[sdiy] Matrix keyboard idea

[harry]

I think you (all) might want a wiard/blacet MiniWave...

It does this sort of thing... but its 8 bit. You 'could' hack it if you like.
Its has 16 banks of 16x256 wave tables

H^) harry

"Byron G. Jacquot" wrote:

> >My take (I'm hardware..) would be to co Midi to CV convert, then build a
> special
> >
> >quantizer, with an extra "bit" that would be a controllable GATE output.  So
> >lets
> >say 64 notes come in (thats 6 bits)...  You convert the same 6 bit number that
> >corresponds to note, into a 1 of 64 output decoder, and 64 switches. You enable
> >the
> >gate to the synth via switches that are closed.  You could control two synths
> >this way with a second bank of switches...
> >
> >I'd have to give lots of thought to the matrix deal, I don't think it would
> help
> >much.
> >The hardware would get very complex to control all the switches. Maybe no
> >benefit.
>
> Things might get interesting if you put a ROM in there.  Address it with
> those 6 bits, and use the data outputs to the 1 of 64 decoder.  With an
> N-address by 8-bit ROM, you could have 2 bits left over after the 6 to use
> for gates & stuff too.  You could build all sorts of crazy sets of
> translations into an EEPROM, and use the higher address lines to select
> between them.  A 32 K EEPROM would give you 512 possible 64 byte tables.
>
> Things could get even crazier if you cascaded several EEPROMs this way,
> daisychaining the data outs of one to the address ins of the next!
>
> Of course it might not be too easy to do real-time changes to the data in
> the ROM, but with that many tables, you could surely work around it.
>
> It's also worth mentioning that the old MUSE hardware sequencer is somewhat
> related to these ideas, where the "next state" logic was controllable and
> tweakable on the fly.  Hal Chamberlin's Musical Applications Of
> Microprocessors goes into details.
>
> Byron Jacquot