Hi William,

I second IOhannes and Alex that it's better to attach actual patches, but from looking at the picture it seems like you attempt to do your "external" feedback path via signal connections and this obviously doesn't work because it creates a DSP loop. The workaround is to use a pair of [s~]/[r~] for one side of the aux path, which "breaks" the DSP graph. Note that in your "inner" feedback path you're already doing this, that's why you don't get a DSP loop there.

Note that [s~]/[r~] is basically a delay line of a single block, unless you force the order with signal connections, see "3.audio.examples/G05.execution.order"

Christof

Hi, I've built a classic stereo delay using [delwrite~] and [vd~], and L/R crossed feedback. This works!

Now, I want to insert an effect into the feedback path. (many possibilities here: add some bitcrush, so each repeat gradually becomes more distorted.... or a [hilbert~] type pitch shift, which might create something like Shepard tones, etc).

This works when everything is within a single patch or abstraction.

However, when I try to allow the effect to be external to the abstraction (like a SEND/RETURN insert on a mixer), when I try to complete the circuit, I get "DSP loop detected".

The two circuits are essentially IDENTICAL!

This seems like a bug to me. Any ideas?

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).

Thanks!

BH

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