#lang scribble/manual @(require (for-label racket)) @title{(sound-in channel)} Read audio from the sound input hardware. channel - input channel number to read, indexed from zero, can be mce. @racketblock[ (audition (out 0 (sound-in 0))) ] @racketblock[ (audition (out 0 (sound-in (mce2 0 1)))) ] @racketblock[ (audition (out 0 (sound-in (mce4 0 2 1 3)))) ]