Re: [Haskell-cafe] help with musical data structures

Postscript... Hi Mike I rather overlooked your efficiency concerns, however I wouldn't be so concerned. By the nature of what they represent I wouldn't expect pitch classes to grow to a size where a bit representation out weighs the convenience of a list or Data.Set. By the same reason - I'd only use an array for the pitch matrix if I felt an interface favouring index-lookup was most 'comfortable'. Best wishes Stephen