I accidentally trashed his little brother, the MT-120!
I also managed to kick a Casiotone 6000 into serious bend territory (like it was churning out random sounds) without opening her up, I just demanded too many things from her at once!
I just finished a really satisfying job on one of these. I hooked up a 16 point patch bay to the largest chip this afternoon and am currently learning my way around the instrument. I'll post some samples soon.
This was the first machine I bent but I haven't used it for a couple of years since it no longer works. I only wired up push to make switches for the bends and pressed them and held them randomly whilst playing the demo or accompaniment - this produced the best results. There is a classic sound that these things produce, as does the MT-240 which to me sounds a bit like someone saying "ACID", but sometimes you can get 3 or four minutes of mutating madness - not like anything I have ever heard! Its a favourite of mine!
So I cracked this guy back open recently and made some happy advances. The major thing was installing a pot into the patch bay. For anyone who hasn't done this before, it is a simple and excellent way to vary your bends. If your patch bay goes as such * * * * * * * * * * * * * * * *
put a pot between the two rows like this: * * * * * * * * * -----center lug *--------either outside lug * * * * * * * * So then, rather than connecting directly from one point to another, you can patch through the pot.
Anyway, with the MT-140 I found that I got best results by using a 2k pot (cause that was the smallest I had on hand) with 30 ohms in parallel.