Show AudioEffectCapture by use of a shader showing the captured waveform in stereo #1172
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Microphone data is normally read using AudioEffectCapture rather than AudioEffectRecord, so we should adapt this demo project to use it. And a good way to show that something is happening is to plot the waveform using a shader.
This shows it in stereo because a lot of computers have two microphones.
It's also useful to measure the sample rate of the microphone according to the data stream it is generating.