[arm-allstar] Distorted audio (sampling?)

[Danny K5CG]

Alessio,

It sounds like you need to do some testing in a controlled manner to eliminate as many unknowns as possible.

Do you have a service monitor? Generate input RF, add a tone, record it. Is the distortion still there?

Danny
K5CG

----- Original Message -----
From: "ARM Allstar" <arm-allstar at hamvoip.org>
To: "ARM Allstar" <arm-allstar at hamvoip.org>
Cc: "Alessio Sacchi" <iz4efn at gmail.com>
Sent: Thursday, September 12, 2019 9:55:51 AM
Subject: Re: [arm-allstar] Distorted audio (sampling?)

Hi David, thanks. I will immediately begin recording with uLAW and find a
few samples to share.

>>is the same noise heard on all your AllStar connected receivers or just
one?
All connected receivers. To clarify:
- A distorsion over a signal coming from the 50MHz port is heard on
echolink, on 70cm and on 23cm
- Distorsion can happen regardless of the input ports - except for audio
coming from echolink. Meaning that signals coming from each of the radio
ports can be affected by distorsion. Audio from echolink seems to be pushed
out clean at all times.

Alessio

On Thu, Sep 12, 2019 at 4:01 PM "David McGough via ARM-allstar" <
arm-allstar at hamvoip.org> wrote:

>
> BTW, I noticed that the dropbox .wav files are in the GSM CODEC format.
> For diagnosing audio issues, I recommed saving the files using the much
> higher audio quality uLAW CODEC, rather than GSM. The negative drawback is
> that the files will be bigger, of course.
>
> To enable saving uLAW formatted files, in your /etc/asterisk/rpt.conf file
> node stanzas, add:
>
> archivetype=pcm
>
>
> 73, David KB4FXC
>
>
> On Thu, 12 Sep 2019, "David McGough via ARM-allstar" wrote:
>
> >
> > Hi Alessio,
> >
> > To me, the distortion heard in your recordings doesn't sound it's coming
> > from the HamVoIP/AllStar software. My first suspicion is noise on the
> > receiver audio, which leads me to a question: is the same noise heard
> > on all your AllStar connected receivers or just one?
> >
> >
> > 73, David KB4FXC
> >
> >
> >
>
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