Feature: Key

[tkell]

I guess the parent Audio object should have a key?

Or should we be cute and make it computable per-TimeSlice?

[wxy656]

I saw your code，and find pitch_names = [ 'c', 'c #', 'd', 'eb', 'e', 'f', 'f #', 'g' Ab ',' a ',' bb ',' b '] in audio.py file , do you use this array to match the pitch value of each beats?
So can we extracted every beat's key value directly? and the key value is equal to pitch class?

[tkell]

Hey @bmcfee, is a key estimator included in your Krema work?

[bmcfee]

Not yet, but it's on the roadmap. I'm still struggling with beats/bars, but key should be relatively easy by comparison.