You definitely need to use a higher sample rate. At 8Khz it will sound like talking through a phone - very noisy.
-niko On Sep 15, 3:51 am, Harpreet <[email protected]> wrote: > Hello everybody > > Any thought? > > On Sep 13, 9:19 pm, harpreet singh <[email protected]> wrote: > > > > > > > > > Hi, > > > I am trying to record the voice using AudioRecord class and writing > > the read bytes to speaker using AudioTrack class. I am able to hear > > the voice coming from Speaker but the voice is very low and a lot ofnoiseis > > coming along with the recorded voice. > > > Any solution to resolve this problem to reduce thenoiseand loud the > > actual voice. > > > I am using below code for this: > > > package com.my.mic.record; > > > import android.media.AudioFormat; > > import android.media.AudioManager; > > import android.media.AudioRecord; > > import android.media.AudioTrack; > > import android.media.MediaRecorder; > > import android.util.Log; > > > public class Record extends Thread > > { > > > int numCrossing,p,numSamples,af; > > > static final int bufferSize = 200000; > > short[] buffer = new short[bufferSize]; > > short[] readBuffer = new short[bufferSize]; > > boolean isRecording; > > AudioManager am; > > > public AudioRecord arec; > > public AudioTrack atrack; > > > private int sampleRate = 8000; > > > public void run() { > > > isRecording = true; > > > android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URG > > ENT_AUDIO); > > > int buffersize = > > AudioRecord.getMinBufferSize(sampleRate,AudioFormat.CHANNEL_CONFIGURATION_M > > ONO, > > AudioFormat.ENCODING_PCM_16BIT); > > > arec = new > > AudioRecord(MediaRecorder.AudioSource.MIC,sampleRate,AudioFormat.CHANNEL_CO > > NFIGURATION_MONO,AudioFormat.ENCODING_PCM_16BIT, > > buffersize); > > > //buffersize = arec.getMinBufferSize(arec.getSampleRate(), > > arec.getChannelConfiguration(), arec.getAudioFormat()); > > > atrack = new > > AudioTrack(AudioManager.STREAM_MUSIC,arec.getSampleRate(),arec.getChannelCo > > nfiguration(),arec.getAudioFormat(), > > buffersize,AudioTrack.MODE_STREAM); > > > > > am.setRouting(AudioManager.MODE_NORMAL,AudioManager.ROUTE_EARPIECE, > > AudioManager.ROUTE_ALL); > > //am.setMode(AudioManager.MODE_NORMAL); > > > Log.d("SPEAKERPHONE", "Is speakerphone on? : " + > > am.isSpeakerphoneOn()); > > > atrack.setPlaybackRate(sampleRate); > > > byte[] buffer = new byte[buffersize]; > > arec.startRecording(); > > atrack.play(); > > //atrack.setStereoVolume(atrack.getMaxVolume(), > > atrack.getMaxVolume()); > > > final float frequency = sampleRate; > > float increment = (float)((2*Math.PI) * frequency / 44100); // > > angular increment for each sample > > float angle = 0; > > //AndroidAudioDevice device = new AndroidAudioDevice( ); > > > while(isRecording) { > > > try { > > > arec.read(buffer, 0, buffersize); > > atrack.write(buffer, 0, buffer.length); > > > } catch (Exception e) { > > Log.d("Record", ""+e); > > } > > } > > > arec.stop(); > > atrack.stop(); > > //device.releaseTrack(); > > isRecording = false; > > } > > > public boolean isRecording() { > > return isRecording; > > } > > > public void setRecording(boolean isRecording) { > > this.isRecording = isRecording; > > } > > > public AudioManager getAm() { > > return am; > > } > > > public void setAm(AudioManager am) { > > this.am = am; > > } > > > public void stopRecording(){ > > arec.stop(); > > arec.release(); > > atrack.stop(); > > atrack.release(); > > arec=null; > > atrack=null; > > setRecording(false); > > this.stop(); > > } > > > } -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
