M65831ap Schematic

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Lynn Hepler

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Aug 4, 2024, 11:47:22 PM8/4/24

to leubrenluchor

Thedigital chip responsible for the sounds is Mitsubishi M65831AP. Like many other Mitsubishi chips utilized by Ibanez, this one is too one of those you may find in many karaoke devices. The dual opamps used for buffering and mixing are C4570C, which are not your average choice, but they do perform quite well in this circuit. The schematic for the effect is up at Free Info Society.

How does it sound?

Like an angry tape echo unit gone slightly mad with the tightness. The sound is without a doubt one of the best digital tape echo emulators of its day and it has not been killed by time, not even now. It has tightness that sounds personal. Nice collectible, and most of all, usable unit.

Generally, I have to say this is a really great website, very enjoyable, and I would agree with your tone analysis at least 95% of the time, at least as far as effects pedals I have actually played, which is nowhere near as many as you have, of course.

Test was successful so I drawn schematics and route them to a PCB layout trying to keep same dimensions of original part.This is the final result of a populated PCB (note the use of CMOS logics on it)

All these projects were born as personal.We would have no problem to make them public, the big problem is there are people out there ready to take advantage of it to make profit.Said that, I have some unit left that I could sell.