How do I determine audio capabilities on Android?

Question

I'm experimenting with Android's audio recording and playback. Is there a way to enumerate the available audio parameters on my device?

Right now, when I pass a combination of parameters that the hardware (or emulator) doesn't like, I just get an error. So I am having to "guess":

int bufferSize; int sampleRate; // does the audio hardware do 44 kHz? sampleRate = 44100; bufferSize = AudioRecord.getMinBufferSize(sampleRate, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT); if (bufferSize != AudioTrack.ERROR_BAD_VALUE) { // Nope, how about 22 kHz? sampleRate = 22050; } bufferSize = AudioRecord.getMinBufferSize(sampleRate, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT); if (bufferSize != AudioTrack.ERROR_BAD_VALUE) { ...

Surely there's a better way!

This chart indicates that the only supported audio input sampling rate is 8 kHz? Is that correct?

Marc Bernstein · Accepted Answer · 2010-03-10 23:00:25Z

5

Have you already looked at AudioTrack.getNativeOutputSampleRate(int streamType)?

answered Mar 10, 2010 at 23:00

Marc Bernstein

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2 Comments

Seth Over a year ago

Hi Marc - yes, I've seen that and it's one piece of the puzzle, but I'm hoping for something more comprehensive (and includes input settings too).

Marc Bernstein Over a year ago

Bummer. Seems like looping through the possible parameters might be the only way possible currently. See bit.ly/c3BieY for another developer's work on this. I agree this is not very optimal, a getCapabilities() function would be nice to have.

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