"Analog VCOs usually have significant DC offset."
"Um... really? What are some examples?"
"Well, all the ones I have can be used as LFOs, so of course they have DC offset."
"Um... what does that have to do with it? Which oscillators do you mean? And how much offset?"
"The Dixie II, the Rubicon, and the E352."
"Um... but the E352 isn't even an... never mind. How much offset does yours have?"
"I'm not one for deep analysis, maybe it's a direct current, not an offset."
The above is a pretty good example for my recent Web log posting at https://ansuz.sooke.bc.ca/entry/365
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