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    <p>Hi William,</p>
    <p>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.<br>
    </p>
    <p> 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"</p>
    <p>Christof<br>
    </p>
    <div class="moz-cite-prefix">On 25.02.2020 09:50, William Huston
      wrote:<br>
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cite="mid:CAAV8_8=Ui0oV-Hi8jBoxM4MDp_+u8atbZ+uQqNQh9R1BODzczQ@mail.gmail.com">
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          <p>Hi, I've built a classic stereo delay using [delwrite~] and
            [vd~], and L/R crossed feedback. This works! </p>
          <p> 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).</p>
          <p> <b>This works when everything is within a single patch or
              abstraction. </b></p>
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            <p> 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". <br>
              <br>
              The two circuits are essentially IDENTICAL! <br>
            </p>
            <p> This seems like a bug to me. Any ideas? </p>
            <p> 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). </p>
            <p> Thanks!</p>
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          BH</div>
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