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 _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
