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Posted 2 Jan 2001

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.


This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here


About the Author

Thomas Holme
Web Developer
Denmark Denmark
No Biography provided

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Comments and Discussions

GeneralSave the Recorded Sound to a .Wav File, Pin
REU7-Oct-05 9:43
memberREU7-Oct-05 9:43 

Hello everybody I just started with this thing of programing, a few months ago,,

I want to know if its possible to save the recorded sound into a .Wav file,, also I I recorded many times can I save many .Wav

othe question that I have is ???

which Variable or where can I find the Final Final with the Sound data,
I mean if I need to send all the Audio data trough a socket
where can I find the block or the file that contains the Audio Data,, and where can I find the lenght in bytes of the captured file.

Can I use Windows sockets to control the Start capture and Stop capture functions, and then send the file through a socket,and when I receive the file in the other side,, how can I save the Audio Data to a .Wav file,,

or is it possible to save the Audio Data to .Wav file and then send it through the socket ???

its really urgent these questions, if somebody can help me,,

I write my email

Im trying to find solutions and this code is so amazing , simple and amazing to capture the sound that I need,
thanx everybody



GeneralRe: Save the Recorded Sound to a .Wav File, Pin
yasar7910-Jan-06 2:08
memberyasar7910-Jan-06 2:08 

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