Can Daisy replicate Digitech FreqOut?

[DDad]

I loved my DigiTech FreqOut pedal right up until it died. It's digital, so repair is likely to be replacement and it's out of warranty. I didn't do anything to it, just stopped working one day, so replacement isn't appealing.
Does anyone know if the Daisy platform could be used to replicate the FreqOut's freakishly fantastic feedback fun? If so, how would one go about doing that?

 

[jcpst]

Seems doable. How? Not sure yet. The following is pure speculation. It would take me some iteration to try and find something that imitates it well. Also, I only watched a 1 minute video of this pedal.

We have an onset, I assume it’s controlling the attack on an amplitude envelope, or doing a crossfade. The signal that fades in is pitch-shifted. What’s nice is tracking delay is usually a problem, but less so here I would imagine. There’s almost certainly some eq in play here on the feedback note.

 

[Steve Schulteis]

My first instinct for building a feedback effect would be to run the output of a delay through some kind of filter/gain stage and then blend that with the dry signal before sending it back to the delay input. Tweak the filter and the delay length to adjust the effect. Maybe you use pitch tracking to adjust the filter. Maybe you pitch shift the signal before feeding it back into the delay. Even if I'm off the mark, there might be some interesting effects lurking there.

Supposedly the Freqout is the product of inverting a feedback cancellation algorithm, so that would be a topic worth reading up on as well.