audio-recording

I want to apply gain to my recordings(PCM 16bit). For this I have the following code: for (int i=0; i<buffer.length/2; i++) { // 16bit sample size short curSample = getShort(buffer[i*2], buffer[i*2+1]); if(rGain != 1){ //apply gain curSample *= rGain; //convert back from short sample that was "gained" to byte data byte[] a = getByteFromShort(curSample); buffer[i*2] = a[0]; buffer[i*2 + 1] = a[1]; } If applied like this(multiplying each sample with the fraction number), I get discontinues when playback(hearing like an old walkie-talkie). Is there some formula to vary my gain factor on each

I need to record more than one audio at a time. I have two record buttons if I clicked the first record button audio recording will be started. Before stop that audio recording If I am clicking the second record button I need to record the another one audio separately. Is there possibility to record more than one audio at a time ? Thanks in advance..! AFAIK, this is not possible, unless you have multiple Microphones. The Reason behind this answer is, Recording is an synchronized method, so only one instance can use it at a time. 来源： https://stackoverflow.com/questions/9715505/android-record

i'm working on an app that records sound. furthermore, i want the user to be able to comment certain situations with his own voice. i thought it would be sufficient to configure one audio session and just create two AVAudioRecorder instances with different file URLs. but that doesn't work, the second audio recorder does create its audio file, but it doesn't record any sound. does anyone know how to realize two AVAudioRecorder instances that actually work on one device? recording with only one AVAudioRecorder works, but using both doesn't work. i have a workaround in mind, but that's a bunch of

I need to perform low-level audio capture in my Windows 8 Metro-style app. I guess I need to use the IAudioClient interface, but how to get that interface? Microsoft says "A client obtains a reference to an IAudioClient interface for an audio endpoint device by using one of the techniques described in IMMDevice Interface.." http://msdn.microsoft.com/en-us/library/windows/desktop/dd370865(v=vs.85).aspx but IMMDevice interface is not supported for Metro-style apps. How does one get an IAudioClient interface ? I got an answer from the MSDN forums: Platform::String^ id = Windows::Media::Devices:

I have an android code which can work well on Android 5.0 version. My AndroidManifest.xml is <uses-permission android:name="android.permission.BLUETOOTH" /> <uses-permission android:name="android.permission.BROADCAST_STICKY" /> <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" /> <uses-permission android:name="android.permission.RECORD_AUDIO" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/> <uses-permission android:name="android.permission.WAKE_LOCK" /> However, my

I'd like to record the audio coming from my iPhone app. So after the background music and sound effects are mixed I'd like to sample the audio before it's played from the device's speakers (or headphones). I've been experimenting with RemoteIO Audio Units . These seem promising. However they're pretty low level. Can AVAudioRecorder (or other "high-level" object) be used to capture audio coming from an iOS device? kevlar As far as I can tell, there's no way to do this with AVAudioRecorder. You must use Audio Units. Record audio iOS Is there a way to record device audio on the iPhone? Record

I am using recorder.js to record two audio files on my web page, which then creates recordings as blobs. Once I have these audio blobs I would then like to combine them both into one track to be played by another html5 audio player. I've searched the internet but I can't seem to find any documentation on combining two blob files into one. I've found how to concatenate one blob to the other but I'm wanting to merge the files at the beginning. i.e. - sound 1 is singing and sound 2 is guitar. I made a similar attempt using recorder.js and it did not work out for me too. Even after downloading the