As the error says, you shouldn't create a direct feedback loop with signal cords.
I usually use [throw~] and [catch~] for send/receive busses via the rjlib [c_bus], [c_tobus], & [c_frombus] wrappers: https://github.com/rjdj/rjlib <https://github.com/rjdj/rjlib> Additionally, I've made stereo versions ([c_bus2], [c_tobus2], [c_frombus2]) in my own rc-patches: https://github.com/danomatika/rc-patches <https://github.com/danomatika/rc-patches> I suppose we are introducing (tiny) relays with every step, but in practice I have never perceived it. Then again, most of what I do does not relay on "sub-2ms" latency. For a large project at work, we have a signal path with 64 channels using throw~/catch~ like: input/soundfile channel -> spatialization -> virtual speaker -> output. > On Feb 25, 2020, at 9:50 AM, [email protected] wrote: > > Message: 2 > Date: Tue, 25 Feb 2020 03:50:18 -0500 > From: William Huston <[email protected] > <mailto:[email protected]>> > To: Pd-List <[email protected] <mailto:[email protected]>> > Subject: [PD] Delay circuit feedback DSP error-- only when signal path > leaves abstraction > Message-ID: > <CAAV8_8=ui0ov-hi8jboxm4mdp_+u8atbz+uqqnqh9r1bodz...@mail.gmail.com > <mailto:CAAV8_8=ui0ov-hi8jboxm4mdp_+u8atbz+uqqnqh9r1bodz...@mail.gmail.com>> > Content-Type: text/plain; charset="utf-8" > > 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". -------- Dan Wilcox @danomatika <http://twitter.com/danomatika> danomatika.com <http://danomatika.com/> robotcowboy.com <http://robotcowboy.com/>
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