audio fallback mode: select out-of-range parameter handling.
AUDIO_FALLBACK_MODE_DEFAULT: System will determine best handling.
AUDIO_FALLBACK_MODE_MUTE: Play silence for params normally out of range.
pitch: increases or decreases the tonal frequency of the audio content. It is expressed as a multiplicative factor, where normal pitch is 1.0f.
speed: increases or decreases the time to play back a set of audio or video frames. It is expressed as a multiplicative factor, where normal speed is 1.0f.
Different combinations of speed and pitch may be used for audio playback; some common ones:
- Pitch equals 1.0f. Speed change will be done with pitch preserved, often called timestretching.
- Pitch equals speed. Speed change will be done by resampling,