[PD] Delay circuit feedback DSP error-- only when signal path leaves abstraction

[Dan Wilcox]

As far as I recall, going between abstraction to parent patch via inlet~/outlet~ introduces a block delay, hence no error

> Third patch is like the second, only the effect has been moved out of the abstraction, and into the parent patch. ONLY HERE do I get the DSP loop error. 

Signal loop in a single patch without abstractions = error. Pd has no way to read and write to the same signal buffer in the patch at the same time *without* some tiny delay.

> The point is the last two patches have (or should have) an identical graph! 

At the lower level, they don't. What happens if you put part of the path inside a subpath which uses inlet~/outlet~?

> On Feb 25, 2020, at 11:36 AM, William Huston <williamahuston at gmail.com> wrote:
> 
> First abstraction, simple stereo delay:  2 delay lines, variable feedback L->R, R->L.
>  This works, no DSP loop error. 
> 
> Second abstraction contains an effect in the feedback path. (in my simple example, it's just a null wire: In-L passes to Out-L, etc). Again this works, no DSP error. 
> 
> Third patch is like the second, only the effect has been moved out of the abstraction, and into the parent patch. ONLY HERE do I get the DSP loop error. 
> 
> The point is the last two patches have (or should have) an identical graph! 
> 
> It really seems like a bug to me. 
> 
> I'll upload a test patch a little later. 
> 
> Thanks, 
> BH

--------
Dan Wilcox
@danomatika <http://twitter.com/danomatika>
danomatika.com <http://danomatika.com/>
robotcowboy.com <http://robotcowboy.com/>



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