asterisk/configs/alsa.conf.sample

;
; Open Sound System Console Driver Configuration File
;
[general]
;
; Automatically answer incoming calls on the console?  Choose yes if
; for example you want to use this as an intercom.
;
autoanswer=yes
;
; Default context (is overridden with @context syntax)
;
context=local
;
; Default extension to call
;
extension=s
;
; Default language
;
;language=en
;
; Silence supression can be enabled when sound is over a certain threshold.
; The value for the threshold should probably be between 500 and 2000 or so,
; but your mileage may vary.  Use the echo test to evaluate the best setting.
;silencesuppression = yes
;silencethreshold = 1000
;
; To set which ALSA device to use, change this parameter
;input_device=hw:0,0
;output_device=default