I couldn't find it in the picture, but I didn't look carefully and I agree it'd be better if we had the patch to open. Nonetheless, I strongly doubt there's a bug. The "DSP loop detected" error is pretty straight forward and tells you have made a feedback signal connection, where an output is connected to an input earlier in the chain, and this is bad.

For reference: https://github.com/porres/Live-Electronics-Tutorial/blob/v1.0-beta-17/Examples/Vol.1/Introduction-Pd.Quickstart/4.Audio.in.Pd/3.DSP.Loop.pd

Anyway, this is happening somewhere in the patch, maybe if you send us it, someone will help you find out how it's happening.

Em ter., 25 de fev. de 2020 às 06:15, IOhannes m zmoelnig <zmoelnig@iem.at> escreveu:

On 25.02.20 09:50, William Huston wrote:
> I've attached pix of both the high-level schematic, along with a demo
> patch. (I can upload the actual patch if that would be helpful).

please don't post screenshots of Pd-patches.
post Pd-patches instead, they are much smaller (being text only) and are
actually of *use* to those who might want to give your problem a glance.

fgamsdr
IOhannes

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