I would like to show a bar graph visualisation while recording audio. How can I do this?
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Take a look at this: https://github.com/felixpalmer/android-visualizer for a full example of developing a visualizer on Android. This uses the MediaPlayer to play, although you should be able to hook it up to your audio recorder

pheelicks
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3how do we hook it up to the AurdioRecord object? – Soham Jun 10 '12 at 18:47
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Try reading about Visualizer. You can represent your audio either as a Waveform data or a Frequency data.
Also see this. It includes a sample code for creating a Visualizer.
Hope it helps
Cheers

Parth Doshi
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