Sorry about the complexity. I am attaching 2 new files (as simple as possible illustrating the point). I think it is normal PD behavior just to turn off the audio stream when you try and connect a straight audio feedback loop (which is why i was suprised you were getting PD to crash, I didnt really think it was a bad loop). NoWorks.pd is basically a straight feedback loop, it just stops producing audio when I connect it.
Works.pd is even more interesting. Not using z~ or a delay (straight connections with z~ doesn't seem to work either) instead I am using a throw~/catch~ pair. And this seems to work. In fact any time I try doing a feedback loop with connections I get the audio shutting off, but if I use a throw~ or send~ i am fine. My assumption here is that both of the remote sending objects have a 1 sample delay?
either way it should help you come up with an acceptable solution to you problem.
-----Original Message----- From: matthijs@devdsp.net To: Matthew Allen Cc: 'pd-list@iem.kug.ac.at ' Sent: 7/18/2003 1:13 PM Subject: Re: [PD] FM problems
On Fri, Jul 18, 2003 at 09:49:38AM -0700, Matthew Allen wrote:
To the original poster I have attached my work in progress 3-op FM
synth.
Its uses z~ to give the users the ability to feedback any of the
operators
to any other operator (including self feedback). You'll need Zexy of
course
and IEMlibs for the interface.
Thanks a lot - it's *way* too complex for my meagre skills to comprehend, but I'll definitely study it.
But I think I messed up somewhere else as well, because when I was preparing a simple example patch to share with the list that was basically nothing more than the output of a phasor~ and the output of an osc~ added together feeding into cos~ and the output of that manipulating the frequency of the osc~ object, PD no longer segfaulted. Nor did it output sound, but at least this shows there's something else going on.
My Apologies to Miller for stealing the basics from his docs, and also
to
Native instruments for stealing their idea for the Operator matrix. I
have
been programming fm synths since the SY77 came out and I was amazed
when I
first saw this implemented. It just makes sense.
The patch itself is still in pre-alpha. The synthesis works, I'm just working on an interface. Use the bang in the upper left to send note
and
velocity info (unless you have a midi keyboard, then just play the keyboard). I have some random pitch stuff going on so don't thik that
that
is broken, just look in [PD FM_Pitch]. Make sure and set both the feedback/output matrix and the envelopes under them.
m.