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


Explicitly unregister all special effect functions.

Header File

Defined in <SDL_mixer.h>


int Mix_UnregisterAllEffects(int channel);


Function Parameters

int channel the channel to unregister all effects on, or MIX_CHANNEL_POST.

Return Value

(int) Returns zero if error (no such channel), nonzero if all effects removed. Error messages can be retrieved from Mix_GetError().


You may not need to call this at all, unless you need to stop all effects from processing in the middle of a chunk's playback.

Note that this will also shut off some internal effect processing, since Mix_SetPanning() and others may use this API under the hood. This is called internally when a channel completes playback. Posteffects are never implicitly unregistered as they are for channels, but they may be explicitly unregistered through this function by specifying MIX_CHANNEL_POST for a channel.

Note that unlike most SDL and SDL_mixer functions, this function returns zero if there's an error, not on success. We apologize for the API design inconsistency here.


This function is available since SDL_mixer 2.0.0.

CategoryAPI, CategoryAPIFunction

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