[Freeswitch-users] bridge_generate_comfort_noise not honoring integer value for volume level

[Matthew Meek]

The values of -2,-1  50, 1400, and 4000 all have the same volume of whitenoise.  I am setting it with:

<action application="set" data="bridge_generate_comfort_noise=4000"/>

I can see in the code where this should work (although -1 is doubtful to be silence as the if block checks for silence_val < -1 instead of <= -1), but in practice the value has no effect. I am not sure if the value is over-ridden somewhere else.

-Matthew Meek


The higher the number the softer it will get.  You say 4000 didn't work?  -1 should be absolute silence.

On Thu, Dec 14, 2017 at 6:01 AM, Matthew Meek <mmeek at livexchange.com<mailto:mmeek at livexchange.com>> wrote:

I can successfully inject whitenoise on the bridged leg (audio from A leg towards the bridged call) in the dial plan by setting bridge_generate_comfort_noise=true. The whitenoise is quite loud and I would like to make it quieter or silent (I am just trying to keep the far end firewall port open during long periods of A leg not sending packets due to hold).  I have tried values of -1, 40,1400, and 4000 instead of true and they produce the same amount of whitenoise volume. The source code in switch_ivr_bridge.c looks like it indeed honors an integer value, but somehow the end result is always the same. If I do not set the variable I get no whitenoise, so the variable is indeed controlling whitenoise, just not the volume level of whitenoise. The codec is PCMU.



I can repeat this with 1.2, 1.4, and 1.6 branches of FS.



Matthew Meek

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