MOTM

OK, it's contest time. Winner gets something, I'll dig up a goodie.

Mockup (text or graphics) a proposed uLFO. You have 3 basic configs to choose from

a) 3 pots, 6 jacks

b) 4 pots, 4 jacks

c) 3 pots, 1 switch &1  LED, 4 jacks

Features, waveshapes, functions, etc are up for grabs! Deadline is Friday at noon. You can send
them in to the list, which then 'locks' that exact design BUT gives others ideas. Or wait until
11:59AM (like eBay!) to post. it.

Get going!!!! You don't have to *electrically* design it, just the 'UI' as the SW geeks speak.
Think "Micro"!!!

Paul S.

Any chance we can have a sample and glide waveform? Or is that too much?

-----Original Message-----
From: Paul Schreiber [mailto:synth1@...] 
Sent: Tuesday, December 04, 2001 10:57 PM
To: MOTM listserv
Subject: [motm] Mock up the MOTM-390 uLFO

OK, it's contest time. Winner gets something, I'll dig up a goodie.

Mockup (text or graphics) a proposed uLFO. You have 3 basic configs to
choose from

a) 3 pots, 6 jacks

b) 4 pots, 4 jacks

c) 3 pots, 1 switch &1  LED, 4 jacks

Features, waveshapes, functions, etc are up for grabs! Deadline is
Friday at noon. You can send
them in to the list, which then 'locks' that exact design BUT gives
others ideas. Or wait until
11:59AM (like eBay!) to post. it.

Get going!!!! You don't have to *electrically* design it, just the 'UI'
as the SW geeks speak.
Think "Micro"!!!

Paul S.




 

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Ok, here goes.  This pretty much a skinny 320.  I'll do layout C:

Pots:      Rate
            FM    (reversing)
           Shape

       LED    Switch

Jacks: (FM IN) (Sync)
       (Shape) (Out)

Shape works like the 320.  Switch selects between ramp and pulse; with shape
centered this also gives a triangle (which I like for modulation).

Personally, I'd also like a sine output feature, but "thinking micro"
suggests the extra waveshaping might be too much (it apparently was for
uVCO), and it complicates the switch.

Only other thing missing vs. the 320 is the 1V/oct input.

                ...Craig

----- Original Message -----
From: "Paul Schreiber" <synth1@...>
To: "MOTM listserv" <motm@yahoogroups.com>
Sent: Tuesday, December 04, 2001 10:56 PM
Subject: [motm] Mock up the MOTM-390 uLFO


> OK, it's contest time. Winner gets something, I'll dig up a goodie.
>
> Mockup (text or graphics) a proposed uLFO. You have 3 basic configs to
choose from
>
> a) 3 pots, 6 jacks
>
> b) 4 pots, 4 jacks
>
> c) 3 pots, 1 switch &1  LED, 4 jacks
>
> Features, waveshapes, functions, etc are up for grabs! Deadline is Friday
at noon. You can send
> them in to the list, which then 'locks' that exact design BUT gives others
ideas. Or wait until
> 11:59AM (like eBay!) to post. it.
>
> Get going!!!! You don't have to *electrically* design it, just the 'UI' as
the SW geeks speak.

> Think "Micro"!!!
>
> Paul S.
>
>
>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>

OK, so I like the idea of many LFOs.  My idea uses a) 3 pots, 6 
jacks.  Each pot controls the RATE of one of three LFOs, each jack 
PAIR is the output, one is inverted.  The waveform is fixed (SINE or 
TRIANGLE).  Alternatively, each LFO is a different waveform (TRI, 
SAW, and SQUARE?).

Mike

--- In motm@y..., "Paul Schreiber" <synth1@a...> wrote:
> OK, it's contest time. Winner gets something, I'll dig up a goodie.
> 
> Mockup (text or graphics) a proposed uLFO. You have 3 basic configs 
to choose from
> 
> a) 3 pots, 6 jacks
> 
> b) 4 pots, 4 jacks
> 
> c) 3 pots, 1 switch &1  LED, 4 jacks
> 
> Features, waveshapes, functions, etc are up for grabs! Deadline is 
Friday at noon. You can send
> them in to the list, which then 'locks' that exact design BUT gives 
others ideas. Or wait until
> 11:59AM (like eBay!) to post. it.
> 
> Get going!!!! You don't have to *electrically* design it, just 
the 'UI' as the SW geeks speak.

> Think "Micro"!!!
> 
> Paul S.

At 12:56 AM -0600 12/05/01, Paul Schreiber wrote:
>OK, it's contest time. Winner gets something, I'll dig up a goodie.
>
>Mockup (text or graphics) a proposed uLFO. You have 3 basic configs to
>>choose from
>
>a) 3 pots, 6 jacks
>
>b) 4 pots, 4 jacks
>
>c) 3 pots, 1 switch &1  LED, 4 jacks

Three Big Questions:

1) Is it stable like the 320??  It makes a big difference in what features
would be useful.  Considering the range of the 310, you are already selling
a "uLFO"

2) Does the circuitry behind it have to fit on a 800-sized PCB??

3) Is it 1V/oct or linear??  That's not a UI decision.  If it's linear,
having two CV inputs might be superfluous.

>Features, waveshapes, functions, etc are up for grabs! Deadline is
>Friday at noon. You can send them in to the list, which then 'locks' that
>>exact design BUT gives others ideas. Or wait until
>11:59AM (like eBay!) to post. it.

FWIW, I'm more interested in helping create a better product than winning a
contest.  If I can also antagonize Paul in the process, well that's just
gravy ;)

>Get going!!!! You don't have to *electrically* design it, just the 'UI' as
>>the SW geeks speak. Think "Micro"!!!

If we can electrically design it do we get bonus points??

Here's another idea based on b) 4 pots, 4 jacks:

   * Two LFOs
   * One PAIR of knobs per LFO: SHAPE (TRI to SAW? to SQUARE?) and 
Rate
   * One PAIR of jacks per LFO: SYNC and OUT

Simple and useful and cheap!

Mike

--- In motm@y..., "Paul Schreiber" <synth1@a...> wrote:
> OK, it's contest time. Winner gets something, I'll dig up a goodie.
> 
> Mockup (text or graphics) a proposed uLFO. You have 3 basic 
configs to choose from
> 
> a) 3 pots, 6 jacks
> 
> b) 4 pots, 4 jacks
> 
> c) 3 pots, 1 switch &1  LED, 4 jacks
> 
...

I like Ken's idea for a multi-phased LFO.  So I've added a bit to it.  Ok,
here's my humble attempt...

c) 3 pots, 1 switch, 1 LED, 4 jacks:

       RATE
        (O)
        FM
        (O)
       SHAPE
        (O)

    SIN     led
     + SAW  (*)
   PULSE

  (FM IN)   (0 OUT)
  (120 OUT) (240 OUT)

RATE, FM and SHAPE pots, and FM IN jack operate like the 320.  SAW, SIN or
PULSE wave output is selected by 3-position switch.  TRI is attained by
setting switch to SAW and SHAPE is mid-setting (just like the 320).  The led
is bi-color and works like the 320.

Advantages:
1) quadrature LFO!
2) basic 320 functionality in 1U good for those SKB dudes, but differs
enough from 320 to make it interesting to all
3) circuitry similar enough to 320 that it should be quick to implement
(NAMM!)
4) all std waveforms available
5) FM IN
6) blinky LED!

Disadvantages:
1) no SYNC
2) no 1V/OCT IN
3) no SHAPE IN
4) only one waveform available at a time
5) blinky LED!

I for one think a sine output is very important for proper sounding vibrato
& tremolo, so it's included even though I'm sure it involves additional
circuitry.  I realize that this design may actually involve more circuitry
than the 320 (due to the phase shifted outputs) but Paul has always said
that circuit parts are much less in cost compared to front panel parts.

George

Hi everyone, 

I don't own a MOTM (yet :^) ). But I figured I would
give the design a try. It's essentially just a ripped
down version of the original in u-form. You can see it
here:

http://www.geocities.com/skinmatrix/390uLFO.gif

I went for simplicity and roughly visual compatibility
to the original. I unfortunatly had to strike two
features from the design (tracking and shape inputs),
but I suppose something has to make a it micro. Let me
know what you think. 

Mark Platt

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At 1:25 PM -0500 12/05/01, George Kisslak wrote:
>
>I like Ken's idea for a multi-phased LFO.  So I've added a bit to it.  Ok,
>here's my humble attempt...
>
>c) 3 pots, 1 switch, 1 LED, 4 jacks:
>
>       RATE
>        (O)
>        FM
>        (O)
>       SHAPE
>        (O)
>
>    SIN     led
>     + SAW  (*)
>   PULSE
>
>  (FM IN)   (0 OUT)
>  (120 OUT) (240 OUT)
>
>RATE, FM and SHAPE pots, and FM IN jack operate like the 320.  SAW, SIN or
>PULSE wave output is selected by 3-position switch.  TRI is attained by
>setting switch to SAW and SHAPE is mid-setting (just like the 320).  The
>>led is bi-color and works like the 320.

Wouldn't that need a larger PCB than the MOTM-320??

>Advantages:
>1) quadrature LFO!

Quadrature is 90 degrees out of phase.

>Disadvantages:
>1) no SYNC
>2) no 1V/OCT IN
>3) no SHAPE IN
>4) only one waveform available at a time
>5) blinky LED!

So you might as well just get a 320 and regain all of those features,
including its impressive stability.

>I for one think a sine output is very important for proper sounding vibrato
>& tremolo, so it's included even though I'm sure it involves additional
>circuitry.  I realize that this design may actually involve more circuitry
>than the 320 (due to the phase shifted outputs) but Paul has always said
>that circuit parts are much less in cost compared to front panel parts.

That is true.  Front panel parts do cost more.

Well, now that Paul has shot down JH's award winning (IMHO) design due to
complexity/cost/strangeness (bummer), I thought maybe I should reduce the
cost of my last submission.  This of course assumes that multiple phase outs
is expensive - if not, then my prior "Ken-inspired" submission stands.

a) 3 pots, 6 jacks:

       RATE
        (O)
        FM
        (O)
       SHAPE
        (O)

  (FM IN)    (SIN OUT)
  (SHAPE IN) (SAW OUT)
  (SYNC)     (PULSE OUT)

Essentially a 320 without a 1V/OCT input, a TRI OUT and a LED.  (Actually,
I'd sneak a LED in there between the RATE and FM pots, like on the 850.)
TRI is attained at SAW OUT with SHAPE at mid-setting (like the 320).
Reasonablly cheap, utilitarian, and definitely not strange. (bummer)
Downside: a) circuitry is no cheaper than the 320, b) design=yawn.

George

hello all,

what on earth have i stumbled into..?
anyway, my only thoughts on the amazing microlfo, would be that it would be
nice for it to be able to perform two roles:

1) use as a clock source - saves wasting a perfectly good 320

2) use as an lfo controlled lfo - i just love those wobbly patches where a
filter is controlled by an lfo which is controlled by the sweep of a second
lfo

so, just got back from a gig - two SKBs of MOTM, a Taalmala (indian drum
machine), space echo & space invader game - versus, a whole rack of Emu
stuff, an SH101, Pro 1, nova, supernova, etc etc
and i think we won, but i'm knackered, and now i've 70 odd photos to look
through...
with any luck i'll get to post them on my site www.unrecordings.co.uk over
the weekend

cheers
paul b
stars on 23

I hope Paul can keep up with these suggestions!

3 pots (rate) 6 jacks (2 for each LFO, + and -)

How about we do it with each LFO having a different shape, with 
two "sync" switches... one between each pot.  Putting on the top sync 
switch would make the 2nd LFOs match the rate of the first, and 
having just the thrid switch on would make the third LFO match the 
second, and both would make them all follow the 1st LFO...

Alternatively, we could make the bottom 3 jacks the outputs, and 
instead of having + and -, we could make the top jacks 1v/oct (or FM)

That's my idea... need me to draw it?  <grin>
-Geoff


> OK, so I like the idea of many LFOs.  My idea uses a) 3 pots, 6 
> jacks.  Each pot controls the RATE of one of three LFOs, each jack 
> PAIR is the output, one is inverted.  The waveform is fixed (SINE 
or 

> TRIANGLE).  Alternatively, each LFO is a different waveform (TRI, 
> SAW, and SQUARE?).
> 
> Mike

Rate Pot
Phase Lock Pot (0 to 360 degrees)
Shape Pot
Rate LED
/1, /2, /4 Switch (for Phase Lock)
Phase Lock In Jack (Defeats Rate Pot, locks LFO to incoming frequency)
Sine Out Jack
Tri/Saw Out Jack
Pulse Out Jack

Probably not simple enough, but what the hell.  This would be a great
complement to Dual VCA/Panner/Faders.

John Loffink
microtonal@...

K.. I'm a bit late to the party here. : )

 How about for option C.. 

 3 pots: Rate, Phase, FM +/-

 1 Switch: Wave - 3 position (saw-square-tri) 

 1 Rate LED

 The 4 Jacks:
 a. Sync - works with Phase knob for use with other MOTM 390s :)
 b. Rectified ouput (has this been done b4?)
 c. FM input
 d. Output (saw-square-tri output)

 Andrew



--- In motm@y..., "Paul Schreiber" <synth1@a...> wrote:
> OK, it's contest time. Winner gets something, I'll dig up a goodie.
> 
> Mockup (text or graphics) a proposed uLFO. You have 3 basic configs 
to choose from
> 
> a) 3 pots, 6 jacks
> 
> b) 4 pots, 4 jacks
> 
> c) 3 pots, 1 switch &1  LED, 4 jacks
> 
> Features, waveshapes, functions, etc are up for grabs! Deadline is 
Friday at noon. You can send
> them in to the list, which then 'locks' that exact design BUT gives 
others ideas. Or wait until
> 11:59AM (like eBay!) to post. it.
> 
> Get going!!!! You don't have to *electrically* design it, just 
the 'UI' as the SW geeks speak.

> Think "Micro"!!!
> 
> Paul S.