SDL Wiki
(This function is part of SDL_mixer, a separate library from SDL.)

Mix_Volume

Set the volume for a specific channel.

Syntax

int Mix_Volume(int channel, int volume);

Function Parameters

channel

the channel on set/query the volume on, or -1 for all channels.

volume

the new volume, between 0 and MIX_MAX_VOLUME, or -1 to query.

Return Value

Returns the previous volume. If the specified volume is -1, this returns the current volume. If channel is -1, this returns the average of all channels.

Remarks

The volume must be between 0 (silence) and MIX_MAX_VOLUME (full volume). Note that MIX_MAX_VOLUME is 128. Values greater than MIX_MAX_VOLUME are clamped to 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.

If the specified channel is -1, this function sets the volume for all channels, and returns _the average_ of all channels' volumes prior to this call.

The default volume for a channel is MIX_MAX_VOLUME (no attenuation).

Version

This function is available since SDL_mixer 2.0.0.


CategoryAPI


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