Many years ago whe I was still in the Navy, I used to car share with a guy on regular trips from Merseyside to Portsmouth and back most weekends.
He was learning morse code at the time for a particular course he was on. Using a tape in his walkman he would listen to morse and told me that after a bit of practice it was like listening to music, you recognised the flow of the sound rather than the notes it is made from. And he was learning military tactical Russian!!
