As of SDL 2.0, supported values are 1 (mono), 2 (stereo), 4 (quad), and 6 (5.1). Unsigned 16-bit samples in native byte orderģ2-bit integer samples in little-endian byte orderģ2-bit integer samples in big-endian byte orderģ2-bit integer samples in native byte orderģ2-bit floating point samples in little-endian byte orderģ2-bit floating point samples in big-endian byte orderģ2-bit floating point samples in native byte orderĬhannels specifies the number of output channels. Unsigned 16-bit samples in big-endian byte order Unsigned 16-bit samples in little-endian byte order Signed 16-bit samples in native byte order Signed 16-bit samples in big-endian byte order Signed 16-bit samples in little-endian byte order Values higher than 48000 generally should not be used for playback purposes because they use more memory, use more CPU, and can cause other problems as explained in this blog post by Chris Montgomery of Xiph.įormat specifies the size and type of each sample element and may be one of the following: Humans can hear up to slightly under 20kHz, declining to 16kHz or lower as we age. The Nyquist Theorem states that the audio sampling frequency must be exactly twice the highest frequency represented in the audio. While all fields are used by SDL_OpenAudioDevice(), only freq, format, channels, and samples are used by SDL_LoadWAV().įreq specifies the number of sample frames sent to the sound device per second.

This structure is used by SDL_OpenAudioDevice() and SDL_LoadWAV(). dev = SDL_OpenAudioDevice(NULL, 0, &want, &have, SDL_AUDIO_ALLOW_FORMAT_CHANGE) Remarks SDL_AudioSpec want, have SDL_AudioDeviceID dev SDL_memset(&want, 0, sizeof(want)) /* or SDL_zero(want) */ eq = 48000 want.format = AUDIO_F32 want.channels = 2 want.samples = 4096 want.callback = MyAudioCallback // you wrote this function elsewhere.

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