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On Android, you can record audio from the microphone using the MediaRecorder class: MediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
I want to record some parts of audio being played by a MediaPlayer instance instead (or some other audio playback device). Is that possible? How would I set a custom audio source?
To summarize; how do I stream audio into the MediaRecorder from an arbitrary audio source?
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Swipe down from the top of your screen to see the quick settings tiles and tap the screen recorder button. A floating bubble will appear with a record and microphone button. If the latter is crossed out, you're recording internal audio, and if it's not, you get sound straight from your phone's mic.
I don't think there is an API for that for now. Though it IS possible, you would have to have access to the device's buffer, down to the kernel/hardware level. Even if you find a way, I don't think Android would give you permission to do this on application level.
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