CD4007 what’s ifs

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I’ve used the 4007 for the bypass circuit in pedals. Lower parts count as you can do the flip flop and actual switching with one IC.
First time I saw this was in those Pearl FX-pedals (Sound Spice series), nifty implementation indeed.

Curious which piece of gear used this the first time.

I've seen Nobels pedals using it as well, but those will be later than those Pearl pedals.
Maybe the use by Maestro (so possibly Oberheim) or TC predates that of Pearl?
 
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