[arm-allstar] decreasing delay of repeated audio

[David McGough]

Patrick,

Check the setting of the simpleusb rxaudiodelay parameter. Each increment 
of this parameter adds 20mSec of audio thru-put delay.  This parameter may 
need to be set high to eliminate squelch tails, of course.

There is a moderate amount of unavoidable delay going through the entire 
asterisk software chain---perhaps 250mSec, which is what's typical on my 
repeaters.

One thing you can do with a repeater is transmit PL tone. Then, on each 
simplex receiver, decode PL. This will effectively mute the early audio 
getting to the simplex radio, reducing the chances of hearing the tail-end 
of your own transmission.

For me, in practice, this delay hasn't really been a big deal, once users
get accustomed to it.

What kind of repeater or controller are you using?  Is it adding extra 
delay or is it a straight-thru analog path?

73, David KB4FXC



On Tue, 22 Sep 2020, "Patrick Perdue via ARM-allstar" wrote:

> Hi:
> 
> If I am using a node in duplex=2, say, for use as a repeater controller, 
> how can I decrease the delay of repeated audio? It's currently about 500 
> ms, which seems ridiculously high for audio coming into and out of a 
> local device. It's not like it's going to the internet first, then 
> coming back to the node. It's easily enough that you hear nearly a half 
> second of the end of your transmission when you unkey, if your radio 
> switches back to receive fast enough.
> 
> Thanks and 73
> 
> KE4DYI
> 
> 
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