The book is a really awesome way to learn Haskell. However, very little of it is actually about FRP; there's one section about GUIs using FRP, and it doesn't go very much in depth.
Pretty sure that's just a different book by the same author. "Updating" a book on graphics to make it about music instead doesn't sound like a second edition kind of maneuver.
Comments
As far as I know, Hudak has updated and renamed his book to The Haskell School of Music, and it's available for free from the Yale Haskell Group's website here: http://haskell.cs.yale.edu/?post_type=publication&p=112
The book is a really awesome way to learn Haskell. However, very little of it is actually about FRP; there's one section about GUIs using FRP, and it doesn't go very much in depth.
Pretty sure that's just a different book by the same author. "Updating" a book on graphics to make it about music instead doesn't sound like a second edition kind of maneuver.
... especially true for one dealing with an "immutable" programming language
:)