MOTM

I finished the "I'm pretty sure it's correct" schematic for the MOTM-410
filter
today. To get Shemp drooling:

64 resistors (!!?!)
14 caps
7 ICs
9 transistors

This will be a 8 out of 10 in complexity to build (the VCO is a 9). Also
note due to
the large # of components the kitting up of parts will take me about 8 days.
So again,
it's first come - first served. I have orders for about 13 right now (not
counting subscribers)
so order early if you can.

Note that the last of the big non-MOTM project will hit all of the first 10
days of Sept. I will *try*
to get the '410 to pcb fab before then. I'm starting the layout tonight: I
expect about 16 hours
of CAD time to completion.

Paul S.

Go Paul!  hm, maybe cheerleaders on the sidelines would not be such a good
idea for a long CAD session ... :)

Maybe there should be something added to the MOTM name to connote "Modular
of many filter types".

This is kind of a left-field thought, but has anyone (possessing more
oscillators than I) tried using MOTM VCOs to make Chowning/Yamaha-style FM
patches?  All the old books say you can't do FM synthesis with analog
VCOs, but maybe a MOTM-300 is precise enough to pull it off?

peace,
Chris

In a message dated 8/18/99 3:04:16 PM, cjeris@... writes:

>Go Paul!  hm, maybe cheerleaders on the sidelines would not be such a good
>idea for a long CAD session ... :)


Chris! You're a CAD for even making the suggestion of cheerleaders (no pun is 
too low for me)!


>This is kind of a left-field thought, but has anyone (possessing more
>oscillators than I) tried using MOTM VCOs to make Chowning/Yamaha-style
>FM
>patches?  All the old books say you can't do FM synthesis with analog
>VCOs, but maybe a MOTM-300 is precise enough to pull it off?


I don't know enough about digital to comment with any degree of authority 
(not that that's ever stopped me before) but I would think you would need to 
specify both accurate pitch and accurate phase of all waves involved.

JB

>From: Christopher Jeris <cjeris@...>
>This is kind of a left-field thought, but has anyone (possessing more
>oscillators than I) tried using MOTM VCOs to make Chowning/Yamaha-style FM
>patches?  All the old books say you can't do FM synthesis with analog
>VCOs, but maybe a MOTM-300 is precise enough to pull it off?
>
Using my 300 and (highly controversial) Doepfer A-111 osc.'s I've gotten
some pretty convincing 1-operator DX-ish timbres. However, you'd basically
need 12 osc's, adsr's and VCA'a to really do DX-style FM (2 apiece for each
of 6 operators), I'd rather just use my TX-416, which I got for just a
little more than the cost of 1 MOTM 300...

________________________________________________________
Dave Trenkel : improv@...  : www.peak.org/~improv/

"...there will come a day when you won't have to use
gasoline. You'd simply take a cassette and put it in
your car, let it run. You'd have to have the proper
type of music. Like you take two sticks, put 'em
together, make fire. You take some notes and rub 'em
together - dum, dum, dum, dum - fire, cosmic fire."
                                            -Sun Ra
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