Getting to 16 inputs

I have a working 4051 with an Arduino Uno board, and a SoundWave board on top. I'm building a piano, and was hoping to have 2 octaves worth of notes. For that I'll need 16 inputs (so far I only have 8).

I've been looking for ways to use 2 4051s. I think I could just put one 4051 into A0, and the other into A1, but I wanted to see if there was a more intuitive way to do it.


No that is the simplest way of using those two chips.

Thank you!