6. Defines

SDL_MIXER_MAJOR_VERSION

1
SDL_mixer library major number at compilation time

SDL_MIXER_MINOR_VERSION

2
SDL_mixer library minor number at compilation time

SDL_MIXER_PATCHLEVEL

9
SDL_mixer library patch level at compilation time

MIX_CHANNELS

8
The default mixer has this many simultaneous mixing channels after the first call to Mix_OpenAudio.

MIX_DEFAULT_FREQUENCY

22050
Good default sample rate in Hz (samples per second) for PC sound cards.

MIX_DEFAULT_FORMAT

AUDIO_S16SYS
The suggested default is signed 16bit samples in host byte order.

MIX_DEFAULT_CHANNELS

2
Stereo sound is a good default.

MIX_MAX_VOLUME

128
Maximum value for any volume setting.
This is currently the same as SDL_MIX_MAXVOLUME.

MIX_CHANNEL_POST

-2
This is the channel number used for post processing effects.

MIX_EFFECTSMAXSPEED

"MIX_EFFECTSMAXSPEED"
A convience definition for the string name of the environment variable to define when you desire the internal effects to sacrifice quality and/or RAM for speed. The environment variable must be set (else nonexisting) before Mix_OpenAudio is called for the setting to take effect.