Analogue-sequencer

> > It may work on 6v but I don't think I'd want to try it with mine.

Most of the devices in P3 *should* tolerate 6v, but both CPU types are rated
to 5.5v absolute maximum at their highest clock frequency.
Both CPUs are clocked a bit under their maximum in order to generate
suitable baud rates for midi, so you *might* get away with running them half
a volt over.
But I certainly would not recommend running the supply voltage at any more
than 5.5v

You'd probably find the output voltage from a 6v battery pack would fall
below that voltage pretty quickly in use, but that's no guarantee fresh
batteries wouldn't harm the board.

I'd suggest using a higher voltage battery, and a switch mode regulator for
maximum efficiency.
The 5 volt linear regulator burns off a fair bit of heat in normal use.

You might also reduce power consumption by using larger values of pots.
I originally used 10k, then switched to 4k7 pots to reduce the noise levels
at the ADC input, and minimise ghosting.
Higher values of pots mean more noise at the ADC input.
But the software noise reduction seems to have eliminated ghosting from all
but the dirtiest pots, you might find 47k or even 100k pots could work
reliably now - though I've never tried them.
Obviously 34 4k7 pots are drawing a fair bit of the supply current - about
35mA by my calculation.
If you can get away with 47k pots, that would reduce to under 4mA, and your
batteries would last a lot longer.
You might find you end up haunted though...

Cheers,
Colin f