The keys start 48 with A being the first, the middle row is white keys, the top row is black keys. The bottom row starts with Z being 66 and continues all the way down. Each key plays for 2 beats however you can override them by playing another key. No two keys can be played at the same time. Sometimes the sounds will overlap. If a key is held down, it will continue to play with only a small pause between the beats.
