[PD] wierd feedback popping with pd/freebob/jack/rt

Rich E reakinator at gmail.com
Tue May 20 17:38:29 CEST 2008

Currently, Pd-0.40.3-extended from the autobuiilds.  While I think this is
occurring on every version on Pd I have tried since I installed Hardy (which
is alot), I should do some testing to verify that.

Another thing; opening Audacity only cures things for a bit, until I do
something like open another patch in pd.  Then, the glitch happens again, I
restart audacity, and it goes away.

I'll try some testing on 0.39 - .41 vanilla when I have a moment.


On Tue, May 20, 2008 at 7:59 AM, Hans-Christoph Steiner <hans at eds.org>

> Which version of Pd is this?  There are large differences, so you need to
> be specific.
> .hc
> On May 20, 2008, at 2:15 PM, Rich E wrote:
> Hi,
> I have been having this problem off and on for a while, but never thought
> it would do any good to post on this forum about it.  However, I have a lead
> now.
> I have an Edirol FA-101 hooked up to pd in Ubuntu Gutsy, with the rt
> kernel.  If pd is running by itself, everything sounds great.  If jack is
> running in non-realtime and there are lots of things going on, everything
> sounds great except there are big pauses in midi/audio throughput.  If jack
> is running in realtime everything BUT pd sounds great, while pd produces
> feint pops, with feedback.
> And what I just noticed today, if I start another JACK application
> afterwards, the pops go away and everything is runnnig smooth in realtime.
> I don't know if it is just any application, but what I am explaining
> happened when I opened audacity to try to record the output of pd's
> wierdness.
> I've only had this issue with pd.  Does this make sense to anyone?
> -rich
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