multiplexer connecting, hall sensor 88?

Other Hardware LEDs and Multiplexing
1

I am doing a piano, and my idea was to do with hall sensors.

need a multiplexer to connect 88 sensors hall. which would you recommend?
any, SPI?

edit:

with a linear hall sensor could make a sensitive piano?
the hall sensor would have to be analog?, and multiplexer too?

2

could use this: 16-channel Multiplexer 74HC4067. ?

do not quite understand how to connect the 88 sensors hall, can you help me?