How Long, How Long Blues by Leroy Carr is in C at 80 beats per minute and runs 2:36 across 26 bars. It uses 9 chords — C, G7, C7, Cdim7, Dm7, G+, F, Fm, and a few more. The chord diagram changes as the song plays and the words light up as they are sung, so you can strum and sing along without reading ahead.
Want the melody line note by note? How Long, How Long Blues guitar melody tab.