N_Cook wrote:
r02455212, demultiplexer for 7 octave keyboard Roland RD 300SX.

I Googled that part number and it seems to also have been used on a
semi-recent (about 2012) keyboard, RD-700NX. This guy took his apart to
look at it, and provided an inventory of the major ICs:

http://www.pianoworld.com/forum/ubbt..._RD_700NX.html

Assuming a spares or repair broken piano is not available. Is the IC
likely to be obtainable through the barrage of scammers, timewasters
and googlead revenue crap, to genuinly purchase one from the far east?

Have you taken the revolutionary step of asking Roland?

Matt Roberds