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


Cause a channel to reverse its stereo.

Header File

Defined in <SDL_mixer.h>


int Mix_SetReverseStereo(int channel, int flip);

Function Parameters

int channel The mixer channel to reverse, or MIX_CHANNEL_POST.
int flip non-zero to reverse stereo, zero to disable this effect.

Return Value

(int) Returns zero if error (no such channel or Mix_RegisterEffect() fails), nonzero if reversing effect is enabled. Note that an audio device in mono mode is a no-op, but this call will return successful in that case. Error messages can be retrieved from Mix_GetError().


This is handy if the user has his speakers hooked up backwards, or you would like to have a trippy sound effect.

Calling this function with flip set to non-zero reverses the chunks's usual channels. If flip is zero, the effect is unregistered.

This uses the Mix_RegisterEffect() API internally, and thus is probably more CPU intensive than having the user just plug in his speakers correctly. Mix_SetReverseStereo() returns without registering the effect function if the audio device is not configured for stereo output.

If you specify MIX_CHANNEL_POST for channel, then this effect is used on the final mixed stream before sending it on to the audio device (a posteffect).

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

[ edit | delete | history | feedback | raw ]

[ front page | index | search | recent changes | git repo | offline html ]

All wiki content is licensed under Creative Commons Attribution 4.0 International (CC BY 4.0).
Wiki powered by ghwikipp.