MOTM

Well, the nifty modified cable that I used for cv into my motm modules
from my Prophet 5 'failed' so I broke down and stepped into the midi world
(yes, many years late after trying to avoid midi completely), and bought a
Kenton Pro Solo.  Upon my receiving the unit I noticed that it doesn't
support 1/4" jacks (ok, I'm learning).  For you Kenton users, what
connectors/adapters do you use to connect the 'little' Pro Solo sockets to
your 1/4" motm sockets?
Thanks, Jeff

I assume you are referring to 1/8" (mini-phono or 3.5mm) jacks.

The MOTM-940 is your answer!

http://www.synthtech.com/motm/m940

Cheers!
Shemp

> Well, the nifty modified cable that I used for cv into my motm modules
> from my Prophet 5 'failed' so I broke down and stepped into the midi world
> (yes, many years late after trying to avoid midi completely), and bought a
> Kenton Pro Solo.  Upon my receiving the unit I noticed that it doesn't
> support 1/4" jacks (ok, I'm learning).  For you Kenton users, what
> connectors/adapters do you use to connect the 'little' Pro Solo sockets to
> your 1/4" motm sockets?
> Thanks, Jeff

I wondered similar things.  When I put my powersupply in a 1U 10" rack 
plate, I was left with a lot of room with nothing to do. At first I 
thought multiples would be good there, but then I hit upon the idea of 
 having 4 front panel jacks for CV and Gate.  So I got a mini plug 
cable and cut it in half.  I soldered one half to the 4x multiple that 
I labled Gate, the other to the 4x I labled CV.

Now this is some fun!

I am still trying to work out how to get the Vortex "Foot controler" 
input to recognize the 320 LFO's wave as the same as the foot pedal 
moving.  I have yet to find anything in the Vortex docs that say what 
sort of voltage range that kooky thing is looking for.

One last thing. Vortex and modulars are a good union.  They go very 
well together if you are into making strange and spacey stuff.

Bruce

I use RS 1/4" to 1/8" adapters with my Pro-4.  I don't like 1/8" jacks so I
refuse to call them by their correct name :)

>Now this is some fun!

Yes :)

>I am still trying to work out how to get the Vortex "Foot controler"
>input to recognize the 320 LFO's wave as the same as the foot pedal
>moving.  I have yet to find anything in the Vortex docs that say what
>sort of voltage range that kooky thing is looking for.

I haven't had my coffee yet, so try to read this very slowly :)

Like most pedals, it is looking for 0-5V.  Afaik, it says that right in the
manual.  Otherwise, how would I know?? :)  A 320 outputs -5 to +5.  A
negative voltage won't hurt the Vortex, but it will treat it as zero -- not
what you want (unless you are using a square wave :)

Since I want to use my 320 with pedal inputs, and it is one of the main
reasons I bought it, I also bought an Oakley multimix PCB.  I already have
several mixers but they are all AC coupled.  If I normal the inputs to +5V
-- potting up that channel half way that gives +2.5V, the 320 potted up
halfway gives -2.5 to +2.5, summed gives 0-5V.

However, this would tie up the DC mixer, and I could only use one waveform
at a time.   I'm thinking of building a knobless dedicated box, on the
floor, powered from the motm.  In it I could put two circuits, each with an
inverting summing amp with 2.5V (by voltage dividing the +15 supply
voltage) and the input divided in half at it's inputs, followed by another
inverting amp, with a few mults.  This way I could use both Sine and
Triangle with my various pedal inputs (I think I have seven, but without
coffee...)

Then again, there might be a more elegant way to do this...

>One last thing. Vortex and modulars are a good union.  They go very
>well together if you are into making strange and spacey stuff.

You can also use a trigger out to flip the A/B switch by using a
gate-to-S-trigger converter, but you need to add a cap to stretch the pulse
-- I think mine uses a .1uF tantalum with a 15K resistor, but I built it
years ago and I could be wrong.  I'll open it up if you need to know. Too
large a cap and it won't work at all.

--- In motm@y..., mark@i... wrote:
> >I am still trying to work out how to get the Vortex "Foot 
> >controler" input to recognize the 320 LFO's wave as the same as 
> >the foot pedal moving.  I have yet to find anything in the Vortex 
> >docs that say what sort of voltage range that kooky thing is 
> >looking for.
> 
> Like most pedals, it is looking for 0-5V.  Afaik, it says that 
> right in the manual.

Remember that the Vortex calls for a PASSIVE rocker pedal, not a 
standard CV pedal.  It uses a 3-connector jack (for TRS stereo 
plugs); one connector *outputs* 5v, one connector is ground, and one 
connector is the voltage return.  In order to use a CV source to run 
the Vortex, you'll need to make a cable that has a 1/4" TRS (stereo) 
plug at one end (Vortex side) and a 1/4" mono plug at the other (MOTM 
side).  Ths TRS plug will only have the ground and voltage return 
terminals connected to the cable, while the 5v output needs to be 
left unconnected.

    -Doug
     ceres@...

At 6:19 PM +0000 04/25/01, ceres@... wrote:
>
>>
>> Like most pedals, it is looking for 0-5V.  Afaik, it says that
>> right in the manual.
>
>Remember that the Vortex calls for a PASSIVE rocker pedal, not a
>standard CV pedal.

Then I don't think I've ever seen a "standard" CV pedal.

>It uses a 3-connector jack (for TRS stereo plugs); one connector *outputs*
>>5v, one connector is ground, and one connector is the voltage return.
>In order to use a CV source to run the Vortex, you'll need to make a cable
>>that has a 1/4" TRS (stereo) plug at one end (Vortex side) and a 1/4"
>mono >plug at the other (MOTM side).

The tip is the return (the voltage out of the divider in the pedal), so if
you use a regular TS 1/4" cable with the shield ground it will work fine.
You could also use a regular TRS cable -- the 5V ring will be ignored by
the jacks in the MOTM (although the Vortex will ignore any negative
voltages). You could also use an insert cable and ignore one end, and have
a 5V source for something else.  No special cable is needed.

Don't we do enough soldering as it is?? :)

>Ths TRS plug will only have the ground and voltage return terminals
>>connected to the cable, while the 5v output needs to be left unconnected.

Actually, if the 5V gets connected to ground, it could care less -- that's
what would happen if the wiper in the pedal was all the way at that end.