Author Topic: Loophole loFi-looper  (Read 1197 times)

thomasha

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Loophole loFi-looper
« on: October 22, 2023, 05:11:56 AM »
Hi, it has been a long time, but I finished the loophole in a 1590LB box build.
I used the changes I suggested here:
https://www.madbeanpedals.com/forum/index.php?topic=34223.msg328020#msg328020
I used two boards for this build, one for the potentiometers and the LFO and one for the main effect.
While putting it together I noticed that my board layout was not optimal, if you consider the placement of jacks and switches.





Cheers, Thomas

jessenator

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Re: Loophole loFi-looper
« Reply #1 on: October 22, 2023, 09:32:28 AM »
you absolute wizardly madman! Impressive shrinkage you've got going on there. Love the design, too. That's etched, yeah?

jimilee

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Re: Loophole loFi-looper
« Reply #2 on: October 22, 2023, 10:29:05 AM »
Hey Thomas, can you refresh my memory on the loophole?


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thomasha

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Re: Loophole loFi-looper
« Reply #3 on: October 22, 2023, 11:58:04 AM »
Quote
That's etched, yeah?
Yes! And filled with black paint, so that it gives a good contrast.

Quote
Hey Thomas, can you refresh my memory on the loophole?
The loophole follows the same concept of zvex's LoFi loop, using a different answering machine IC.
The PDF I have is from 2015, once there was a board for it, now you can only find it here
https://www.madbeanpedals.com/projects/archives/index.html

Mine follows this modification, which adds the wobbling by oscillating around the supply voltage of the main IC:
I skipped the detune and depth functions, though. 


madbean

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Re: Loophole loFi-looper
« Reply #4 on: October 22, 2023, 01:42:55 PM »
I always meant to get back to this one. I remember I had come up with an idea to do sound on sound / layering. Just never got around to doing anything with it.

Anyway, your build is sick!

nzCdog

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Re: Loophole loFi-looper
« Reply #5 on: October 24, 2023, 03:39:31 AM »
Wow... that's amazing.   :o

gordo

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Re: Loophole loFi-looper
« Reply #6 on: October 24, 2023, 07:32:40 AM »
I have nightmares about these sorts of enclosures...
Gordy Power
How loud is too loud?  What?

Bio77

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Re: Loophole loFi-looper
« Reply #7 on: October 24, 2023, 08:39:46 AM »
<mind blown emoji> 

Are the solder brides on the ISD chip the jumpers on the tagboard layout? 

thomasha

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Re: Loophole loFi-looper
« Reply #8 on: October 24, 2023, 02:56:26 PM »
Quote
Are the solder brides on the ISD chip the jumpers on the tagboard layout?
Yes, the ISD I used is the ISD2560, and it has several pins that are connecter together. Since I used the SMD version, it all got together in a big lump of solder.

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I always meant to get back to this one. I remember I had come up with an idea to do sound on sound / layering. Just never got around to doing anything with it.
I tried something like that when messing with the ISD1720. Unfortunately it had a beep every time the recording restarted. It would require way more switches, though.

JakeFuzz

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Re: Loophole loFi-looper
« Reply #9 on: October 25, 2023, 07:38:28 PM »
Wow that looks great! I cant believe you were able to fit all that in such a small enclosure. Most excellent build.

jimilee

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Re: Loophole loFi-looper
« Reply #10 on: October 26, 2023, 09:50:58 AM »
Wow that looks great! I cant believe you were able to fit all that in such a small enclosure. Most excellent build.
He put a DMM in one of those, Iím sure this was a walk in the park.


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thomasha

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Re: Loophole loFi-looper
« Reply #11 on: November 11, 2023, 07:36:05 AM »
Some late night noodling:


In the video I placed a distortion pedal after the looper, since it filters the high end.
In my opinion, the sound is better when the recording was done with a clean guitar.

nzCdog

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Re: Loophole loFi-looper
« Reply #12 on: November 14, 2023, 01:44:27 PM »
That modulation sounds sweet!