This is a guitar loop pedal that records short passages played on an instrument and plays them back in a repeating loop.

 

And it is analog! The signal-to-noise ratio is not that good, but the sound is thicker than any digital alternative can provide.

 

The only pedal on market that uses similar technology is Zvex Lo-Fi Loop Junky.

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These are diy projects our looper is based upon: Madbean Loophole and Dean Hazelwnter's Mobius Trip Looper.

 

The circuit is based on ISD1020 chip.

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The supplier for these analog recording chips is a company called Nuvoton. According to their datasheets, the chips use some kind of patented flash memory that can store sound without digital conversion.

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The recording time is 20 sec.

​No multiple loops available.

 

The controls are:​

1) Rec knob – recording volume;

​2) Play knob – playback volume;

​3) Dry knob – volume of the instrument that is played over a recorded loop;

​4) Two footswitches – one for recording, one for playback;

​5) Internal trimpot - controls a low pass filter that filters out some of the unwanted noise.

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