OK, I’ve got this figured out. This post was crucial in helping me: http://computermusicblog.com/blog/2008/08/29/reading-and-writing-wav-files-in-java Basically, I used ByteArrayOutputStream to write the raw PCM data from AudioRecord, which then lets me get the byte array and its size when the process is done. I can then use that data in conjunction with the SampleRate, BitRate, and … Read more
After testing this is what I came up with from modifying your code: package com.example.app; import android.app.Activity; import android.media.AudioManager; import android.media.MediaCodecInfo; import android.media.MediaFormat; import android.os.Bundle; import android.media.AudioFormat; import android.media.AudioRecord; import android.media.AudioTrack; import android.media.MediaCodec; import android.media.MediaRecorder.AudioSource; import android.util.Log; import java.io.IOException; import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.InetAddress; import java.net.SocketAddress; import java.net.SocketException; import java.nio.ByteBuffer; public class MainActivity extends … Read more
As I understand you don’t want any automatic adjustments, only manual from the UI. There is no built-in functionality for this in Android, instead you have to modify your data manually. Suppose you use read (short[] audioData, int offsetInShorts, int sizeInShorts) for reading the stream. So you should just do something like this: float gain … Read more
If your requirement is while it is recording it should play(means looping back audio), In your while loop thread, you are storing the recorded data (audioData bufer), there itself you can copy it to player object with in the while loop (player.write(audioData, 0, numShortsRead);). You said like your UI thread is stuck, it might be … Read more
I’ve been wrestling with this exact same question for hours now, and my issue was mostly that when recording in 16 bits you have to be very careful about what you write to the output. The WAV file expects the data in Little Endian format, but using writeShort writes it to the output as Big … Read more
First you need to ensure that the result you are getting is correctly converted to a float/double. I’m not sure how the short[] version works, but the byte[] version only returns the raw byte version. This byte array then needs to be properly converted to a floating point number. The code for the conversion should … Read more
To record and play back audio in (almost) real time you can start a separate thread and use an AudioRecord and an AudioTrack. Just be careful with feedback. If the speakers are turned up loud enough on your device, the feedback can get pretty nasty pretty fast. /* * Thread to manage live recording/playback of … Read more
After experimenting lots with the notifications and a bunch of other techniques I settled on this code: private class AudioIn extends Thread { private boolean stopped = false; private AudioIn() { start(); } @Override public void run() { android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO); AudioRecord recorder = null; short[][] buffers = new short[256][160]; int ix = 0; try { // … Read more
Here I am posting you the some code example which record good quality of sound using AudioRecord API. Note: If you use in emulator the sound quality will not much good because we are using sample rate 8k which only supports in emulator. In device use sample rate to 44.1k for better quality. public class … Read more