Thread: waveOutOpen() problems

  1. #1
    Registered User
    Join Date
    Dec 2004

    waveOutOpen() problems

    Hey Everyone,

    I was just wondering if you could help me out. I am working with the Waveform Audio Interface, waveOutOpen() keeps returning the value 32 "the process cannot access the file because it is being used by another process".

    The file is a .wav file that I have downloaded for specific use with this code, and so I can't understand how another process could be using it (yes I have read the old post from Incognito in March).

    I was wondering if anybody else had experienced any similar difficulties? Any suggestions would be greatly appreciated

    Thankyou and happy new year!

  2. #2
    Registered /usr
    Join Date
    Aug 2001
    Newport, South Wales, UK
    I'm reasonably certain that your error message with that function doesn't make sense. waveOutOpen(...) doesn't take a file handle or name at any point, given that it provides a "simple" interface to a sound card. Its parameters are:-
    MMRESULT waveOutOpen(
    LPHWAVEOUT     phwo,	//Pointer to where the device handle is returned
    UINT_PTR       uDeviceID,	// ID of the device to open (WAVE_MAPPER unless you have a reason for being specific)
    LPWAVEFORMATEX pwfx,	// Pointer to WAVEFORMATEX structure describing the output buffer format
    DWORD_PTR      dwCallback,	// Pointer to callback function or window handle
    DWORD_PTR      dwCallbackInstance,	// User-defined data to pass to callback
    DWORD          fdwOpen	// Flags
    Perhaps you have a different problem? Could you post some code?

  3. #3
    Registered User
    Join Date
    Dec 2004
    I don't have access to my code just now... I gave up and left uni an hour ago

    My code is a slimmed down version of the stuff microsoft have available for download in their tutorial .

    The same error gets raised when I substitute my "wav of choice" for their test.wav in the Wave.cs. I have got a feeling that the error has got something to do with the different properties of the two wav files. test.wav being stereo and mine being mono etc, but I don't know how I would go about checking that. My wav is hrtbeat1.wav.

    If you don't fancy trawling through all of that I will post my code up tomorrow when I get back into uni.


  4. #4
    Registered User
    Join Date
    Dec 2004
    Just to let you know I worked out the problem eventually... my wav file was in an unsupported format. Thanks for the suggestion.

    Happy New Year!!

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