I guess my setup is similar to what many of you are doing, so just take
it as another example for a working combination:
Korg Electribe-S drum machine as master clock (Midi),
Frostwave Fat Contoller sequencer to convert Midi clock to analogue Gate
(which then is used as an analog master clock for the whole studio).
Digital delay (TC Electronic D-Two - awsome delay !) also sync'ed
to Midi Clock.
I also tried the Blacet chip, and it works very well, too. I wanted to put
it inside a "master clock" module, together with some S&H stuff.
This is postponed because the Frostwave also has a handfull of
divider ratios built in already, easily to be altered on the fly when
the sequencer is running.
My initial idea of building an analog sync (PLL) for a BBD delay
is probably postponed for ever, since I got the D-Two. (;->)
(I still use the wonderful Dynacord BBD delays, but the D-Two
is doing most of the bread and butter stuff nowadays.)
This Garfield box - didn't it extract a clock from intelligent processing
of audio signals ? Or was this a different box from the 80's ?
JH.
mark@... schrieb:
> >I've long wanted to build a Master Clock box to let me run all my
> >sequencers and arpeggiators from one source.
>
> Would that be any different than choosing one of the clock sources you
> already have?? If you use MIDI, SMPTE, or use a digital multitrack, that
> should be the master.
>
> >It would need to have a very stable clock (20bpm-200bpm) with various
> >outputs ie. clock/2, clock/4, clock/8. It would also have negative
> >and positive going triggers, gates and a few inverters.
> >
> >I recall that in the 70's there was a device like this called Doctor
> >Click.
> >
> >Does anyone have schematics or ideas for building such a beast?
>
> I have a Garfield Dr. Click. It was made in the early 80's. It does what
> you say and more, however I usually slave it to the Sync24 or arpeggiator
> clock output of my Kenton Pro4. I don't have the schematics, but even if I
> did, there would be no way you want to clone it!! It has several massive
> PCB's filled with _hundreds_ of chips.
>
> Afaik, Blacet sells a chip that extracts MIDI beat clock, and it is not
> difficult to build circuits that divide by even numbers. I would do a web
> search, and look at the application notes for CMOS 4013, 4018, 4040, 4047;
> 7474, and the 555 timer. Pay attention to pulse width -- not all divider
> circuits work the same way. You should also be able to find a number of
> gate and trigger circuits at the various synth sites.
>
>
>
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