Free C++ lib (Win32) to record microphone

Question

Hey there,

is there any recommendation for a library (c++, Win32, open source) to get the sound from a microphone?

Thanks

Answer 1

I found some code at CodeProject (standard warning: Please review every bit of code you take from CodeProject carefully! It's useful, but I often find horrifying bugs in samples I get there!). That should give you a good clue as to the APIs and how to start using them. From there you can Google for references and related topics.

Answer 2

Try having a look at OpenAL[1] it might be overkill, but should be able to record from microphone as you wanted. There exists some pretty good articles about it on Gamedev.net[2] although I'm afraid none of them tells you how to record from a microphone. You should however be able to find the answer for that in the documentation. :) good luck,

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[1] http://connect.creativelabs.com/openal/default.aspx

[2] http://www.gamedev.net/reference/articles/article2008.asp

Answer 3

PortAudio - portable cross-platform Audio API

PortAudio provides a very simple API for recording and/or playing sound using a simple callback function.

Answer 4

If you don't need cross platform, DirectShow works well. Although it is not open source, I believe you can distribute open source projects that require the DirectShow libraries.

Answer 5

You don't say that you need cross platform support, if cross platform support isn't necessary, I'd use the wave APIs or DirectSound - both are fairly straighforward to use.

Answer 6

I have used the mci functions to record in the past. Sorry, this doesn't show making sure the microphone is selected as a recording input, but once its selected manually, it will stay unless somebody changes it. This was in a dialog, so thats what the windows handle came from.

#define ALIAS "mci_alias"

char mci_command[100];
char ReturnString[300];
int mci_error;

// open the device
sprintf(mci_command, "open new type waveaudio alias %s", ALIAS);
mci_err = mciSendString(mci_command, ReturnString, sizeof(ReturnString), m_hWnd);

// set the time format  
sprintf(mci_command,"set %s time format ms", ALIAS);    // just set time format
mci_err = mciSendString(mci_command, ReturnString, sizeof(ReturnString), m_hWnd);

// start the record. specify notifications with a MM_MCINOTIFY message)
sprintf(mci_command, "record %s notify", ALIAS);
mci_err = mciSendString(mci_command, ReturnString, sizeof(ReturnString), m_hWnd);

// wait for a stop button, or an error to occur

sprintf(mci_command,"stop %s", ALIAS);
mci_err = mciSendString(mci_command, ReturnString, sizeof(ReturnString), m_hWnd);

// save the file
sprintf(mci_command, "save %s %s", ALIAS, m_filename);
mci_err = mciSendString(mci_command, ReturnString, sizeof(ReturnString), m_hWnd);

sprintf(mci_command,"stop %s", ALIAS);
mci_err = mciSendString(mci_command, ReturnString, sizeof(ReturnString), m_hWnd);


// close the device
sprintf(mci_command,"close %s", ALIAS);
mci_err = mciSendString(mci_command, ReturnString, sizeof(ReturnString), m_hWnd);