[sdiy] Paia MV-8 MIDI CV Processor request for info

[megaohm]

I MV-8 may be a different version. From the little amount of info I have
found, these models were produced around 1993 or 1994. I think this may have
been purchased assembled by Paia. It has an 8 position DIP switch labelled
'mode/channel', a 'mode/aux' switch, 8 rca cv outputs, 8 cv inputs, 8 gate
outputs, and 8 gate inputs. It's a MIDI to CV and a CV to MIDI...at least
that's what it looks to be. I'm only reluctant to fire it up because I'm not
sure how to test it's functionality. I'll experiment a little this weekend
and get some photos up.

Thanks for the response, Dave. Perhaps these different models share a lot of
similarities. If so, I'll try some of the mods.

  I contacted Paia so hopfully they will have some documentation for me
soon.


peng


On 3/10/06, Dave Kendall <davekendall at ntlworld.com> wrote:
>
> Hi.
>
> I built a MIDI2CV8 a while back, and have been pleased with it. I can
> recommend adding a few additional circuits on a bit of perfboard though.
>
> The pitch wheel centres at +5V (+5.33V on my board), with 0V at the bottom
> and just over 10V at the top. It's well worth fitting an offset /scaler
> circuit on the PB output, so that 0V is the "off" or centre position.
> All of the continuous controller outputs are stepped, or "zippery" if left
> with 0  to  +10V range. There is a little diagram in the Paia construction
> manual showing how to get the pitch bend range down to a more musically
> useful range - doing this removes perceivable zipper noise. I wired my PB
> output to one sub-circuit giving a fixed ±2 semitones, and to another one
> with a pot for range, with a DPDT switch selecting between the two. Both had
> the offset set with multiturn trimmers.
>
> To get rid of zipper noise on the other CV outputs (e.g. in mode 1 you
> have Mod Wheel and  Aftertouch CVs), use a simple lag circuit on the output
> of each, with the rate set so that when controlling, say, VCF cutoff, there
> is no audible zippering, but it has an acceptable control response. In
> practice, the slight control lag hasn't been a problem.
>
> It might be worth replacing the DAC trimmer with a multi-turn one,
> although fitting it to the board might be tricky for space/footprint
> reasons.
>
> cheers,
>
>
> Dave
>
>
>
>
>
> on 9/3/06 22:07, megaohm at megaohm1 at gmail.com wrote:
>
> Hi,
>
> I just picked up a Paia MV-8 and I'm looking for documentation,
> schematics, any info, tips , and/or links. Any and all help will be greatly
> appreciated.
>
>
> Thanks,
> peng
>
>
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