Copyrights of synthesizer circuits

[Rick Jansen]

> So I am asking that is it illegal to little modify those circuits and
> then use them in my own commercial projects? Of course Moog is now dead,
> but how about Oberheim, Korg etc?

> As far as I know patents of the Moogfilter are expired so there should 
> be no problem (don't rely on that!).

I'm not a lawyer either, but my feelings are that if a person or
company has put work into something you can't simply grab it 
and start making money with it. The patent on the Moog ladder may 
be expired, but to me that doesn't mean you can now sell "Moog" 
filters. I have made a Moog filter too, but I feel it cannot be
used for commercial purposes, i.e. manufacturing and selling it.

Rick Jansen
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rick at sara.nl   http://www.sara.nl/Rick.Jansen
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S&H's a module and s&h's looking good