Delay Feedback Loop

Anyone have any luck setting up a delay feedback loop as described in this article from Sound on Sound

I will try this tonight with my tape echo! :D

I also have an analog delay from Moog and I can route the delay loop to other effects and send it back, but this is something different and definitely worth a (room) shot. B)
Seems like King Jammy does the same in this video:

I’ve tried it in Renoise but they are right, you’re better of doing this on an analog board. When cranking up the feedback you also hear a lot of digital interference (and I work on 96KHz/24bit).
Perhaps I can try it with my monitor out on my mixer as I don’t have auxiliaries or send channels but I’ll do that tomorrow. :)

Thanx Maskin…
that echo at 00:15 in the King Jammy youtube u posted is what I’m after.
I can fudge it with a filter and tweaking the cutoff and resonance… but not quite the same -
looking fwd to your further experiments!

you can do this relatively easy with mda’s dubdelay:

it does get itself very cpu intensive for me though.
though this is definitely something analog circuits do best.


there is a dsp chain labeled dubby by mmd (mr mark dollin?).
i really prefer the internal renoise effects, yet, i think i am not feeding it everything it needs.

i’ve been trying to get this Scientist echo:

and this Amazon II echo:

Ok, I’ve tried it with the loop routing on my analog delay and it works great! :D
Only difference is that the sound is getting dull instead of brighter but this has to do with the analog circuitry, with a tape echo it should have the same effect as in King Jammy’s video. I will try that now. :)

Even when routing the monitor out signal back into my audio interface causes digital interference, so the entire setup has to be analog to recreate this effect.
However, the feedback on my tape echo creates the effect with ease:

The advantage of the specific feedback loop is that you can control the amount of feedback directly with the mixer as the routing itself is identical to the routing on most machines that use feedback (reverbs/echoes, phasers, etc.).

Looks like you have to buy yourself a proper tape echo. ;)

Using ubuntu studio, its quite easy, using jack and the jack rack

In renoise, i added some extra audio outputs to use for outputting to the delay.

On mixer track one i added a send to go to so1.
so1 is set to output to the extra outputs i added

On track 9 (or any empty track) i added (dsp…) line in device, a gainer and a maximizer (maximizer will stop you blowing your eardrums or speakers and maybe even burning your face if you turn down the threshold)
(the gainer will allow for easy positive feedback amount thats essential) At the end of this chain i added a send device routed to so1, tying up renoises end of the loop.

In the Jackrack i added a delay effect. Reverb would probably sound swell too :D
I connected in ‘Jackcontrol’ its outputs and inputs to the relevant places on renoise(outputs2 and the line in)

After pressing play on a bass note and twiddling with effects setttings and send ammounts, it was feeding back on itself. Dragging on delay times bends the feedback note.
Of course… i should be using less feedback for a dub reggae effect…

To make it sound more like an analogue device, an old trick is to make a sample from recording of eating some crunchy foodstuffs and play it back into the mix at a low level. I have found Salt and vinegar to be the best flavour.

Also… in the above method you dont really need to use the jackrack as you can just route renoises outputs to its inputs in Jackcontrol, using just renoises fx- although doing it this way had excessive feedback on the left channel for some reason i dont know.

Have fun breaking trying not to break your speakers… id keep one hand on you master fader/power socket :yeah: