[arm-allstar] multiple echo link connections and "under water" audio

[David McGough]

I'll try to reproduce this audio issue over the next several days.

If anyone has some active nets where this issue is happening, I'll try to 
link in via echolink and have a listen.

Also, if any user can link a HamVoIP system into one of these nets, using 
chan_echolink, and capture some audio that might be useful. Please record 
the audio file using PCM (uLAW). That is accomplished by setting the 
rpt.conf node parameter: archivetype=pcm

73, David KB4FXC



On Fri, 14 Feb 2020, "Patrick Perdue via ARM-allstar" wrote:

> I am experiencing it on a rPI 4 1GB, also tested with the same results 
on a rPi 2, and same with a stock ASL server on x64 VPS.

On 2/14/2020 3:00 PM, "Kevin Custer via ARM-allstar" wrote:
> I have had the "underwater" sounding audio issue with certain X86 
> servers using DIAL.  It usually occurs after the node has sit idle for 
> some time, and usually presents this issue for a few transmissions 
> then clears up.  The fix was to move to different hardware.  I've 
> never experienced it on a RPi no matter the distribution.
>
> Kevin W3KKC
>
> On 2/14/2020 10:41 AM, "David McGough via ARM-allstar" wrote:
>> This isn't typical of what I've heard when listening to nets with many
>> echolink users, so I'm curious as to what the cause is??
>>
>> Do remember that the HamVoIP distro is radically different from ASL, 
>> from
>> a software perspective. ASL or any AllStar running on a cloud-hosted VPS
>> is the WORST CASE scenario for bad audio issues. So, don't make a
>> generalization assuming that if there is a problem with VPS hosted ASL,
>> there will also be the same problems with HamVoIP running on a dedicated
>> RPi3 or RPi4 board.
>>
>> Do you know of a repeatable scenario where bad quality echolink audio 
>> can
>> be produced?
>>
>> 73, David KB4FXC
>
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