What up guys,
It's essentially the same as the ZVex LoFi Loop Junky:
http://zvex.com/junky.html
So it's an analog 20 second looper built around the ISDxxx series voice chip.
It also features vibrato sounds through the use of an LFO which drops the voltage to the ISD chip.
(The vibrato feature is what intrigued me to build it in the first place!)
"depth" and "speed" control the vibrato.
I also added a "pitch" control as an alternative to the LFO which drops the voltage by a set amount and results in a detuned sound.
It certainly won't replace my Boss RC 30 but it's definitely got character!
If you're familiar with schematics and want to read about the circuit, it's all explained here:
http://tech.thetonegod.com/payback/payback.html
It was quite a tough build, especially to get the LFO right as the chip doesn't always respond as expected to voltage changes.
That's why it's not fully boxed up yet - still tweaking the LFO values but all works fine ?
I'll post a demo video when time permits, but check YouTube for the ZVex version if interested.
Kind regards,
Matt.
