In an equally tempered musical scale, the ratio between adjacent notes is the 12th root of 2 ( 1.059... ).

As far as I have been able to find, this value has never been represented by a greek letter.

I am using phi to represent this value as it has been used to represent a ratio, the golden ratio, and it

is a ratio that I am trying to represent.

Is phi a bad choice because of it's being already used for a different ratio value?

Is there a better choice?