Archive of the former Yahoo!Groups mailing list: MOTM

previous by date index next by date
previous in topic topic list next in topic

Subject: Re: [motm] 1v/hz vs. 1v/oct

From: Richard Brewster <pugix@...>
Date: 2006-11-16

Here's an interesting article:

http://en.wikipedia.org/wiki/CV/Gate

The term is Hz/Volt and the article shows a 55Hz/V example. This
doesn't answer the question. But it clarifies it. You need to specify
the Hz/V you want. The circuit to transform 1V/octave to 55Hz/Volt
would implement a transform function going from the voltages values on
the top row to the corresponding ones on the bottom:

X - Y
1.00 - 1.00
2.00 - 2.00
3.00 - 4.00
4.00 - 8.00
5.00 - 16.00

Y = f(X)

So what is f? My math isn't that good tonight.

Richard Brewster


Jonathan Snipes wrote:
> Hey friends,
>
> I just acquired a metasonix tm-3 oscillator, which takes a CV input
> of 1v/hz (as opposed to 1v/oct) ... I got the one with MIDI, so I can
> theoretically drive it alongside my other 1v/oct equipment on two
> separate midi channels that output the same information, but that's
> rather inelegant, and what if I want to drive it from a non-MIDI CV
> source (LFO, envelope, sequencer, etc) or add slew to it, etc etc?
>
> Is there a handy conversion module that goes back and forth between
> the two anywhere? or a PCB/schematic of one I could build? I don't
> know a lot about it, but seems like it would be pretty useful and not
> ∗too∗ tough, yeah?
>
> -Jonathan
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>