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How to play and record sounds

, 12 Mar 2001
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A simple application that shows how to play and record sounds under Windows


This is a simple application that shows you how to play and record sound under windows.
It uses the old multimedia API. A better solution may be to use DirectSound.

Quick Guide to the Code

Start with the two functions in CFisterDlg called OnPlay and OnRecord. Follow them down to the depth you need to use the classes.

Short description

CSoundIn is a wrapper class that will let you retreive sound from the soundcard. The main functions are Start() and Stop()

CSoundOut is a wrapper class that will let you play sound on the soundcard. The main functions are Start() and Stop()

CSoundFile is a wrapper class of a single wave file, it can either be a file reader or a file writer object. See the constructor.

CSoundBase is a very small class that encapsulates the wave format.

CBuffer is a very small class that encapsulates a simple one dimentional buffer.

The project has a number of different callback functions:

  • One callback function makes the Play button change it's label to stop when it has finished playing the file. CDialogDlg enherits CPipe and overloads a function that CPipe can call when it has finished playing the wave file.
  • Another callback function make it possible for CSoundIn to callback to CPipe when it has filled the input buffer. Thus CPipe can give CSoundIn a new buffer to fill.
  • A clone of the above principle is also used in CSoundOut, which enables it to callback to the owner when it is finished playing the sound in a given buffer.

Problems that I encountered

I have spent almost 2 days debugging the following stupid problem. When CSoundIn and CSoundOut inherit from CSoundBase and CWinThread the order in which they are listed must be as shown below. If not, the callback functions, which are started by the WinThread message handler, will not be able to access the member variables of the CSoundIn object.

class CSoundIn : public CWinThread, public CSoundBase

During these two days of fustration I also tried to implement the callback as regular callback functions called by the device driver. This is possible using ::waveInOpen(...). But since this callback function is not allowed to call any of the ::waveInXXX(...) functions it is not of much use.


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About the Author

Thomas Holme
Web Developer
Denmark Denmark
No Biography provided

Comments and Discussions

GeneralRe: unable to record the data from microphone PinmemberFigu.Lin10-Feb-09 17:30 
GeneralHelp me with default recording device!!! PinmemberHung In26-Jul-06 17:01 
GeneralHi PinmemberLuckyBoydtt13-Jul-06 9:05 
GeneralRe: Hi PinmemberAndy Byron22-Dec-06 4:47 
GeneralRe: Hi PinmemberLuckyBoydtt22-Dec-06 5:05 
Generalt Pinmemberangshu1201198416-Jun-06 0:54 
GeneralHelp me! Pinmembertrananh19-Jan-06 16:03 
GeneralError Message: Still 3 buffers in waveIn queue Pinmembersrettig15-Nov-05 12:01 
I sometimes get a error message "Still 3 buffers in waveIn queue" when I stop the recording. It seems like the MM_WIM_DATA messages to clean up the buffers are not sent at all. I'm not sure where the problem is. Can someone help?
I am not using the original classes, but I have changed them, that they send a copy of the sound data to the main window.
QuestionCan i do this in C# PinmemberKumar Muthu29-Oct-05 1:26 
GeneralMore help in rectifying errors Pinmemberarmimex200028-Oct-05 14:46 
AnswerRe: More help in rectifying errors PinmemberGokcer Gokdal10-Nov-05 12:34 
GeneralAudio and Video PinmemberKisi00719-Oct-05 8:33 
GeneralSave the Recorded Sound to a .Wav File, PinmemberREU7-Oct-05 9:43 
GeneralRe: Save the Recorded Sound to a .Wav File, Pinmemberyasar7910-Jan-06 2:08 
Generalselecting two input sources Pinmemberrajeev_geom7-Oct-05 2:03 
GeneralVery nice design PinmemberGokcer Gokdal24-Aug-05 14:13 
QuestionHow can I record playback sound when Only Microphone is selected in Window Record Control Pinmemberjackshelingzhang6-Jun-05 3:31 
Generalhelp in rectifying the errors Pinmembernagulmeera4-Dec-04 1:49 
GeneralRe: help in rectifying the errors PinmemberJordan Walters29-Sep-05 3:10 
GeneralRecord and Play the Sound in two different machine. PinsussJosep Ignatius23-Nov-04 0:56 
Generalhelp me,plz Pinsusschaitanya123215-Jul-04 23:14 
GeneralA simple way to play sound... PinsussMark Sparrow24-May-04 19:42 
GeneralRe: A simple way to play sound... PinmemberDavidCrow8-Jun-04 4:21 
GeneralRe: A simple way to play sound... ? Pinmembermohsen nourian3-Jul-04 23:05 
GeneralRe: A simple way to play sound... ? Pinsusswavefan4-Jul-04 0:33 

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