###### (This function is part of SDL_mixer, a separate library from SDL.) # Mix_MasterVolume Set the master volume for all channels. ## Syntax ```c int Mix_MasterVolume(int volume); ``` ## Function Parameters | | | | -------------- | ------------------------------------------------------------------------------- | | **volume** | the new volume, between 0 and [MIX_MAX_VOLUME](MIX_MAX_VOLUME), or -1 to query. | ## Return Value Returns the previous volume. If the specified volume is -1, this returns the current volume. ## Remarks SDL_mixer keeps a per-channel volume, a per-chunk volume, and a master volume, and considers all three when mixing audio. This function sets the master volume, which is applied to all playing channels when mixing. The volume must be between 0 (silence) and [MIX_MAX_VOLUME](MIX_MAX_VOLUME) (full volume). Note that [MIX_MAX_VOLUME](MIX_MAX_VOLUME) is 128. Values greater than [MIX_MAX_VOLUME](MIX_MAX_VOLUME) are clamped to [MIX_MAX_VOLUME](MIX_MAX_VOLUME). Specifying a negative volume will not change the current volume; as such, this can be used to query the current volume without making changes, as this function returns the previous (in this case, still-current) value. Note that the master volume does not affect any playing music; it is only applied when mixing chunks. Use [Mix_VolumeMusic](Mix_VolumeMusic)() for that.\ ## Version This function is available since SDL_mixer 3.0.0. ---- [CategoryAPI](CategoryAPI)