rudolpheg: too elaborate on slvchn's method, something like this:

[fiddle~]
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|<----------only taking the pitch info.
|
[+ .499]
|
[int]
|
[change]

the [int] truncates the midi float to an integer, and the +.499 is there so it rounds to the nearest note, rather than simply truncating the decimal off.

alternatel, you could use the attack bang inlet on [fiddle~] (the 3rd or 4th outlet?) to send a stored [float]. check the helps for [fiddle~] and [int]. and for your low cello notes, you want a bigger fft hanning window. try [fiddle~ 1024] perhaps.