MOTM

Is it possible to record a CV into a sequencer?  IS
there anything special that you need to be concerned
about?  What about playback of the Cv?

Thanks!
Shemp

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Can't do it. The hardware is not present. In order to record CV input *accurate* enough to drive
VCOs, the added cost to the unit would be about $125. Tell you what: if I sell enough '600s maybe
in 18 months there will be Version II :)

Paul S.

----- Original Message -----

From: "Tentochi" <tentochi2003@...>
To: <motm@yahoogroups.com>
Sent: Monday, January 13, 2003 1:07 AM
Subject: [motm] [Q] Recording CV in Sequencer?


> Is it possible to record a CV into a sequencer?  IS
> there anything special that you need to be concerned
> about?  What about playback of the Cv?
>
> Thanks!
> Shemp
>
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So it IS possible then, right?  So I can run Cubase or
Logic and send CV to an audio track and record it and
then play it back.

Paul, your point is that the resolution (and range) of
recording and playback need to be high enough to
reproduce pitches accurately.  How much pitch
resolution (in cents) would you have recording at 16
bit?  24 bit?  How many bits would be needed for 1/10
cent accuracy?  1/100 cent?

I am guessing that the sampling frequency would not
affect it too much if it were at least 44.1 kHz,
correct?

It seems like the A/D and D/A convertors shouldn't
affect it too much unless they REALLY compensate for
audio signals and it ends up coloring the CV signal. 
Is this correct?

And finally, using the CV for to generally open and
close a filter shouldn't be a problem, right?

I do like the idea of the '600 being able to do this,
but that is quite a way off for now.

Thanks!
Shemp

> Can't do it. The hardware is not present. In order
> to record CV input *accurate* enough to drive
> VCOs, the added cost to the unit would be about
> $125. Tell you what: if I sell enough '600s maybe
> in 18 months there will be Version II :)
> > Is it possible to record a CV into a sequencer? 
> IS
> > there anything special that you need to be
> concerned
> > about?  What about playback of the Cv?


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hello all,
i'd hazzard a guess (and i'd love to prove myself wrong but...) i think it
is pretty useless trying to record DC into a computer based DAW
it just won't do it (?)
if you want to record CVs then for the time-being, get a Roland CSQxxx
sequencer, or i think the Mobius might do it
failing that, get one of the Kenton Control Freaks - they have 1-2 CV to
MIDI convertors that i think record 0-5V as continuous controllers

cheers
paul b
sheffield / uk

Err.....how can it be "possible" if the HARDWARE is NOT on the PC board??

Paul S.

>Can't do it. The hardware is not present. In order to record CV input
>>*accurate* enough to drive VCOs, the added cost to the unit would be
>about >$125. Tell you what: if I sell enough '600s maybe
>in 18 months there will be Version II :)

Yes, then in your opinion, half the sequencers out there aren't accurate
enough to drive VCO's :)

Perhaps there could be a separate module that does pitch-->CV and
CV-->MIDI, with some other analyses like a Fairlight Voicetracker, but with
a CV input on a switched jack.

Anyway, I'm quite glad to hear that "cyber moe" is up and running (there
has to be a better nickname than "micro sequencer" :)

What I would love to see added to the 600 is CV control of pitch functions
(key modulation, transposition, etc.)  That would kick ass!!  Oh come on,
it's "only software" :)


>i'd hazzard a guess (and i'd love to prove myself wrong but...) i think it
>is pretty useless trying to record DC into a computer based DAW
>it just won't do it (?)

People have done it.  If you pull the input caps from a 16-bit ADAT, it
will record DC.  Then you can bridge that into a DAW.

Eventually, I'm going to try it myself, but I can't justify getting a used
ADAT.  Today, I drop two working 15" monitors in the dumpster.


>if you want to record CVs then for the time-being, get a Roland CSQxxx
>sequencer, or i think the Mobius might do it
>failing that, get one of the Kenton Control Freaks - they have 1-2 CV to
>MIDI convertors that i think record 0-5V as continuous controllers

There are plenty of devices that convert CV to MIDI CC, and there are a few
devices that can convert CV to MIDI notes.  I had an OP-8M, but it wasn't
all that useful -- interesting control voltages are not square.

> Yes, then in your opinion, half the sequencers out there aren't accurate
> enough to drive VCO's :)

Incorrect statement. Actually, it's *all of them* :)
> 
> What I would love to see added to the 600 is CV control of pitch functions
> (key modulation, transposition, etc.)  That would kick ass!!  Oh come on,
> it's "only software" :)

Errr....read the spec. It already *does this*.

Paul S.

At 11:52 AM -0600 1/13/03, Paul Schreiber wrote:
>
>> Yes, then in your opinion, half the sequencers out there aren't accurate
>> enough to drive VCO's :)
>
>Incorrect statement. Actually, it's *all of them* :)

My bad :)

>> What I would love to see added to the 600 is CV control of pitch
>> functions (key modulation, transposition, etc.)  That would kick ass!!
>>>> Oh come on, it's "only software" :)
>
>Errr....read the spec. It already *does this*.

Is there a new spec??  The one at the website is dated 12/06/02 "Revision
5".  I read that one, and for CV input modulation modes it lists:

1. None
2. Tempo
3. Gate Time
4. Cycle Mode
5. Sequence Length
6. Sequence Step  (awesome, it's also a voltage sequencer!!)
7. Sequence Number
8. Multi-trigger

While that is very impressive and exciting list of funky features, it
doesn't include any pitch functions.  While key modulation might be
impossible (how would it know??), transposition functions (shifting up or
down by a note, interval, octave) would be a powerful addition to its CV
modulation modes and perhaps the only way to create "new" notes via CV.

Also, is there a way to add a variation of the Sequence Step mode so that
it plays no note (no gate) if the voltage is zero??

Sorry for the confusion.....yes, it will transpose via CV In.

Will see about the other 'rest' thing.

Paul S.

>i think it
> is pretty useless trying to record DC into a computer based DAW
> it just won't do it (?)

I dunno, worked fine for me.

Jay

What hardware are you using?

Thanks

--- In motm@yahoogroups.com, "Jay <synthbaron@y...>" <synthbaron@y...> 
wrote:

> >i think it
> > is pretty useless trying to record DC into a computer based DAW
> > it just won't do it (?)
> 
> I dunno, worked fine for me.
> 
> Jay

At 10:38 PM +0000 1/13/03, Jay <synthbaron@...> wrote:
>>i think it
>> is pretty useless trying to record DC into a computer based DAW
>> it just won't do it (?)
>
>I dunno, worked fine for me.

What did you use??

At 2:07 PM -0600 1/13/03, Paul Schreiber wrote:
>
>Sorry for the confusion.....yes, it will transpose via CV In.

Excellent :)

>Will see about the other 'rest' thing.

OK :)  I'm thinking even though a 700 or perhaps an 850 could be used as a
work around, that would make a nice addition.  Just so the rest of the list
doesn't think I'm making up useless features, here are some examples:

Envelopes could play short bursts of notes.

By entering a scale as the "sequence", a percussion pad generating short
spikes of voltage could be used to play each note depending on how hard it
was hit.  Similarly, a ribbon controller or touch keyboard that only
outputs a voltage when touched could also be used.  In both of these
examples, the accuracy of the time quantizing can be varied by the speed of
the clock, including a very fast clock, and modulating that clock creates
"groove" quantizing.

When controlled by an LFO, rests can be added by offsetting its output with
a negative voltage from an 800 or some other source.

The "no gate" signal can be used with other functions such as an inverter
to reset LFO's and trigger envelopes or other events.  By re-triggering the
voltage signal determining the step, the sequence can be looped, as well as
reset by a negative voltage.  Then that loop can be altered my modulating
that voltage or the other CV input.

Yet, in all these examples, the output remains "musical" as it quantized in
both pitch and time, and can be easily synced to other events.