A toy synthesizer program to demonstrate various Haskell language features. this is more a receptacle for exposing pedagogically Haskell's concept and features than a "Real-World" program, so use with care and feel free to hack it.
To build (only on a recent linux, I think):
> cabal install
To run the web application:
> websynth
Then point your browser at =http://localhost:4000/=
To run the command-line application:
> synthesizer
> > load hp hp
> > play hp
This will load a file named =hp= containing the first few notes of Harry Potter's theme then play the tune. Note this requires the program aplay to be installed.