Archive of the former Yahoo!Groups mailing list: MOTM

Here is a quick update of module status:

MOTM-420 2-pole VCF [MS-20 type]

PC board went off to the fab today! Will start shipping near June 14th.
You will need more heat-sink compound for this as well as the MOTM-410
filter.

No metal cans this time! Has 2 trims (1V/Oct and Resonance Amount).

Has HP, LP and Notch. Just to prevent some ∗potential∗ email questions, the
notch is
only 6dB so the effect is ∗slight∗ compared to the HP and LP. The HP with
high Q will
call dogs from miles away. Feed it a narrow pulse and your tweeters will fry
like bacon in the skillet.

Only a 6/10 in complexity.


MOTM-410 Triple Resonator with VC LFO [PS-3100 type]

Well, after extensive bench testing I decided the LEDs interacted too much
with the Vactrols. Sorry Rocket,
blinking lites are history. So the 2U layout on the website will be it.
Download the MP3 file if you get a chance.

As far a having individual sensitivity settings: it turn out that you can
emulate this quite well by setting where each
filter's initial frequency is, ∗relative to∗ the input. You can set them way
up high (6Khz) so that they have no effect
on the sound. So, this is analogus to sensitivity settings. I ∗know∗ it's
not exactly the same, but it will do. I have
messed with the breadboard for several days, and the sounds you can get are
stunning. Running a signal with a little
white noise added can really made huge "swirling" sounds.

The pcb will be dense: ∗as dense∗ as the VCOs. It is rated a 9/10
complexity. Warn your family & friends accordingly!

MOTM-320 VC LFO

Breadboard is running. Needs some range tweaking, but is looking good. Dual
LED looks pretty cool.

Rated about a 7/10 in complexity (there are LOTS of transistors to get mixed
up!).


Which module you guys want after the 420: the 410 or the 320?

Paul S.