2 Feedback Loop questions

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iPerson
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2 Feedback Loop questions

Post by iPerson » Mon Sep 17, 2018 3:41 pm

1.) Is there any possible (and relatively inexpensive way) to insert a guitar into a feedback loop, so that the notes I play gets are part of the feedback loop too?....I was thinking either a Boss Line Selector LS-2 or even a Boss Vocoder? Any thoughts? Anyone ever do anything like this?
2.) So earlier today I was making a feedback loop with a custom fuzz pedal, and it wasn't too noisey, but all of a sudden I started hearing (from the amp) the faint sounds of people talking amidst the static - I think it was radio chatter....Anyone else have this happen to them? And where the hell is the noise coming from?.....Just curious.

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crochambeau
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Re: 2 Feedback Loop questions

Post by crochambeau » Mon Sep 17, 2018 5:50 pm

Anything with multiple inputs and a single output (like a mixer) can integrate a guitar into a loop.

You were probably hearing AM radio from the fuzz. It's not uncommon to pick up radio with high gain circuits. It also may not have been too noisy because a lot of fuzz circuits invert the signal from input to output, so over all you'd be subtracting the effect from the loop...

Schematics can indicate if my latter sentence may be at play here.

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WhiteWarlock
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Re: 2 Feedback Loop questions

Post by WhiteWarlock » Mon Sep 17, 2018 7:08 pm

Where is XDUGEF with those Y cables?!

iPerson
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Re: 2 Feedback Loop questions

Post by iPerson » Tue Sep 18, 2018 9:42 am

Any recommendations for cheap(ish) Mixers? I was thinking of getting a DOD 240 Resistance Mixer.

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crochambeau
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Re: 2 Feedback Loop questions

Post by crochambeau » Tue Sep 18, 2018 9:50 am

A small resistive mixer should work fine, you'll probably want to run your guitar through some pedal that provides enough boost so you're in in the same general range as the feedback loop.

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WhiteWarlock
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Re: 2 Feedback Loop questions

Post by WhiteWarlock » Tue Sep 18, 2018 9:52 am

you can make simple device with 3x 1/4" jacks
basically designing Y
or even hacking together old 1/4" cables
that will get you there
or even some pedal in chain that has stable panned stereo output
put it at end of chain then use each of the stereo outputs for different inputs

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crochambeau
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Re: 2 Feedback Loop questions

Post by crochambeau » Tue Sep 18, 2018 11:18 am

I feel obligated to maintain my stick in the mud status and mention that the Y cable approach does not always work.

Feel free to ridicule my EE chops, but I have builds that object to having their multiple outputs strapped directly into each other while they operate as designed with summing resistors combining the signals.

So, yeah, Y cables blah blah blah... but if it doesn't work the summing resistance inside the 240 (or most any other passive mixer) should set you straight.

It may also be important to *not* hook a passive pickup on the same "Y" as an active output device, so the preceding recommendation of having a pedal between the guitar and loop is even more important.

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WhiteWarlock
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Re: 2 Feedback Loop questions

Post by WhiteWarlock » Tue Sep 18, 2018 12:39 pm

yes... same is true with unbuffered multiples "sometimes"... opamps are your fiends
there is a chance he can get desired function with Y
in the desired config
yet he may need driving it some with boosted gain
Eye actually have 1/4" 1to2 and/or 2to1 Y audio adapters
they work for me in modular synth applications

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timdrage
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Re: 2 Feedback Loop questions

Post by timdrage » Wed Sep 19, 2018 1:51 am

in my experience the radio picked up by fuzz pedals always seems to be Christian radio for some reason :evil:

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Fletcher
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Re: 2 Feedback Loop questions

Post by Fletcher » Wed Sep 19, 2018 2:12 am

Image

JPTR feedback fucker - I managed to pick one up relatively cheap 2nd hand.

4 no. 1/4" jacks which you would set up as :-

Left / Right
Loop out - Fuzz - Loop In
Output - Guitar In

Then a dial for blending quantity of feedback.

If you want something in a neat box then this should do the trick.
www.snarerush.co.uk
An electronic music zine in occasional print format

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crochambeau
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Re: 2 Feedback Loop questions

Post by crochambeau » Wed Sep 19, 2018 5:42 am

timdrage wrote:
Wed Sep 19, 2018 1:51 am
in my experience the radio picked up by fuzz pedals always seems to be Christian radio for some reason :evil:
Same. I use that as inspiration to shield RF at all costs.

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amishrobots
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Re: 2 Feedback Loop questions

Post by amishrobots » Wed Sep 26, 2018 11:34 pm

timdrage wrote:
Wed Sep 19, 2018 1:51 am
in my experience the radio picked up by fuzz pedals always seems to be Christian radio for some reason :evil:
Makes sense, christianity is just primitive distortion feeding back on itself, so it would be on that same frequency.

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amishrobots
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Re: 2 Feedback Loop questions

Post by amishrobots » Wed Sep 26, 2018 11:38 pm

amishrobots wrote:
Wed Sep 26, 2018 11:34 pm
timdrage wrote:
Wed Sep 19, 2018 1:51 am
in my experience the radio picked up by fuzz pedals always seems to be Christian radio for some reason :evil:
Makes sense, christian radio is just primitive distortion feeding back on itself, so it would be on that same frequency.

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Fletcher
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Re: 2 Feedback Loop questions

Post by Fletcher » Thu Sep 27, 2018 1:49 am

amishrobots wrote:
Wed Sep 26, 2018 11:38 pm
amishrobots wrote:
Wed Sep 26, 2018 11:34 pm
timdrage wrote:
Wed Sep 19, 2018 1:51 am
in my experience the radio picked up by fuzz pedals always seems to be Christian radio for some reason :evil:
Makes sense, christian radio is just primitive distortion feeding back on itself, so it would be on that same frequency.
www.snarerush.co.uk
An electronic music zine in occasional print format

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