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How well does this filter track?
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John,
The 490 is a really sweet sounding filter, but it is designed to
emulate the 904A Moog closely. It's not set up for precision
tracking, and even lacks a multiturn trimpot to dial it in. The best
I've been able to do is to get it pretty good over 2-3 octaves. At 4
to 5 octaves, mine is out about a quarter tone.
Moe