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RE: [motm] module idea & question

RE: [motm] module idea & question

2000-04-25 by Tkacs, Ken

You could make an arpeggiator based on "sequencer-like" technology.

You can also get Korg Mono/Poly-like effects using a quantizer with a sample
& hold unit.

(Gotta keep plugging away at the quantizer...)
Show quoted textHide quoted text
 -----Original Message-----
From: 	Nathan Hunsicker [mailto:nate@...] 
Sent:	Tuesday, 25 April, 2000 11:52 AM
To:	motm@egroups.com
Subject:	[motm] module idea & question

Has there been any discussion about an arpeggiator module? I know that
there was some past mention about an arpeggiator function integrated into
the DoMOAS sequencer although I wouldn't want to be spending <$500 each on
DoMOAS sequencers just to replicate a 3 voltage patern to send out to a
VCF. (Not to say I don't want a DoMOAS when they come out.) I don't know
how this module would be constructed (ins, outs, controls) but maybe a
small  (4 or 8) step sequencer with CV & time knows and a CV out for each
step. Let me know if I'm crazy.

Also:

Will a gate out (from my midi-cv conv.) re trigger a slow sine wave from my
320 LFO, I want to make sure that the 5V out from the midi-cv won't fry the
sync input. If so, will the wave reset on key press or key release?

-Nate



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Re: [motm] module idea & question

2000-04-25 by Paul Schreiber

----- Will a gate out (from my midi-cv conv.) re trigger a slow sine wave
from my
320 LFO, I want to make sure that the 5V out from the midi-cv won't fry the
sync input. If so, will the wave reset on key press or key release?


The sync input on the '320 is active when the voltage is greater than +3V.
So yes,
a GATE out will hold it in reset *as long as the GATE is active!*.

This is not what you want :) Rather, you need a *trigger pulse* output to
sync the '320.

Paul S.

Re: [motm] module idea & question

2000-04-25 by Nathan Hunsicker

>
>
>
>----- Will a gate out (from my midi-cv conv.) re trigger a slow sine wave
>
>from my
>
>320 LFO, I want to make sure that the 5V out from the midi-cv won't fry the
>
>sync input. If so, will the wave reset on key press or key release?
>
>
>
>
>
>The sync input on the '320 is active when the voltage is greater than +3V.
>
>So yes,
>
>a GATE out will hold it in reset *as long as the GATE is active!*.
>
>
>
>This is not what you want :) Rather, you need a *trigger pulse* output to
>
>sync the '320.
>
>
>
>Paul S.

Which leads me to my next question, is there any simple way to make a gate
to trigger pulse convertor? -Nate

RE: [motm] module idea & question

2000-04-25 by Dave Bradley

All it takes is a flipflop, a resistor, and a cap to create a delay from the
output to the Reset input.

Dave Bradley
Principal Software Engineer
Engineering Animation, Inc.
daveb@...
Show quoted textHide quoted text
> -----Original Message-----
> From: Nathan Hunsicker [mailto:nate@...]
> Sent: Tuesday, April 25, 2000 11:34 AM
> To: motm@egroups.com
> Subject: Re: [motm] module idea & question
>
>
> >
> >
> >
> >----- Will a gate out (from my midi-cv conv.) re trigger a slow sine wave
> >
> >from my
> >
> >320 LFO, I want to make sure that the 5V out from the midi-cv
> won't fry the
> >
> >sync input. If so, will the wave reset on key press or key release?
> >
> >
> >
> >
> >
> >The sync input on the '320 is active when the voltage is greater
> than +3V.
> >
> >So yes,
> >
> >a GATE out will hold it in reset *as long as the GATE is active!*.
> >
> >
> >
> >This is not what you want :) Rather, you need a *trigger pulse* output to
> >
> >sync the '320.
> >
> >
> >
> >Paul S.
>
> Which leads me to my next question, is there any simple way to make a gate
> to trigger pulse convertor? -Nate
>
>
>
> ------------------------------------------------------------------------
> You have a voice mail message waiting for you at iHello.com:
> http://click.egroups.com/1/3555/3/_/529958/_/956680570/
> ------------------------------------------------------------------------
>
>

Re: [motm] module idea & question

2000-04-25 by Paul Schreiber

> .
>
> Which leads me to my next question, is there any simple way to make a gate
> to trigger pulse convertor? -Nate
>
>
Sure, use a 555 timer as a monostable, set for a 100us output pulse.

Paul S.

RE: [motm] module idea & question

2000-04-25 by Nathan Hunsicker

I guess I could also use an EG to do this, although it would  seem like a
waste of it's capabilities. Maybe I'm misunderstading what you wrote but
I'm looking for a short pulse at the start of each gate instead of a delay.
-Nate
Show quoted textHide quoted text
>
>All it takes is a flipflop, a resistor, and a cap to create a delay from the
>
>output to the Reset input.
>
>
>
>Dave Bradley
>
>Principal Software Engineer
>
>Engineering Animation, Inc.
>
>daveb@...
>
>
>
>> -----Original Message-----
>
>> From: Nathan Hunsicker [mailto:nate@...]
>
>> Sent: Tuesday, April 25, 2000 11:34 AM
>
>> To: motm@egroups.com
>
>> Subject: Re: [motm] module idea & question
>
>>
>
>>
>
>> >
>
>> >
>
>> >
>
>> >----- Will a gate out (from my midi-cv conv.) re trigger a slow sine wave
>
>> >
>
>> >from my
>
>> >
>
>> >320 LFO, I want to make sure that the 5V out from the midi-cv
>
>> won't fry the
>
>> >
>
>> >sync input. If so, will the wave reset on key press or key release?
>
>> >
>
>> >
>
>> >
>
>> >
>
>> >
>
>> >The sync input on the '320 is active when the voltage is greater
>
>> than +3V.
>
>> >
>
>> >So yes,
>
>> >
>
>> >a GATE out will hold it in reset *as long as the GATE is active!*.
>
>> >
>
>> >
>
>> >
>
>> >This is not what you want :) Rather, you need a *trigger pulse* output to
>
>> >
>
>> >sync the '320.
>
>> >
>
>> >
>
>> >
>
>> >Paul S.
>
>>
>
>> Which leads me to my next question, is there any simple way to make a gate
>
>> to trigger pulse convertor? -Nate
>
>>
>
>>
>
>>
>
>> ------------------------------------------------------------------------
>
>> You have a voice mail message waiting for you at iHello.com:
>
>>
>><http://click.egroups.com/1/3555/3/_/529958/_/956680570/>http://click.egroups.co
>>m/1/3555/3/_/529958/_/956680570/
>
>> ------------------------------------------------------------------------
>
>>
>
>>
>
>
>
>
>
>

Re: [motm] module idea & question

2000-04-25 by The Old Crow

> > Which leads me to my next question, is there any simple way to make a gate
> > to trigger pulse convertor? -Nate

> Sure, use a 555 timer as a monostable, set for a 100us output pulse.

  Ultracheap method (fits in one end of a patch cord):

  gate >---/\/\/---+
            22K   _|_
                  ___ 0.01uF
                   |
                   |
                   +--------> trig ___|\___
                  _|_
            1N914 /_\
                   |
                  _|_
                  \_/ (ground)


  ..at least I think that's how I used to make these.  Just some dinky
step differentiator with a period of about 220 microseconds and a diode to
keep the return step (gate returning to zero volts) from creating the
negative differential pulse. __|\__  __
                                   |/ <-- that thing


   Nearly as cheap method but needs PIC: program one of the 8-pin PICs to
output triggers on a few pins for each gate input.  Can then do fun stuff
like an output pin for each rising gate edge, an output pin for each
falling gate edge (trig on release) and an output pin for trigger on both
edges.  Could even fudge a konb in there to set the trigger pulse width.

Crow

/**/

Re: [motm] module idea & question

2000-04-25 by Paul Schreiber

I think the R and C need to be swapped.

Paul S.

----- Original Message -----
From: The Old Crow <oldcrow@...>
To: <motm@egroups.com>
Sent: Tuesday, April 25, 2000 12:32 PM
Subject: Re: [motm] module idea & question


>
> > > Which leads me to my next question, is there any simple way to make a
gate
Show quoted textHide quoted text
> > > to trigger pulse convertor? -Nate
>
> > Sure, use a 555 timer as a monostable, set for a 100us output pulse.
>
>   Ultracheap method (fits in one end of a patch cord):
>
>   gate >---/\/\/---+
>             22K   _|_
>                   ___ 0.01uF
>                    |
>                    |
>                    +--------> trig ___|\___
>                   _|_
>             1N914 /_\
>                    |
>                   _|_
>                   \_/ (ground)
>
>
>   ..at least I think that's how I used to make these.  Just some dinky
> step differentiator with a period of about 220 microseconds and a diode to
> keep the return step (gate returning to zero volts) from creating the
> negative differential pulse. __|\__  __
>                                    |/ <-- that thing
>
>
>    Nearly as cheap method but needs PIC: program one of the 8-pin PICs to
> output triggers on a few pins for each gate input.  Can then do fun stuff
> like an output pin for each rising gate edge, an output pin for each
> falling gate edge (trig on release) and an output pin for trigger on both
> edges.  Could even fudge a konb in there to set the trigger pulse width.
>
> Crow
>
> /**/
>
>
> ------------------------------------------------------------------------
> You have a voice mail message waiting for you at iHello.com:
> http://click.egroups.com/1/3555/3/_/529958/_/956684031/
> ------------------------------------------------------------------------
>
>

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