Muff's Modules & More

jw112 · Posted: Fri Jun 08, 2012 11:53 pm Post subject:

im really looking forward to this one

paults · Posted: Sat Jun 09, 2012 2:18 pm Post subject:

100% routed. Need to clean up the silkscreen a bit but off for 4 prototype pc boards on Monday. 2 weeks to get back, 1 week to solder.

Drumdrumdrumdrum · Posted: Mon Jun 11, 2012 8:19 am Post subject:

You didn't leave much room for the Unicorns!?

mangobob · Posted: Mon Jun 25, 2012 11:53 pm Post subject:

Will this oscillate at low frequencies to use as a sine LFO too?

paults · Posted: Tue Jun 26, 2012 12:26 am Post subject:

I will have to run tests for the +-12V conversion (the original MOTM-440 is +-15V biased). I will guess that for full-scale sine outs the lowest frequency will be around 18Hz. So probably not a LFO.

But makes a dandy VCO, even not calibrated to exactly 1V/Oct it will be close and will track 4 octaves or so. The sine out is very pure, on the order of 0.025% THD.

komyta · Posted: Tue Jun 26, 2012 2:08 am Post subject:

That looks so sweet. applause

mangobob · Posted: Tue Jun 26, 2012 8:45 pm Post subject:

Drumdrumdrumdrum · Posted: Wed Jun 27, 2012 8:10 am Post subject:

I may have to get two of these babies?! That way there will be a good chance the e410 will follow the e440's journey to Euro.

Everyone buy two! hihi

paults · Posted: Wed Jun 27, 2012 8:38 am Post subject:

UPDATE: the prototype pc boards (shown above) arrive tomorrow. Sending them off to be professionally soldered next week. If it all works and sounds good will order production parts to build 1st week of August.

The MOTM-410 currently uses 3 dual Vactrols. This is an issue because:

a) price of Vactrols has TRIPLED last 14 months
b) they cannot (technically) be sold into the EU

There are current arguments for (b) that modules do not apply (but say a rack mount compressor or guitar pedal WOULD apply).

However, what makes the MOTM-410 unique is how the LFOs are set up and how the 3 BP filters are controlled by a clever switching/VCA scheme.

Which I could do ALL of this (and a few more clever tricks) in DSP code, reducing the retail price about $80 and eliminate the RoHS issue with the Vactrols. The inherent "sluggishness" and non-linear Vactrol responses are easily modeled in the DSP code (although I'm sure some folks would think they could tell the difference).

I would rather do it in DSP code because I can immediately think of 2 features I would add to the E410 (one being internal LFOs brought out to panel jacks and make them morphing LFOs) over just a MOTM-410 'reboarding'.

tonnu · Posted: Wed Jun 27, 2012 10:58 am Post subject:

what is the E410?

komyta · Posted: Wed Jun 27, 2012 11:11 am Post subject:

tonnu · Posted: Wed Jun 27, 2012 11:26 am Post subject:

paults · Posted: Wed Jun 27, 2012 11:30 am Post subject:

Not to worry: E440 will be at the dealears in late Aug/Early Sept if the prototype is fine (which is true about 75% of the time, but I do goof up every now and then).

I edited previous post, I should have said "..what makes the MOTM-410 unique is..."

The proposed E410 would have all the features of the MOTM-410 with additions.

BTW: we are in the process of looking at the next generation ST32 ARM CPUs that have higher clock speeds (over 150MHz) and floating point math. This will allow more dynamic real-time processing. The CPUs are more $$$ but run about 3X faster than what I use now.

Drumdrumdrumdrum · Posted: Thu Jun 28, 2012 3:02 am Post subject:

My fault for going OT and getting ahead of myself.

Really looking forward to the e440. hyper

itijik · Posted: Wed Jul 04, 2012 11:20 am Post subject:

Patiently waiting for the E440 love

paults · Posted: Wed Jul 04, 2012 12:21 pm Post subject:

The soldering on the 4 protos begins tomorrow. Not my me, by REAL pros screaming goo yo

JohnLRice · Posted: Wed Jul 04, 2012 12:35 pm Post subject:

paults · Posted: Wed Jul 04, 2012 12:48 pm Post subject:

Human females that have been doing this for a living. For 18 years. Who hand-solder 0201 and 0402 size parts (I crap out at o603 resistors, can do 0603 caps).

Production is 100% robot. But for protos I usually do the soldering but not this time (each board has like 142 soldered SMT parts). I'd rather spend the time soldering modules together and shipping to waiting folks (just finished 16 E340s).

Dofkev · Posted: Wed Jul 04, 2012 1:28 pm Post subject:

Drumdrumdrumdrum · Posted: Thu Jul 05, 2012 3:41 am Post subject:

This is turning into a e410 thread, which is fine with me. I too would pay more for analogue vectorials. Vectorials are my friend.

One question. If you go with DSP will you still be able to 'ping' the filters?