Dummy audio source trouble. - Raspberry Pi Forums

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hello,
working on project needed raspberry pi configured sip client.so installed linphone , working great exempt 1 problem.i want sip client work speaker. don't need have audio input.but linphone needed specified capture device work.since raspberry pi doesn't have capture device,i made dummy device info found on

http://www.raspberrypi.org/forums/viewt ... p?&t=42285

works fine too.but when connect pi client client,it gives me disturbing noise.when mute linphone client form command line of pi.the sound stops.
linphone reading thing capture device.

tried writing code linphonecsh thought rid of need gui linphone didn't work put.i wanted auto answer , auto mute every call.so wrote following code.

linphonecsh init
linphonecsh register --host <my host> --username <mine> --password <mine>
linphonecsh generic "autoanswer enable"
linphonecsh generic "mute"

got functionality working exempt mute function using shell script follows.

!#bin/bash
linphonec -a

registration part done in gui once , when ever linphonec -a executed automatically registered server.

can please tell me way either
1) write effective bash code auto mute every call

or

2) rid of spurious noise coming dummy source.

love know reason why noise coming.

thank you



raspberrypi



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