#lang scribble/manual @(require (for-label racket)) @title{num-output-buses} The number of audio buses allocated to output. @racketblock[ (let ((bus num-output-buses)) (audition (out 0 (mul (pulse ar 90 0.3) (amplitude kr (lag (in 1 ar bus) 0.1) 0.01 0.01))))) ]