audio-recording

I am trying to record audio in android but I am facing a problem. I have start and stop buttons, "start" for starting recording and "stop" for stopping recording. The problem is, when I press the stop button then my application logs a message "W/MediaRecorder(635): mediarecorder went away with unhandled events". (Start function is saving the audio file properly.) Then, if I again press start or stop button then I get error message " A/libc(743): Fatal signal 11 (SIGSEGV) at 0x00000010 (code=1), thread 743 (xample.recorder)" Code of recording class is below: /** * Creates a new audio recording

I am implementing live streaming from MIC to java server at another PC. But I am only hearing a white noise. I have attached both client and server program Client: import java.io.IOException; import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.InetAddress; import java.net.SocketException; import java.net.UnknownHostException; import javax.sound.sampled.AudioFormat; import javax.sound.sampled.AudioInputStream; import javax.sound.sampled.AudioSystem; import javax.sound.sampled.DataLine; import javax.sound.sampled.LineUnavailableException; import javax.sound.sampled

I want to record audio with iPhone and then upload it to server. I could record the audio, but my question is about which format should I use to record audio, so that the Recorder will result a file with smallest file size. Here are the results for few encoding supported by iPhone. Size of audio file in KB of duration 10 sec. kAudioFormatMPEG4AAC : 164 , kAudioFormatAppleLossless : 430, kAudioFormatAppleIMA4 : 475, kAudioFormatULaw : 889, kAudioFormatALaw : 889, Among these kAudioFormatMPEG4AAC is having smallest size. Srikar Appalaraju Apple iOS supports playback audio in these formats: AAC

I need to develop an iOS App in swift which detects a blow in the microphone from a user. This has to be a Challenge-Game where two players have to blow into the iPhone mic one after the other. The decibel values should be measured and converted in meter or kilometer so I can determine a winner. The player which "blows further" (player1: 50km, player2: 70km) wins. Is this a possible implementation? I have this code in swift and I don't know how to proceed: import Foundation import UIKit import AVFoundation import CoreAudio class ViewController: UIViewController { // @IBOutlet weak var

I am recording audio from getUserMedia({audio:true}); in the browser using Recorder.js and then exporting it as a WAV file because that's the only option the library provides. A 1 minute 20 seconds file is 14.1 MB large. I need to upload the audio to a server and I need to do it fast. How do I convert the WAV audio in any other compressed format to lower the file size? I don't mind converting to: MP3 Opus WebM Ogg FLAC any other format you know of If there is no way as of now to convert to any of these formats, how can I compress the WAV file on the client? PS: I did a lot of searches to find

I've been trying to get my application recording the sound coming from the microphone and playing it back in (approximately) real-time, however without success. I'm using AudioRecord and AudioTrack classes for record and playback, respectively. I've tried different approaches, I've tried to record the incoming sound and write it to a file and it worked fine. I've also tried to playback sound from that file AFTER with AudioTrack and it worked fine too. The problem is when I try to play the sound in real-time, instead of reading a file after it's written. Here is the code: //variables private

I m just implementing sphinx4 speech recognition in java..whta i need is how to record sound or convert any sound .wave file in to 16khz 16bit mono little-endian file. had search a lot for this..but no specific guidance i have got..hope anyone from stack overflow family can help me out or give me a proper guidance in that. 1). i need to just record audio in android with the 16khz 16bit mono little-endian file format in wave file or 2). i need to convert the prerecorded file with any sampling rate with the 16khz 16bit mono little-endian format in java.. i need to implement one of above feature.