--- In Doepfer_a100@y..., "Joe Buechler" <buechlerjoe@t...> wrote:

> Okay, I think the A154 as currently proposed doesn't do variable

step

> length and midi sync at the same time, I believe the clock input

jack

> shorts out the clock generator.

hi Joe, judging by the A190 manual, the A190 already has a divisor
built in and it also reponds to Program Change n. the chart is also
there at this url.

http://www.doepfer.de/a100_man/a190_man.htm

logically speaking, the A190 sends out a 50% PW duty cycle. the step
time would be based on the divisor you set the A190 to be at. so the
A154 would probably accept the duty cycle as is. now the Variable
pulse shaper on the A154 would shape the A190 pulse cycle plus or
minus from its 50% PW duty cycle. once it is shaped manually or by
voltage control, the newly shaped pulse cycle, which is the same
length as the A190 50% pulse duty but with a different pulse shape,
would clock the A155's thru the buss connectors.

>
> Now I'm back to thinking about buying an A163 VC divider for to get
> variable step length with midi sync. But ringmod's question got me
> thinking. The A163 doesn't have a reset input like the A160 clock
> divider does. Won't it end up in an indeterminate state when you

reset

> the master clock

you could avoid this problem by simply multing the clock output from
the A190 so it goes to the A154 and the A163 , so that if you reset
the A190 then the A154 and A163 would always be in sync(or phase).
the A154 would accept the reset pulse from the A190 to do the stop
and start functions and the A163 will always sync itself to the clock
out of the A190 regardless of the A190 reset output.

now it would be a wise option to use a buffered multiple for multing
the clock from A190 to clock the A154, A160/161 and the A163. i would
use the Analogue Solutions MX224 Mixer / Inverter / Buffer, which is
a 4hp module(small and has 2 inverted and 4 normal buffered outputs),
to do the multing to have precise voltages to avoid any delays and
keep things tight and in sync. the plus side to this module is, it
has inverted outputs, as well, to do ping pong style panning and
delays. hope this helps.

regards,
RM


That would mean the clock pulses from the A163 could

> be as much as 180 degrees out of phase with the master clock, a
> half-step delay.
>
> Has anyone tried this Is there any way to do what I want to do
>
> Joe