[PD] FM problems

[Matthew Allen]

[z~ 1] 


z~ is an object from the zexy which I have used extensively in my FM patches
for this reason. It allows you to define a delay in terms of samples not
milliseconds. So the above object would delay the incoming signal by a
single sample. This gives you much more predictable results than delaying
the signal by a millisecond (441 samples) which at higher frequencys could
be the entire period of your waveform.

m.

> -----Original Message-----
> From: matthijs at devdsp.net [mailto:matthijs at devdsp.net]
> Sent: Thursday, July 17, 2003 6:58 AM
> To: pd-list at iem.kug.ac.at
> Subject: [PD] FM problems
> 
> Hi list,
> 
> I was wondering if one of you could help me with a patch I'm working on:
> 
> The patch (see attachment) attempts to implement a phase oscillation
> instrument with feedback. The output of a phasor~ (the carrier) is added
> to the output of an osc~ (the modulator) and the combined result is fed
> into a cos~ object.
> 
> This works perfectly.
> 
> However, when I try to feed the output of the cos~ object, multiplied by
> some value between 0 and 1, back into the chain somewhere and turn on
> audio processing, PD immediately segfaults ("Consistency check failed:
> signal_free").
> 
> So I guess I can't do this. Can anyone explain which obvious mistake I'm
> making here?
> 
> 
> --
> take care,
> 
> Matthijs de Jonge
> http://devdsp.net - news and resources for computer musicians