[Freeswitch-users] Timing issues with Verto, SIP client works fine

[Gregor Nanger]

On which OS is FS installed?

On Thu, 18 Jun 2020, 18:59 Support from NetworkedAudio LLC, <support at naud.io>
wrote:

> Have done some more testing - the issue appears to be that packets are
> dropped or a timing resync happens when connecting to PortAudio through the
> dialplan.
>
> Tests:
>
> Soft phone (MicroSIP) > Conference > Verto (on Chrome) - sounds great.
> Verto (on Chrome) > Conference > Verto (on Chrome) - sounds good, some
> crunchiness, some drops.
> Soft phone (MicroSIP) > PortAudio > external system > PortAudio > Verto
> (on Chrome) sounds pretty good.
> Verto (on Chrome) > PortAudio > external system > PortAudio > Verto (on
> Chrome) sounds quite poor, lost words.
>
> External system is 48KHz and PortAudio > external system > PortAudio
> sounds perfect.
>
> Recordings of the above are at https://bit.ly/3EFFyb0
>
> Jitter buffers aren't making any difference and the timer_test shows good
> numbers. All are using the Opus CODEC.
>
> Any other ideas, please ?
>
>
>
> ------------------------------
> *From:* Support from NetworkedAudio LLC
> *Sent:* Wednesday, June 10, 2020 2:35 PM
> *To:* FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
> *Subject:* Timing issues with Verto, SIP client works fine
>
> Hi all,
>
> We're using VERTO in an intranet application.
>
> If we do anything other than an echo test, we get dropouts on bridge (to
> SIP phone or PortAudio), which either drops whole sounds (count
> 1,2,4,5,7,8) or slurs ("se-even").
>
> This happens with MS Edge (worse) and Chrome (better), with PCMU and OPUS.
>
> Turning off audio processing (googEcho...) has no effect. Changing
> RTP_TIMER from SOFT to NONE seems to make the dropout more random. It's not
> a network bandwidth issue - this can happen across a gigabit link.
>
> Using exactly the same computers and headsets but using MicroSIP,
> everything is perfect.
>
> Have tried jitterbuffers, but they don't help (as it's not a delay issue)
> - it really feels like a timing problem going from Verto into the rest of
> the system.
>
> Where should I look now? Have tried 1.10 but no change.
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