xml - Audio quality difference on Kitkat / Lollipop -

i attempting record audio on android , encounter issues quality, respectively chosen format.

i use following setup

mr=new mediarecorder(); mr.setaudiosource(mediarecorder.audiosource.mic); mr.setoutputformat(mediarecorder.outputformat.mpeg_4); mr.setoutputfile("somepath"); mr.setaudioencoder(mediarecorder.audioencoder.aac); 

that code returns different results on 2 devices running different android versions (4.4.4 , 5.1.1).

when take @ file headers, shows different formats both files there (3gp4 on 4.4.4 - mp42 on 5.1.1). vlc "insists" on both using aac, shows different sampling rates, 8k 4.4.4 file , 48k 5.1.1.

anybody idea why?

try set of this:

recorder.setaudiosource(mediarecorder.audiosource.mic); recorder.setoutputformat(mediarecorder.outputformat.mpeg_4); recorder.setaudioencoder(mediarecorder.audioencoder.aac); //i use mediarecorder.audioencoder.amr_nb recorder.setaudioencodingbitrate(16); recorder.setaudiosamplingrate(44100); recorder.setoutputfile(outputfile.getabsolutepath()); recorder.prepare(); recorder.start(); 

or use external library: http://rehearsalassist.svn.sourceforge.net/viewvc/rehearsalassist/android/releases/rehearsalassistant_0_8_2/src/urbanstew/rehearsalassistant/

by changing recorder:

 rehearsalaudiorecorder recorder = new rehearsalaudiorecorder(rehearsalaudiorecorder.recording_uncompressed, mediarecorder.audiosource.mic, 44100, audioformat.channel_configuration_stereo, audioformat.encoding_pcm_16bit);  recorder.setoutputfile(outputfile.getabsolutepath());  recorder.prepare();  recorder.start(); 

update

check this:

mediarecorder recorder = new mediarecorder(); recorder.setaudiosource(mediarecorder.audiosource.mic); if (build.version.sdk_int >= 10) {     recorder.setaudiosamplingrate(44100);     recorder.setaudioencodingbitrate(96000);     recorder.setoutputformat(mediarecorder.outputformat.mpeg_4);     recorder.setaudioencoder(mediarecorder.audioencoder.aac); } else {     // older version of android, use crappy sounding voice codec     recorder.setaudiosamplingrate(8000);     recorder.setaudioencodingbitrate(12200);     recorder.setoutputformat(mediarecorder.outputformat.three_gpp);     recorder.setaudioencoder(mediarecorder.audioencoder.amr_nb); } recorder.setoutputfile(file.getabsolutepath()); try {     recorder.prepare(); } catch (ioexception e) {     throw new runtimeexception(e); } 

it seems devices sdk lower 10 cannot record quality.