About 15 years ago I went to University and studied for a degree in Electronic Engineering. For my final project I designed a device which allowed one to whistle (or sing) into a microphone and the resultant notes as standard staff notation were printed out on the computer screen. (I used a BBC in those days). To acomplish this I had to strip the sound going into my device down to the fundamental frequency, the pitch of the note, by removing all the harmonics which gave the note its distictive sound or tone, i.e, piano or flute. A recorder produced the cleanest sine wave and was the easiest to capture. I think therefore, the difference between pitch and tone is obvious and has already been explained above.