32-bit flat takes up twice as much space but is much mre flexible. If yu have a fast cmputer and enugh disk space, yu shuld always use 32-bit flat samples while editing, and then exprt yur final mix as a 16-bit WAV file (the default). *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 31
Real-time sample rate cnverter - Audacity has mre than ne sample rate cnverter that's used when yu have a track that's nt the same sample rate as the prject. This ptin lets yu set the cnverter used during real-time playback, which can be different than the ne yu use during Exprt r mixing. High-quality sample rate cnverter - Audacity has mre than ne sample rate cnverter that's used when yu have a track that's nt the same sample rate as the prject. This ptin lets yu set the cnverter used during Exprt and mixing, which can be different than the ne yu use fr real-time playback. Real-time dither - Dithering is used when cnverting high-quality samples with a lt f dynamic range, t CD-quality samples, with less dynamic range. A small amunt f dithering can make the audi sund a little bit better, but it can als slw dwn prcessing a little bit. This ptin lets yu set the dithering used fr real-time playback. High-quality dither - Dithering is used when cnverting high-quality samples with a lt f dynamic range, t CD-quality samples, with less dynamic range. A small amunt f dithering can make the audi sund a little bit better, but it can als slw dwn prcessing a little bit. This ptin lets yu set the dithering used during Exprt and mixing. File Frmats When imprting uncmpressed audi files int Audacity Make a cpy f the file befre editing (safer) - Selecting this means that Audacity will take lnger t imprt files, but it will always have its wn cpy f any audi yu are using in a prject. Yu can mve, change, r thrw away yur files immediately after yu pen r imprt them int Audacity. Read directly frm the riginal file (faster) - Selecting this means that Audacity depends n yur riginal audi files being there, and nly stres changes yu make t these files. If yu mve, change, r thrw away ne f the files yu imprted int Audacity, yur prject may becme unusable. Hwever, because Audacity desn't need t make cpies f everything first, it can imprt files in much less time. Uncmpressed Exprt Frmat - This lets yu select the frmat that Audacity will use when yu exprt uncmpressed files. 11 cmmn ptins are displayed in the list, but yu can als select "Other" and chse a nnstandard file frmat fr Audacity t exprt. Ogg Exprt Setup - Use this cntrl t set the quality f Ogg Vrbis exprting. Ogg Vrbis is a cmpressed audi frmat similar t MP3, but free f patents and licensing fees. A nrmal quality Ogg Vrbis file is encded with a quality setting f "5". Nte that unlike MP3 encding, Ogg Vrbis des nt let yu set a bitrate, because sme audi clips are easier t cmpress than thers. Increasing the quality will always increase the file size, hwever. Exprt Setup - Use these cntrls t lcate yur MP3 encder and set the quality f MP3 encding. Higher quality files take up mre space, s yu will need t find the level f quality yu feel is the best cmprmise. Fr mre infrmatin, see Exprting MP3 Files.Spectrgrams Yu can view any audi track as a Spectrgram instead f a Wavefrm by selecting ne f the Spectral views frm the Track Pp-Dwn Menu. This dialg lets yu adjust sme f the settings fr these spectrgrams. FFT Size - The size f the Fast Furier Transfrm (FFT) affects hw much vertical (frequency) detail yu see. Larger FFT sizes give yu mre bass reslutin and less tempral (timing) reslutin, and they are slwer. Grayscale - Select this fr gray spectrgrams instead f clred nes. Maximum Frequency - Set this value anywhere frm a cuple f hundred hertz t half the sample rate (i.e. 22050 Hz if the sample rate is 44100 Hz). Fr sme applicatins, such as speech recgnitin r pitch extractin, very high frequencies are nt imprtant (visually), s this allws yu t hide *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 32
these and nly fcus n the nes yu care abut. Directries Use this panel t set the lcatin f Audacity's temprary directry (flder). Audacity uses this directry whenever yu wrk n a prject that yu haven't saved as an Audacity Prject (AUP file) yet. Yu have t restart Audacity (clse and pen it again) fr changes t the temprary directry t take effect. Interface Autscrll while playing - Scrlls the windw fr yu while playing, s that the playback cursr is always in the windw. This can hurt playback perfrmance n slwer cmputers. Always allw pausing - Nrmally the Pause buttn is nly enabled while yu are playing r recrding. Checking this bx allws yu t set the pause buttn anytime, which allws yu t press Recrd and nt have the recrding start until yu unpause it. Smetimes starting a paused recrding can be faster than starting t recrd in the first place. Update spectrgram while playing - Because spectrgrams are slwer t draw, nrmally they are nt drawn during playback, but this ptin lets yu draw the spectrgrams anyway. Enable Edit Tlbar - Sets whether r nt yu want t display the Edit Tlbar, which has sme cmmn shrtcuts fr editing cmmands. Enable Mixer Tlbar - Sets whether r nt yu want t display the Mixer Tlbar, which lets yu set the vlume levels and input surce. Enable Meter Tlbar - Sets whether r nt yu want t display the Meter Tlbar fr setting audi recrding and playback levels. Quit Audacity upn clsing last windw - By default n Windws and X-Windws (but nt Mac OS), Audacity quits when yu clse the last prject windw. If yu uncheck this bx, Audacity will pen a new blank dcument instead f quitting. T quit Audacity in this case, yu must specifically select Exit (r Quit) frm the File menu. Enable dragging f left and right selectin edges - Nrmally, when yu mve the muse ver the left and right edge f a selectin, the cursr changes t a left r right pinter, and yu can adjust that edge f the selectin independently. If yu dn't like this feature, uncheck this bx, and then clicking will always create a new selectin (unless yu hld dwn Shift t extend an existing selectin). Language - sets the language used by Audacity. Language files are named "audacity.m" and are fund in the "Languages" flder n Windws and Mac OS X, r in /usr/share/lcale r /usr/lcal/share/lcale n mst Unix systems. Audacity will detect new languages the next time yu start it. Keybard This panel lets yu change keybard shrtcuts. All f the cmmands that appear in Audacity menus appear n the left, alng with a few ther buttns that can get keybard shrtcuts. T change a cmmand, first click n the cmmand yu want t change. Then type the new keybard shrtcut n yur keybard. Verify that the crrect shrtcut appears in the bx belw. If it's what yu want, press the Set buttn. Or t get rid f a keybard shrtcut, press Clear. T reset t Audacity's defaults, press the Defaults buttn. This will get rid f any changes yu have made. If yu have custmized yur keybard layut and want t share it with smene else, yu can press Save... and save yur cmplete keybard layut as an XML file that yu can share. T lad an existing layut, press the Lad... buttn and lcate the XML file. *The actual prduct may nt be the same as displayed in the phtgraphs. Page N. 33