MOTM

Some utility functions I've thought about are:

1.  Foot Pedal Interface 
2.  Fixed Voltage Source
3.  Input/Output Jacks separated by Momentary Switches
4.  Attenuators/Reversing Attenuators/Inverters

Also, I recall each of the following being discussed on the list at one time or another:

1.  Moog Ladder Filter
2.  Voltage-Controlled DADSR Envelope Generator
3.  Multi-mode Xpander Filter

Anybody else have $0.02 to put into the mix?

-Chris-


>>> djthomaswhite@... 11/15/00 12:01PM >>>
>Suggestions for others are welcome!-PS

Thanks for the update Paul!!!

This brings to mind a poll of useful utility modules to think about. The 
list has been a little quite and I know all of you have some opinions in 
this area so speak up! Paul has mentioned making these modules in the future 
so our information and voices will eventually be heard and some made into 
reality, exciting huh?

I would like to see small 1u versions of the following functions (some can 
be combinations on one panel if there is room as well)...

1.Attenuator module with 0-10 attenuator and a reversible attenuator or two, 
maybe with an inverter on the bottom as well.

2.Alternate noise source (Dare I say Digital/Pseudo random?)

3.Small series of different ring-mod circuits if they really can sound as 
different as recently described on the list.

4.Clipper/Rectifier or maybe bigger module like Oakley Wavefolder

5.CV Buffer/Multiple module (One in buffer with 3 outs or so?)

6.Headphone monitoring module (Stereo/Mono)

7.Really dreaming here... 3u module with small power amp and 3" to 4" 
grilled speaker with input jack and volume attenuator, HA! Maybe a 4-6" oval 
speaker? Imagine 2 of these in the bottom corners of your plush wooden 
cabinet. Doing this one without a machine shop means cutting a big oval or 
circular hole into a 3u panel, YIKES!!! ARP 2600 Style

8. Simple LFO so I can stack them in my cabinet thick. Maybe a dual LFO in 
1u with a knob for each frequency and 4 waveforms out per LFO?

Well, thats just a few of my dreams. What about you? Stand up and be heard 
people, I know I'm curious. Far out shi* appreciated greatly

Thomas White




>If case everyone has forgotten, the modules planned (in no particular 
>order)
>are:
>
>microVCO
>AC/DC Mixer
>SEM filter
>dual VCA/Pan/Fade
>Triple preamp (1U)
>Envelope Follower/Compressor
>VC'd Pulse Divider
>some 1U utility modules (need a RM)
>VC'd Phase Shifter (pretty complicated!)
>delayed Vibrato
>
>Suggestions for others are welcome!
_________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.

Share information about yourself, create your own public profile at 
http://profiles.msn.com.

Utility modules:
1. Joystick / gate buttons (2U)
2. analog inverter or reversible attenuator
3. 1U power switch for rear mounted supply and +/-10V dc jacks
4. comparator (switch mode only dumbed down version of the 700)
5. dual one shots / gate delays
6. boolean logic + flip flops
7. 4 to 1 / 1 to 4 analog switch

Moe

> 1.Attenuator module with 0-10 attenuator and a reversible attenuator
> or two, maybe with an inverter on the bottom as well.

  I've got one about 50% done on a small PCB, maybe I'll finish it. ;)

> 2.Alternate noise source (Dare I say Digital/Pseudo random?)

  I also have this done as a PCB using my little PIC12C508 program.  Would
have to add pink noise output and a CV input to control noise clocking
rate.

> 5.CV Buffer/Multiple module (One in buffer with 3 outs or so?)

  AKA DC distribution amp.  I made a PCB for one a loooong time ago; I'll
have to dig it out.  It had inverting, non-inverting simultaneous outputs.
2 inputs, *12* outputs for a dual 1x3x-3 ^^;

Crow

/**/

From: thomas white <djthomaswhite@...>
1.Attenuator module with 0-10 attenuator and a
reversible attenuator or two, maybe with an inverter
on the bottom as well.
---------

From: CHRIS PARKER <cparker@...>
Some utility functions I've thought about are:
4.  Attenuators/Reversing Attenuators/Inverters
------
From: Dave Bradley <daveb@...>
Utility modules:
2. analog inverter or reversible attenuator
---------
I just finished a DIY dual reversing attenuator on a small (but nice)
protoboard.
It has 2 ins and 4 outs.  INs are 1, and err... 2
Outs are 1, 2, mix(+) and mix(-)
The individual outs can be wired to be included or
excluded from the mix (when jacked).  You can have
one each way or both the same.

The two pots are standard MOTM spacing.  Since it is only 2U high, it can be
mounted in a standard 1U panel with the jacks below, or on a 2U high panel
with jacks to the side, or even 1U with jacks to the side.   Price of ALL
the components including the 6 switchcraft jacks and 2 Bournes 91A (normal
MOTM quality) pots and circuit board is about  $25.  Add knobs and metal
panel to that.

This might hold some of you over until some official MOTM  stuff comes out.
I plan to put it at my site, but the server is down right now.  *&^%$@#!*
So, mail me if you want a photo of the proto-type.

I have two other small utility projects I want to do on this same board.

After I built this one, I thought the same parts could make just a plain
nice dual reversing attenuator with two outputs on each channel and no
mixing.  The two outputs would be 180 out of phase so that even though you
have the attenuator as reversing, you have both normal and reversed outputs
at the same time.  So the 4 outputs would be 1+ and 1- and 2+ and 2-. I find
I like to have LFO signals both positive and negative at the same time going
as control voltages.  While you can get that using a multiple and inverter,
this method makes both signals attenuated the same.

And, I also thought about adding a switch for 2x or 3x gain since it is
normally a unity gain attenuator only.

Anyhow, none of this is rocket science (or I could not do it.)  But, it was
easy and fun.

Larry H

Hello,
 In addition to many of the ideas mentioned, I'd like to see an 
Oberheim-style Tracking Generator module.  I use these often when programming 
sounds on my Obie. Some of the many things you can do with tracking 
generators are vary filter cutoff for different ranges of the keyboard, scale 
LFOs, envelopes and other mod sources for different shapes, etc.  I also use 
it for taming the VCA's output for different keyboard ranges. You know when 
you get that patch that sounds great in only one octave? These can fix that!  
You can also use it locate satellites which is helpful in setting up your 
satellite dish.  Okay, I'm joking about the satellites, but it really is a 
very useful tool !  : )

  Keep on patching,
  Andrew Sanchez

I *think* all this is, is the keyboard voltage going through a reversing
attenuator. If not,
please elaborate.

Paul S.

----- Original Message -----
From: <ixqy@...>
To: <motm@egroups.com>
Sent: Wednesday, November 15, 2000 6:00 PM
Subject: Re: [motm] Future Utility Forum


>
>  Hello,
>  In addition to many of the ideas mentioned, I'd like to see an
> Oberheim-style Tracking Generator module.  I use these often when
programming
> sounds on my Obie. Some of the many things you can do with tracking
> generators are vary filter cutoff for different ranges of the keyboard,
scale
> LFOs, envelopes and other mod sources for different shapes, etc.  I also
use
> it for taming the VCA's output for different keyboard ranges. You know
when
> you get that patch that sounds great in only one octave? These can fix
that!

> You can also use it locate satellites which is helpful in setting up your
> satellite dish.  Okay, I'm joking about the satellites, but it really is a
> very useful tool !  : )
>
>   Keep on patching,
>   Andrew Sanchez
>
>
>
>

In a message dated 11/15/00 11:10:04 AM, daveb@... writes:

<< Utility modules:
1. Joystick / gate buttons (2U) >>

Yes; what happened to the Joystick module with the connector for an external 
PC joystick on the front panel?

Ivan

Lumped into "utility", with the Yamaha and Roland footpedal stuff :)

Paul S.

----- Original Message -----
From: <ivancu@...>
To: <motm@egroups.com>
Sent: Wednesday, November 15, 2000 7:46 PM
Subject: Re: [motm] Re: Future Utility Forum


>
> In a message dated 11/15/00 11:10:04 AM, daveb@... writes:
>
> << Utility modules:
> 1. Joystick / gate buttons (2U) >>
>
> Yes; what happened to the Joystick module with the connector for an
external

> PC joystick on the front panel?
>
> Ivan
>
>
>
>

Andrew,
    Unless I am missing something obvious, I think this can be done in other
ways with almost existing stuff.  For keyboard tracking of a filter for
example, I would take 1-volt-oct-CV and run it to the FM1 input of the
filter (420 or 440).  The input reversing attenuator could be used to bias
the effect in a positive or negative fashion.

For using it with a VCA, I would think something like connect the 1-v-oct CV
to one input on a 700.   Use your VCA EG to switch the 700 so this voltage
is only biased in during the VCA on time.  But, instead of using the EG
output directly to control the VCA, run it to a mixer and sum it with the ON
output of the 700 so that anytime the EG has the VCA open, it is biased by
some DC offset (attenuated and/or reversed) that is derived from 1-volt-oct.

These are just some initial thoughts on how I might try to implement
keyboard tracking.  Of course, I have none of the traditional modular
experience like some guys here to fall back on, so these are really off the
cuff.

Larry H

----- Original Message -----
From: <ixqy@...>
 In addition to many of the ideas mentioned, I'd like to see an
Oberheim-style Tracking Generator module.  I use these often
when programming sounds on my Obie. Some of the many things
you can do with tracking generators are vary filter cutoff for
different ranges of the keyboard, scale LFOs, envelopes and
other mod sources for different shapes, etc.  I also use
it for taming the VCA's output for different keyboard ranges.

>  ----- Original Message -----
>  From: <ixqy@...>
>  To: <motm@egroups.com>
>  Sent: Wednesday, November 15, 2000 6:00 PM
>  Subject: Re: [motm] Future Utility Forum
>  >
>  >  Hello,
>  >  In addition to many of the ideas mentioned, I'd like to see an
>  > Oberheim-style Tracking Generator module.  I use these often when
>  programming
>  > sounds on my Obie. Some of the many things you can do with tracking
>  > generators are vary filter cutoff for different ranges of the keyboard,
>  scale
>  > LFOs, envelopes and other mod sources for different shapes, etc.  I also
>  use
>  > it for taming the VCA's output for different keyboard ranges. You know
>  when
>  > you get that patch that sounds great in only one octave? These can fix
>  that!
>  > You can also use it locate satellites which is helpful in setting up your
>  > satellite dish.  Okay, I'm joking about the satellites, but it really is 
a
>  > very useful tool !  : )

In a message dated 11/15/00 7:57:28 PM Central Standard Time, 
synth1@... writes:

> I *think* all this is, is the keyboard voltage going through a reversing
>  attenuator. If not,
>  please elaborate.
>  
>  Paul S.
>  

 It's a bit more than a reversing attenuator in that it can actually change 
in complex ways the resulting effect of a source on it's destination. For 
example, it can scale an LFO's output to where a triangle wave can have more 
(or less!) peaks/dips in the waveform. The portions of the cycle that this 
happens at are dependent on the five point settings of the tracking 
generator.  Each of these points can be set from 0-63. I don't have my manual 
handy for a more technically correct explanation, but I guess it can be 
described as a waveshaper for control signals. 

 I really think it would be great addition to MOTM line of modules.

 Andrew Sanchez

A real tracking generator has various points on the scale where the slope of the
function changes.  Only very simple tracking (single function) can be performed with
a reversing attenuator.  The tracking generator in the Oberheim Xpander, allows you
to set the output level for 5 points evenly spaced along the scale for the input. 
So, you can have a negative slope for some of the range and a positive slope for
other parts of the range with different slopes along the way!  

The question is, can a tracking generator be built out of Tony's multi-stage
envelope generator (sorry, the real name is escaping me at the moment).

Eric

--- Paul Schreiber <synth1@...> wrote:
> I *think* all this is, is the keyboard voltage going through a reversing
> attenuator. If not,
> please elaborate.
> 
> Paul S.
> 
> ----- Original Message -----
> From: <ixqy@...>
> To: <motm@egroups.com>
> Sent: Wednesday, November 15, 2000 6:00 PM
> Subject: Re: [motm] Future Utility Forum
> 
> 
> >
> >  Hello,
> >  In addition to many of the ideas mentioned, I'd like to see an
> > Oberheim-style Tracking Generator module.  I use these often when
> programming
> > sounds on my Obie. Some of the many things you can do with tracking
> > generators are vary filter cutoff for different ranges of the keyboard,
> scale
> > LFOs, envelopes and other mod sources for different shapes, etc.  I also
> use
> > it for taming the VCA's output for different keyboard ranges. You know
> when
> > you get that patch that sounds great in only one octave? These can fix
> that!
> > You can also use it locate satellites which is helpful in setting up your
> > satellite dish.  Okay, I'm joking about the satellites, but it really is a
> > very useful tool !  : )
> >
> >   Keep on patching,
> >   Andrew Sanchez
> >
> >
> >
> >
> 
> 


__________________________________________________
Do You Yahoo!?
Yahoo! Calendar - Get organized for the holidays!
http://calendar.yahoo.com/