Here's my retooling of BrowserUk/Arien's solution, which falls one character shy of matching:
sort{$a-$b}keys%{{map{map{1e-3*int"@_"*1e3*$x/$_,0}1..($x=$_)}1..pop}}
It had promise, I swear! I was sure that the old "keys on temporary hash" trick would work, but alas, denied. I futzed with the clever sprintf() replacement, and could not find any slack. Very elegant.

By the way, I just have to interject that Perl 5 prototypes are evil. I'd suggest not using them.

Update: Added missing bracket per Django's catch.

In reply to Re: Golf: overtone calculator by tadman
in thread Golf: overtone calculator by Django

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