Mu-Tron Micro-Tron IV
Your Micro-Tron IV just got a little more fun! 2 alternate modules are available for fun and different voices of the classic filter effect.
"The 'Blue' module has a much steeper Attack and Release and is more suitable for fast, “Jaco” style bass playing. If you like to play 16th and 32nd notes and your filter just can’t keep up, this may be the one for you"