[PD] glitches when streaming UDP

Dan Wilcox danomatika at gmail.com
Tue Jan 30 16:38:07 CET 2018

Is it running with the *same* OS and settings? It might be a scheduling issue with the kernel, realtime settings, crappy networking driver, etc. 

> On Jan 30, 2018, at 12:00 PM, pd-list-request at lists.iem.at wrote:
> From: Roman Haefeli <reduzent at gmail.com <mailto:reduzent at gmail.com>>
> To: "pd-list at lists.iem.at <mailto:pd-list at lists.iem.at>" <pd-list at lists.iem.at <mailto:pd-list at lists.iem.at>>
> Subject: Re: [PD] glitches when streaming UDP
> Message-ID: <1517306864.2068.8.camel at gmail.com <mailto:1517306864.2068.8.camel at gmail.com>>
> Content-Type: text/plain; charset="utf-8"
> On Mon, 2018-01-29 at 10:25 +0100, Roman Haefeli wrote:
>> I'm working on a patch that transmits audio through UDP. The patch
>> runs
>> totally smooth on macOS (10.10 and 10.11) with Pd 0.48-1 and JACK as
>> back-end. On the Linux machines I tested (all Ubuntu 16.04) with the
>> same version of Pd I get a lot of glitches, although I'm using very
>> similar Jack settings (128 frames/period, 3 periods).
> Update:
> My personal, somewhat outdated laptop from 2007 has absolutely stable
> performance with same patch, same Pd version, same OS, same kernel. To
> be clear: It's only Pd that performs well on one computer and not so
> well on others. I get glitch-free audio with Ardour on all tested
> computers. So I wonder what circumstances affect specifically Pd. It's
> a pity the most powerful computer I have access to is in its current
> state not suitable for Pd projects :-(
> Roman 

Dan Wilcox
@danomatika <http://twitter.com/danomatika>
danomatika.com <http://danomatika.com/>
robotcowboy.com <http://robotcowboy.com/>

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