[sdiy] Reaktor and CV scaling...

[James R. Coplin]

The outputs *are* DC-coupled. I can output DC from panel knobs etc. no
problem. The only problem is that the output range is around -4.7v to 4.7v.
Enough to be usable but not enough to open up my filters etc. on my Serge or
2600 all the way up. A little amplification and I would be gold. This works
equally well with audio rate ac stuff as well. It seems the MOTU doesn't
care. I'm using a 2408mkIII. It looks like Reacktor only supports 16 outs
curently regardless of how many you have in your setup. You could run
multiple instances of reactor to get above that.

As far as your query about Reaktor having external inputs, you obviously
haven't worked with it before. It provides an amazing wealth of all sorts of
screwy things besides the standard mixing, filtering, panning, clipping,
etc. It generally doesn't make a distinction between audio rate and dc
stuff. Just plug away. I'm pretty pumped because if the MOTU could be scaled
to 1v/oct, I'm going to put a computer and rack mounted LCD into my modular
cases and go completely to town. The ability to jump in and out and in again
to Reaktor and the externals makes me quiver just thinking about it!

James R. Coplin
***************
If anyone asks of my whereabouts,
simply tell them i've gone out the window
for a spot of tea and am not
expected back any time soon.
***************

> -----Original Message-----
> From: owner-synth-diy at dropmix.xs4all.nl [mailto:owner-synth-
> diy at dropmix.xs4all.nl] On Behalf Of WeAreAs1 at aol.com
> Sent: Friday, January 23, 2004 3:37 AM
> To: moog at qwest.net; synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] Reaktor and CV scaling...
> 
> 
> In a message dated 1/22/04 8:29:31 PM, moog at qwest.net writes:
> 
> << I don't know if anyone else has messed with this, but I just stumbled
> on
> the
> fact that I can use reactor as a CV generator for my modular rig! I don't
> know if it is sound card dependent but I use MOTU stuff which gives me an
> absurd number of analog I/O's. This might not work on other manufacturers
> cards. >>
> 
> Hello James,
> 
> I would be very surprised to find that the MOTU audio interfaces have
> DC-coupled outputs.  It is more likely that hey are AC-coupled (via
> capacitors), so
> they would only be useful for sending out AC control signals (such as fast
> envelopes or fast-ish LFO's.  If you are able to send out static DC
> signals,
> please let us know.
> 
> I have heard about people modifying original ADAT's to record and play
> back
> DC control signals, usually for the purpose of motion control in amusement
> parks and stuff like that.  I think they simply remove or bypass the
> capacitors at
> the inputs and outputs.  They may also have to put in some kind of DC
> offset
> trimmer on each channel, but I don't know about that.  It's probably
> possible
> to modify a MOTU box in the same way, although it might be tough to get
> schematics from them.  If you could get DC signals out of the MOTU box,
> then Reaktor
> would really be a fun addition to an analog modular setup, especially if
> you
> could route incoming analog signals back INTO reaktor (so it could also
> respond to external control signals).  Does Reaktor have any audio input
> modules?
> If so, maybe they'll also accept DC signals. BTW, which MOTU box do you
> have?
> 
> Please keep us posted on your experiments with this.
> 
> Michael Bacich
> 
> P.S. - If Reaktor works for this purpose, I'll bet MAX would also work.