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

Hans-Christoph Steiner hans at eds.org
Tue May 20 21:46:53 CEST 2008

The date matters for the auto-builds.  There were jack-related  
patches checked in on certain dates.


On May 20, 2008, at 5:38 PM, Rich E wrote:

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

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