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/*                           Simple audio in from mic/line                                                                                            */
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AudioIn: read audio input from ADC
AudioIn.ar(channel, mul, add)
Reads audio from the sound input hardware (microphone, line in etc. )

channel - input channel number to read. Channel numbers begin at 1.
(
 Synth.scope({ AudioIn.ar([1,2])}); // this does a multi channel expansion, hence
          // you will get a scope for each channel (1 and 2)
)