Using the Waveform Audio Interface (Windows CE 5.0)

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This section describes the Waveform Audio API interface. An application uses this interface to gain the greatest control possible over audio I/O devices. Specifically, this section discusses the following capabilities of the Waveform Audio API:

• Querying and opening waveform audio I/O devices
• Allocating audio data blocks
• Playing waveform audio files
• Handling errors generated by audio functions
• Using windows messages to manage waveform audio playback
• Deallocating memory blocks associated with audio data
• Closing waveform audio output devices
• Audio Gain Classes
• Switching Preferred Audio Devices

The common order for calling Waveform Audio functions to record audio is:

1. waveInOpen
2. waveInPrepareHeader
3. waveInAddBuffer
4. waveInStart
5. waveInUnprepareHeader
6. waveInClose

The common order for calling Waveform Audio functions to play audio is:

1. waveOutOpen
2. waveOutPrepareHeader
3. waveOutWrite
4. waveOutUnprepareHeader
5. waveOutClose

See Also

Waveform Audio Application Development

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