[sdiy] Matrix-12

[ASSI]

[I had asked this on the matrixSynth group, but did not get many 
replies. (Hi Scott!) I'm asking again here in the hope to get a few 
more answers.]

On Monday 09 December 2002 22:55, ASSI wrote:
> 1. The Matrix-12 is from 1985 and apparently without the Aftertouch.
> If anyone is familiar with the Aftertouch retrofit, I'd like to know
> if it can be replaced by a contemporary unit, like the ones found in,
> say Fatar keyboards. Also I've read that it is possible to replace
> the keyboard assembly by a Kurzweil K2000 one or a Roland (not sure
> which). If anyone has information about the keyboard encoding and
> other details, I'd like to know. If anyone has a current email
> address for a guy named Keith Sterling (who did even more mods to his
> Matrix-12), I should also be very interested.

It turns out it really is without the Aftertouch option, and has a 
preliminary manual that says I can get a retrofit at no charge in 
spring 1985. It also has a registration card to order the final manual. 
I suppose both vouchers are not valid anymore unfortunately. Again, I'd 
be willing to change the keyboard assembly myself if someone could tell 
me which type of keyboard works and what, if any, adaptations need to 
be done to connect it to the Matrix-12.

Also, is there any place where I could get the final manual from?

> 2. The voice version is 1.4 while the latest version is supposedly
> 1.6. Where to get 1.6 EPROMS or just the hexdumps (I can burn them
> myself, thanks)? What are the fixes/changes from 1.4 to 1.6?

Didn't get any answers on that one, so I'll ask again. I need either 
the EPROMS or the data to burn them myself.

> 3. One of the encoders is slightly misbehaving, it still works and
> may just need some cleaning or mechanical adjustment. But if it needs
> to be replaced, does anyone have a source or part number for these?
>
> 4. Just found schematics and manual for an External In mod. Looks
> quite interesting and if anyone has done this to the Xpander or a
> Matrix-12, I'd like to hear from you.

5. What are the RAM backup batteries inside the Matrix-12 and how often 
should they be changed? I'm not so much worried about losing the data 
as I am about getting a leak. It appears that the original battery is 
still in there...

Additionally, the mains transformer hums badly. Anyone knows if I can 
get a replacement power supply or what are the specs for it?


Achim.
-- +<[ Q+ & Matrix-12 & WAVE#46 & microQkb Omega sonic heaven ]>+ --

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