android-audiorecord

I use AudioRecord class to record the voice during a call. I am intererested to record only the voice of the person who owns the phone ( from the microphone). During the recording I would like to do some audio processing but this is offtopic for now. Android has the following AudioSources options: MediaRecorder.AudioSource.VOICE_CALL MediaRecorder.AudioSource.MIC MediaRecorder.AudioSource.VOICE_UPLINK MediaRecorder.AudioSource.VOICE_DOWNLINK Can you explain what is the differences among them. Ok MIC is obvious but VOICE_CALL vs VOICE_UPLINK vs VOICE_DOWNLINK ? Also I should choose a sample

I am trying to make a call recording app in Android. I am using loudspeaker to record both uplink and downlink audio. The only problem I am facing is the volume is too low. I've increased the volume of device using AudioManager to max and it can't go beyond that. I've first used MediaRecorder, but since it had limited functions and provides compressed audio, I've tried with AudioRecorder. Still I havn't figured out how to increase the audio. I've checked on projects on Github too, but it's of no use. I've searched on stackoverflow for last two weeks, but couldn't find anything at all. I am

Is there any way to intercept or just-read the audio output in android device? I need to read the whole audio output in PCM from inside myActivity, including media player application in background, voice from calls, MediaPlayer istances inside myACtivity, etc., everything that's going to played by speakers. Actually, if it was possible to read them separately, would be great as well. I tried with AudioRecord , giving it as audioSource parameter every constant found in MediaRecorder.AudioSource with no luck, should I try different audioSources? Is it a so low-level task that has to be handled

I'm working on a voice recording app. In it, I have a Seekbar to change the input voice gain. I couldn't find any way to adjust the input voice gain. I am using the AudioRecord class to record voice. recorder = new AudioRecord(MediaRecorder.AudioSource.MIC, RECORDER_SAMPLERATE, RECORDER_CHANNELS, RECORDER_AUDIO_ENCODING, bufferSize); recorder.startRecording(); I've seen an app in the Google Play Store using this functionality. 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

I'm trying to figure out what sampling rates are supported for phones running Android 2.2 and greater. We'd like to sample at a rate lower than 44.1kHz and not have to resample. I know that all phones support 44100Hz but was wondering if there's a table out there that shows what sampling rates are valid for specific phones. I've seen Android's documentation ( http://developer.android.com/reference/android/media/AudioRecord.html ) but it doesn't help much. Has anyone found a list of these sampling rates?? The original poster has probably long since moved on, but I'll post this in case anyone