Helen,The tempo of ABC's has me completely foxed. I use ABCMUS and while it's a great program in many respects it's tempo is always up the s**t. From memory it's usually played in Em, but because my bass voice stops at Eb I transposed it into Dm - which is a fair key for folkies to play in. (Years ago I could easily ping the F but a few decades of tobacco, alcohol and loose living have diminished that. Sad, but true!)
Regards, John