Does this on my SHARI PiXX as well. Seems to maybe be an issue with the SA818 based transceivers.
I wonder if the USB "pipe" can not handle the data? I even tried the "blue 3.0 " USB port on a Raspberry pi 4 and the Audio is still choppy.
Another thought is I am using the SimpleUSB driver. I was not able to get the USBradio driver to work, maybe try that?
73's
Mike WA3O
I'm using USBradio. No change,
I tried with both simpleusb and usbradio. The result is consistent. For whatever reason, audio is always choppy from Echolink to any USB device. I tried with an Aursinc, a real SHARI and a UCI120. I haven't tried piping the audio of app_rpt directly to the codec on the Raspberry Pi using outstreamcmd and aplay yet, though. It seems as if other connected ASL nodes also receive choppy audio from Echolink until the sound fob is disassociated with the node.
If your cause and effect are not similar, you should start a thread of your own for resolution with your different particulars.
And that info given is
Not a lot to work with
But I would remind everyone that echolink is a peer to peer system like ASL.
AND
With all of the cell phone apps out there, there is a high possibility of network congestion for uplink speeds are not always the same as downlink speeds and cell networks can throttle speeds based on congestion.
And the possibility of app error on the cell device.
Or any combination of several things.
Just something to think about.
I await additional info before passing judgement. As I said, not a lot to work with here in info. But a test of different devices and networks would be in order.
Understood, Mike. I tried to politely back out of the thread after my first reply because I didn't want to hijack the OP's thread. I'm away on vacation this week. Will get my act together and start my own thread next week. Thanks for the reply.
Dan
Dan, please take no offense from my post,
often I speak more broadly to those that stumble on old posts later.
And we see them re-surface all the time.
Here we are waiting on more qualifying info.
Mike,
The noise I get is a popping that is "rhythmic" in nature. I had Chuck confirm that the noise was there when I connected with a computer on a stable internet. We also confirmed the noise went away when the USB radio was unplugged and we where connected via a cell phone.
It is my belief that this is definitely not net work congestion.
Thanks
73's
Mike WA3O
Well, just my opinion, but there is quite a difference in troubleshooting between
'choppy audio' and 'popping that is "rhythmic" in nature'
That sounds more like emi/rfi.
Yep. I have one of the Aursinc radios coming to look in to the issue further. It's actually pretty hard to hear periodicity most of the time on a human voice - it just sounds choppy until you hear a long enough phoneme.
No offense taken, Mike. I'll be back home on Monday and will put together better details.
Dan
Mike,
You could stop by my Allstar link and I could give you a demo of the popping / chopping (647870). We actually don't live that far apart as well. I am in Weirton, Wv.
73's
Mike WA3O
After returning from that trip and having a heart attack (doing much better post stent), I finally had tiime to put some more time in troubleshooting and testing this.
This is my environment.
root@debian-asl3:/etc# uname -r
6.12.22+bpo-amd64
Linux debian-asl3 6.12.22+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.22-1~bpo1 2+1 (2025-04-25) x86_64
There is not a radio connected to this node. I'm using dahdi dummy, I'm willing to do any other testing or provide any info that will help.
The issue seems to only happen with nodes that are connected using Echolink. Connections from other Allstar nodes are perfect. My test node is on my phone. I have tried with both relay and proxy mode.
I'm glad to hear you're still with us, Dan. 
Is the choppiness periodic or random?