Audio

AudioDriver provides fixed one-shot PCM voices and exactly one streamed OGG track at a time. GuiSound wraps both: a looping sound is treated as music and takes the single stream, and a non-looping sound is a sound effect on a voice. GuiSound::setDefaultVolume(VOLUME_TYPE::MUSIC, ...) and VOLUME_TYPE::SFX set independent global volumes (0-100) for the two categories; changing the music volume takes effect immediately on the track that is playing. OGG decoding is done by the platform-independent GuiSoundOggPlayer (Tremor) on a background thread, on every platform. On Wii U, sound is mixed to both the TV and the GamePad.

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