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SDL_MixAudioFormat - SDL Wiki
https://wiki.libsdl.org/SDL_MixAudioFormat
the destination for the mixed audio. src. the source audio buffer to be mixed. format. the SDL_AudioFormat structure representing the desired audio format. len. the length of the audio buffer in bytes. volume. ranges from 0 - 128, and should be …
What data should I write to SDL audio callback buffer ...
https://stackoverflow.com/questions/50254228/what-data-should-i-write-to-sdl-audio-callback-buffer
There are so many audio formats from SDL Doc, but no more information about what actual data I should write to the callback buffer. I tested these formats: float with Sine: (-1,1) S8(signed byte) with square wave: [-128, 127] U16(unsigned short): [-32768, 32767] All of them worked. The question is that I don't know what exactly these audio formats mean.
SDL_ConvertAudio - SDL Wiki
https://wiki.libsdl.org/SDL_ConvertAudio
After SDL_BuildAudioCVT () returns, the application should set the cvt->len field to the size, in bytes, of the source data, and allocate a buffer that is cvt->len * cvt->len_mult bytes long for the buf field. The source data should be copied into this buffer before the call to SDL_ConvertAudio (). Upon successful return, this buffer will contain the converted audio, and cvt->len_cvt will be …
SDL_AudioSpec - Simple DirectMedia Layer
https://www.libsdl.org/release/SDL-1.2.15/docs/html/sdlaudiospec.html
Description. The SDL_AudioSpec structure is used to describe the format of some audio data. This structure is used by SDL_OpenAudio and SDL_LoadWAV. While all fields are used by SDL_OpenAudio only freq, format, samples and channels are used by SDL_LoadWAV. We will detail these common members here. freq.
SDL_AudioSpec - SDL Wiki
https://wiki.libsdl.org/SDL_AudioSpec
SDL_AudioSpec want, have; SDL_AudioDeviceID dev; SDL_memset(&want, 0, sizeof (want)); /* or SDL_zero(want) */ want.freq = 48000; want.format = AUDIO_F32; want.channels = 2; want.samples = 4096; want.callback = MyAudioCallback; // you wrote this function elsewhere. dev = SDL_OpenAudioDevice(NULL, 0, &want, &have, SDL_AUDIO_ALLOW_FORMAT_CHANGE);
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