CODEWITHSUNDEEP
androidios
user1777060
user1777060

Reputation: 273

Mic Input properties

I'm developing audio app(iOS/Android), and I can't find nowhere information:

How can a app read or set the microphone gain?

Are audio Digital Signal Processing tools available for the headphone jack?

Also I realize that some manufacturers develop specific accessibility features (like mono sound mode, or sound balance (left - right) on samsung devices), but they don't provide any API to check or control this feature. When I turn on/off mono mode on Samsung GS3 in logs I see:

I/AudioHardwareTinyALSA( 1904): setParameters(toMono=0)

I/audio_wfd_hw( 1904): adev_set_parameters() toMono=0

So I guess this feature provided by samsung specific hardware driver. May be in some way is possible to get pointer to AudioHardwareTinyALSA an set mono on or off? Thanks.

Upvotes: 0

Views: 687

Answers (1)

Michael
Michael

Reputation: 58457

There's no API in Android for controlling the input volume (you can mute/unmute the mic during voice calls / VoIP, but that's about the level of control that you've got).

The mic gains are typically set by the OEMs as part of their acoustic tuning process, in order to optimize the performance for each use-case (speech recognition, camera recording, handset call, etc) for that particular product.

Mono/stereo recording should simply be decided by whether the app requests 1 or 2 channels for the recording. At least that's the way it has worked on every product I've worked on, as far as I can recall.

Upvotes: 1

Related Questions