[Jackaudio] Glitches when adding connections

[Patrick Pouget]

If you are using 192K sample rate, 32 bits, 32 channels is a 197Mhz
bandwidth. It is not that low. Correct me if I am wrong, netjack is
TCP/IP, not AVB?  transmiting at 20% of the maximum is subject to some
care as the TCP/IP does not have clean priority management. Are you
using the switch for other computers? do you send more data (especially
when connect and siconnect)? is it a cheap switch (which run as "store
and forward")?
If you are ready to sacrify a cable (or buy the sortest in the same
serie), cut it and check if the pairs are separated by a metalic sheet
to each other (+ the general rfi propection). Crosstalks can generate
retries.



On Mon, 2023-01-02 at 17:47 +0100, johannphilippe at lilo.org wrote:
> The connection was made with GB ethernet switch (though, I'm not
> completely sure of the speed of RJ45 cables I used),  so I don't
> think it's a bandwith limitation. 
> It was fixed my setting latency to 1 (instead of 5 by default). 
> 
> --
> Johann PHILIPPE
> Electroacoustic composer & computer music designer
> +33 6 77 20 98 41
> 
> 
> > From: Mike Uchima <uchima at pobox.com>
> > To: jackaudio at lists.linuxaudio.org
> > Subject: Re: [Jackaudio] Glitches when adding connections
> > Date: 31/12/2022 17:02:46 Europe/Paris
> > 
> > What is the bit depth and sample rate? What is the nature of the
> > network 
> > connection you are using? If you are using an older WiFi or USB 2.0
> > network adapter, you might be hitting network bandwidth
> > limitations.
> > 
> > == Mike Uchima == uchima at pobox.com ==
> > 
> > On 12/31/22 09:29 AM, johannphilippe at lilo.org wrote:
> > > Sorry, I thought about testing this after sending the mail :
> > finally 
> > > tested same configuration locally (connecting 32 channels from a 
> > > software to Reaper on the same machine) and it works fine.
> > Totally 
> > > NetJack related it seems. Any idea on how to improve/configure ?
> > > Thanks
> > > 
> > > --
> > > Johann PHILIPPE
> > > Electroacoustic composer & computer music designer
> > > +33 6 77 20 98 41
> > > 
> > > 
> > >> From: johannphilippe at lilo.org
> > >> To: jackaudio at lists.linuxaudio.org
> > >> Subject: [Jackaudio] Glitches when adding connections
> > >> Date: 31/12/2022 16:19:48 Europe/Paris
> > >>
> > >> Dear list,
> > >>
> > >> I'm doing some experiments to use Jack and NetJack to connect
> > several 
> > >> machines. Here I'm using two Linux machines : a debian as client
> > and 
> > >> mint 20 as server (sorry I'm not confortable with the "master"
> > "slave" 
> > >> keywords in this context).
> > >>
> > >> I'm sending 32 channels from client to server. By the way, this
> > works 
> > >> great and is very intuitive.
> > >> Though, for some reason, when I connect these inputs to
> > something 
> > >> (here to Reaper), audio is great until I connect the 26th input
> > to 
> > >> Reaper. Then it starts glitching (sounds like interruption) and
> > gets 
> > >> worst if I keep increasing the number of connections. If I
> > remove 
> > >> connections to keep it less than 26, it sounds ok. Never had
> > this 
> > >> problem before.
> > >> Is it likely related to NetJack ? Or does it sounds like a pure
> > Jack 
> > >> issue ?
> > >>
> > >> Thanks for any help or advice
> > >>
> > >> Regards
> > >>
> > >> --
> > >> Johann PHILIPPE
> > >> Electroacoustic composer & computer music designer
> > >> +33 6 77 20 98 41
> > >>
> > >> _______________________________________________
> > >> JackAudio mailing list
> > >> JackAudio at lists.linuxaudio.org
> > >> https://lists.linuxaudio.org/listinfo/jackaudio 
> > >> <https://lists.linuxaudio.org/listinfo/jackaudio>
> > > 
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