Introduction - If you have any usage issues, please Google them yourself
the ANDROID_KEY_PCMFORMAT_ keys follow the fields of the SLDataFormat_PCM struct, and as such all values corresponding to these keys are of SLuint32 type, and are defined as the fields of the same name in SLDataFormat_PCM. The exception is that sample rate is expressed here in Hz units, rather than in milliHz units.