Key assigner replacement, midi interface and more for Yamaha SK15, SK20, SK30 and SK50D synthesizer.
Full info on the product page.
The versions for the various synths differ only in the length of the additional cables for midi, filter control etc. The KAC TM62100 chip is identical.
An exception is the “no midi” version. This is meant as a direct replacement for a defective YM62100 chip and does not feature any midi functionality.