Archive of the former Yahoo!Groups mailing list: MOTM
Subject: Stupid V/Hz and V/Oct question
From: "sucrosemusic" <sucrosemusic@...>
Date: 2002-02-08
Alright, just checking on something here. A "Volt/Octave" VCO is
actually an expoential VCO, since it converts a linear voltage into
an expoential response... so a MIDI-CV converter, or CV Keyboard
would actually be putting out a liner change as you go up the
keyboard.
So, an LFO patched straight into the Volt/Octave input of a VCO, say
a uVCO, would be able to make the osc. shift up and down an octave
each way, right? But the 800s are exponential, so plugging them
straight into a Volt/Octage input on a VCO would make an apparent
expoential change in audio, even thogh it was already expoential, it
would ∗sound∗ exponential, because it would actually be doubly
exponential? I assume, in that case, you'd use the "Exp" setting on
a MOTM-300's FM jack to get an apparent linear response, right?
Another question is the FM on the various filters, (420 and 440
really). Does that FM expect a linear or exponential curve? Or, is
Volt/Octave expecting a linear signal, and FM expecting an
exponential one?
Ok, that's all.