Assuming you are Ubuntu ... are you using the realtime kernel?  In Hardy at least, I get smooth pd audio with
realtime jack and dropouts when using the same with the regular kernel.  It seems the realtime kernel is *too* agressive for my laptop ... ?

On Thu, 2008-10-30 at 16:21 +0000, forwind wrote: 
>> you can tell qjackctl to start jack with realtime priority

I was running jackd through qjackctrl with realtime priorities. That
didn't make a difference.

On Thu, 2008-10-30 at 17:08 +0100, IOhannes m zmoelnig wrote:
> forwind wrote:
> > Hi Derek,
> > 
> >> Did you try running as sudo or root?
> > 
> > Of course! Just tried this and yes no clicks!!!
> > 
> > Before I was using qjack ctrl to control jackd. What is strange is that
> > when I run jackd from command line without sudo privileges there are no
> > clicks either !? 
> 
> you can tell qjackctl to start jack with realtime priority
> 
> fgmasdr
> IOhannes
---
Dan Wilcox
robotcowboy.com