Android native audio recorder sample rate

Question

I'm looking at native-audio example. What is the default sample rate?

Thanks, Nahum

Answer 1

I hope this helps:

native-audio-jni.c

    // configure audio source
    SLDataLocator_AndroidSimpleBufferQueue loc_bufq = {SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE, 2};
    SLDataFormat_PCM format_pcm = {SL_DATAFORMAT_PCM, 1, SL_SAMPLINGRATE_8,
        SL_PCMSAMPLEFORMAT_FIXED_16, SL_PCMSAMPLEFORMAT_FIXED_16,
        SL_SPEAKER_FRONT_CENTER, SL_BYTEORDER_LITTLEENDIAN};
    SLDataSource audioSrc = {&loc_bufq, &format_pcm};

The constants are defined in /ARCHITECTURE/usr/include/SLES/OpenSLES.h

#define SL_SAMPLINGRATE_8          ((SLuint32) 8000000)

So the sample rate should be 8kHz.