Midi-Cv equ-tet conversion experience

Hello,
I'd like to enquire if anybody has knowledge about Midi-CV
converters?
Specifically the sampling bit-depth of various models available?

I've just obtained an Arp Odyssey(why did i bother with all those
years of digital synths?)and i'm itching to hear it play 19-tet.
Apart from diving into the innards and changing the current
source for the keyboard resistor chain,i'd like to drive the CV
input from a Midi-CV convertor since i'm not a keyboardist .

Looking at the many models available there seems a recent
trend among the 16-bit accurate convertors to derive their
frequency by software which is predictably locked to 12-tet.
The cheaper lower bit rate convertors are i suspect not ideal for
shifting to many other equal-temp scales due to the less
accurate settings one can achieve with their trimmer pots.In a lot
of cases the bit depth isn't even advertised.

Has anybody used an older,trimmer set 16-bit convertor which i
might find s/hand or on ebay?

I appreciate this is a midi technical question but i would suspect
it wouldn't make much sense on a technical group.I take it there
are some of you using analog synthesis in other equal-tets who
might have fought around this little difficulty.

Robert

You might want to wait for the MOTM MIDI-CV 650 converter. It will support
microtonal scales through tuning table downloads:
http://www.synthtech.com/new_stuff.html. It has 16 bit accuracy.

I don't know of any others that can scale directly to support 19 equal. You
can always scale for equal temperament scales past the MIDI-CV converter by
attenuating the CV signal, but you'll want to make sure the output of the
scaling device is very low impedance (much less than 1 Kohm) to guarantee
tracking across the full keyboard range.

John Loffink
The Microtonal Synthesis Web Site
http://www.microtonal-synthesis.com
The Wavemakers Synthesizer Web Site
http://www.wavemakers-synth.com

> -----Original Message-----
> From: fforbesuk [mailto:fforbesuk@...]
> Sent: Sunday, October 19, 2003 6:16 PM
> To: MakeMicroMusic@yahoogroups.com
> Subject: [MMM] Midi-Cv equ-tet conversion experience
>
> Hello,
> I'd like to enquire if anybody has knowledge about Midi-CV
> converters?
> Specifically the sampling bit-depth of various models available?
>
> I've just obtained an Arp Odyssey(why did i bother with all those
> years of digital synths?)and i'm itching to hear it play 19-tet.
> Apart from diving into the innards and changing the current
> source for the keyboard resistor chain,i'd like to drive the CV
> input from a Midi-CV convertor since i'm not a keyboardist .
>
> Looking at the many models available there seems a recent
> trend among the 16-bit accurate convertors to derive their
> frequency by software which is predictably locked to 12-tet.
> The cheaper lower bit rate convertors are i suspect not ideal for
> shifting to many other equal-temp scales due to the less
> accurate settings one can achieve with their trimmer pots.In a lot
> of cases the bit depth isn't even advertised.
>
> Has anybody used an older,trimmer set 16-bit convertor which i
> might find s/hand or on ebay?
>
> I appreciate this is a midi technical question but i would suspect
> it wouldn't make much sense on a technical group.I take it there
> are some of you using analog synthesis in other equal-tets who
> might have fought around this little difficulty.
>
> Robert
>
>
>
>
>
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> More MMM music files are at http://www.microtonal.org/music.html
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