Clock divider help

menJop · Post by **menJop** » Sat Feb 11, 2006 12:54 pm

What I'm trying to do is probably pretty basic, but this Modular stuff is all fairly new to me.

Using the Modular III, I'm trying to drive the cutoff frequency of a filter from a random LFO (got that much), sync the LFO to an external MIDI source (okay so far), and divide the MIDI clock into 16th notes. It's that last bit that's been giving me grief.

If I connect the frequency out of a MIDI clock module to the frequency in of the LFO, I get nice quarter notes. Although it seems like the filter changes are not tightly locked to the beat.

I haven't had any luck with any of the clock dividers. I've tried too many permutations to list here. The closest I've come to success was connecting an out from the divider to the frequency in of the LFO, but even with the divider set to 1/1, it sounds like it's pumping the LFO really, really fast (like several times faster than the 8Hz or so I'm looking for).

Does anyone have any suggestions on how to a) drive the LFO at 4 times the frequency of a MIDI clock signal and b) lock it tightly?

Many thanks,
John

at0m · Post by **at0m** » Sat Feb 11, 2006 1:10 pm

To lock it tighter you could retrigger it with a MIDI note:
MIDI In > MIDI2Trig > multiLFO B.

menJop · Post by **menJop** » Sat Feb 11, 2006 4:35 pm

Thanks at0m. I gave that a shot without much luck. I'm using the multiLFO A, and I have the trigger out from the MIDI2Trig module connected to the gate in on the LFO. I've tried it both with "retrigger" on and off.

Any thoughts?

John

alfonso · Post by **alfonso** » Sat Feb 11, 2006 6:07 pm

The LFO receives speed information from the frequency dividers when set to external, but it must receive gate signal to restart it's cycle from the right point.

Clock dividers are not for lfo's, they can adjust the speed of sequencer modules (CW's only, as FleXors use a ramp signal).

Anyway the typical division values for frq. dividers and clock dividers are 3(pretty fast),6,12,24 etc...if you need triplet values you'll use 4,8,16,32 etc., this because all are denominators of 24.

menJop · Post by **menJop** » Sat Feb 11, 2006 7:03 pm

On 2006-02-11 18:07, alfonso wrote:
The LFO receives speed information from the frequency dividers[...] Clock dividers are not for lfo's[...]

That was the key! Many thanks!

My next step is to try to find a suitable gate source....

alfonso · Post by **alfonso** » Sun Feb 12, 2006 6:42 am

On 2006-02-11 19:03, menJop wrote:
On 2006-02-11 18:07, alfonso wrote:
The LFO receives speed information from the frequency dividers[...] Clock dividers are not for lfo's[...]
That was the key! Many thanks!

My next step is to try to find a suitable gate source....

The gate out from the MVC module, the same that goes to envelope.

Michu · Post by **Michu** » Sun Feb 19, 2006 10:48 am

for use with random lfo you should use frequency divider as suggested by At0m
if you'd want to use sample&hold module (for Odyssey type of modulation) you could use clock divider.