Korg Poly800/EX800 Users

dave han wrote:
> 
> How would you sync it with a 606? any ideas?
> 

You'd need something to convert Roland DIN Sync to MIDI, or the other 
way round.

Now, this is probably easier than it sounds.  There are lots of little 
microcontrollers on the market with a UART and various I/O pins.  If you 
wanted to use the 606 as master, you'd set the microcontroller up so 
that the clock pin fired an interrupt, which would set a MIDI Clock byte 
  (0xf8) out through the UART.  Another line would be wired to the 
start/stop line.  When it goes high, send the start message (0xfa) and 
when it goes low send... can you guess?  The stop message (0xfc).

Slightly more useful would be receiving the MIDI bytes, pulsing the 
clock output pin when 0xf8 is received, and setting or resetting the 
start/stop pin when 0xfa or 0xfc is received.  It might be worth 
including 0xfb for continue, but I don't think the 606 supports that.

Note that since MIDI Clock is sent at 24ppqn (pulses per quarter note) 
you could count pulses and toggle other pins to send clocks at different 
rates - for instance an arpeggiator trigger that sent semiquavers would 
require six counts, quavers 12 and crotchets would need 24.  For other 
note lengths you could count different amounts - 18 would be a dotted 
quaver.

I really don't have time to come up with a hardware design or actually 
write the code for this right now, but a bit of googling should turn up 
some good places to start.  If anyone fancies a challenge I'll be glad 
to help out.

Gordon