Analogue-sequencer

> so Colin, we all see the extra space you left in the P3's enclosure.  
> We figured it out, the cat is out of the bag.  So tell us, when is 
> the P3 midi/CV board coming??  There's enough space for 3 or 4 voices 
> worth of jacks out back : )

That's not something I have plans or time to do.
I'd recommend the Oakley midi/poly DAC if you want to do a custom job.

Personally, I like to keep the CV generation separate from the sequencer. I
have fairly limited studio space and there's enough cabling coming out of
the sequencer already.
I've used home-built midi to CV conversion for a long time, but I've only
built a couple of units for other people.
My first CV convertor grew out of the first step-sequencer I built, which
was based on a BBC Micro with 8 CV/gate outputs and a midi interface.
The current source of CV in my studio is my 808/909 clone module, but this
is no longer used for drum sounds since I got the real things, and really
wants to retire.
I had a case all drilled and ready to take a new CV convertor when I got
round to building it, but recently I've been tempted to move away from the
central midi to CV convertor idea, and midi-fy each analogue synth
individually.
This saves the space otherwise occupied by a multi-channel CV convertor, and
means I only have to route a single DIN lead to each synth for control,
instead of maybe a cv, gate, and two or more aux leads.
Plus it's easier to re-patch a midified synth to a different control source
(another sequencer ? surely not ! ;-))
And if a CV convertor breaks down, it only takes out one synth.

First victim of this policy was the 303, which is a special case in that it
really needs an internal midi interface to be able to generate exactly the
right control signals for the anal acid purist (e.g. me), and i wanted midi
output from its internal sequencer.
Next victim has been my minikorg 700s, which makes a very good case for a
custom internal cv convertor board, since its vco input ideally wants a
linear voltage in the 2.5 to 20v range - try getting an off-the shelf CV
convertor to do that.
The minimoog is now the only device attached to the main CV convertor, so
its own dedicated convertor will follow shortly, and if I ever get my
modular re-assembled, it'll get a dedicated midi to CV module with a load of
outputs to be patched as I please.
Putting lots of devices on the same midi bus can lead to timing latency, but
the music I do is pretty minimal, so that's not a major worry. But with a
single midi to CV convertor there would be no way to separate each synth
onto a different midi bus, should a multiple-output sequencer appear
sometime in the distant future...

Cheers,
Colin f