[arm-allstar] Better audio?

Chris Zenchenko wb9rsq at gmail.com
Wed Apr 20 08:08:37 EST 2016


Sorry about the length ahead of time.

I just moved my simplex node to a DR1X repeater and have started to
reconfigure much of my node.
Since I was using an older radio for the simplex operation I didn't pay much
attention to the audio quality.
However now as a repeater system under full allstar control I am quite
unhappy with the audio.
Some things I don't understand:
The differences and impact of the rx and tx parameters between the
simpleusb.conf and the simple_tune_usb.conf don't seem to be apparent.
I toggled the preemphasis parameter in simpleusb.conf but it didn't seem to
matter much.
We added the amp power to the URI and at least that increased the levels
enough to make the system usable but it also seemed to increase the
background noise level going to the TX while keyed even with no audio.
Is there a way to add some sort of eq?
What parameters would increase the input so that output could be dialed
back?
I'm including as input items for increase not only OTA audio but tones and
local audio and of course allstar audio from external connections.

I am running the DR1X with squelch open and the node is ignoring ctcss and
carrier detect. Can the allstar control get either of these signals from the
DR1X when allstar is the controller?
At the moment I've got quite a squelch tail!
I realize that I could go to the DR1X control mode or add some sort of other
external controller but I really wanted to have allstar be the only
controller in the mix.

Any help would be appreciated.



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