[Haskell-beginners] How to interact with a process

Hello all, I know how to play a Midi file. I also know how to read the keyboard. But I don't know how to bring the two together such that I can start and stop playing from the keyboard. It is not required (just nice to have) that the console remains responsive while the midi file plays. But it is essential that I can stop the performance. Is this difficult? -- Martin