I simply wanted to hear what one song sounded like in 12 different keys played on a chromatic, so here it is. Note: You simply raise each note by a half step to get the song in the next key (e.g. to go from C to C#). LYRICS Happy birthday to you, Happy birthday to you, Happy birthday to ___ ___ Happy birthday to you. KEY of C +3 +3 -3 +3 +4 -4 +3 +3 -3 +3 -5 +4 +3 +3 +7 +6 +5 -4 -3 -6 -6 +6 +5 -5 +4 KEY of C# <+3 <+3 <-3 <+3 <+4 +4 <+3 <+3 <-3 <+3 <-5 <+4 <+3 <+3 <+7 -6 <+5 +4 <-3 <-6 <-6 -6 <+5 <-5 <+4 KEY of D -3 -3 -4 -3 -5 <+5 -3 -3 -4 -3 +6 -5 -3 -3 -7 <-6 -5 <+4 -4 +7 +7 <-6 -5 +6 -5 Key of Eb <-3 <-3 +4 <-3 <-5 -5 <-3 <-3 +4 <-3 <+6 <-5 <-3 <-3 <-7 +7 <-5 -5 +4 <+7 <+7 +7 <-5 -6 <-5 Key of E -4 -4 <+4 -4 +6 <-5 -4 -4 <+4 -4 <-6 +6 -4 -4 -8 <+7 +6 <-5 <+4 -7 -7 <+7 +6 <-6 +6 KEY of F +4 +4 -5 +4 -6 +6 +4 +4 -5 +4 +7 -6 +4 +4 +8 -7 -6 +6 -5 <-7 <-7 -7 -6 +7 -6 KEY of F# <+4 <+4 <-5 <+4 <-6 -6 <+4 <+4 <-5 <+4 <+7 <-6 <+4 <+4 <+8 <-7 <-6 -6 <-5 -8 -8 <-7 <-6 <+7 <-6 KEY of G -5 -5 +6 -5 +7 <-6 -5 -5 +6 -5 -7 +7 -5 -5 -9 -8 +7 <-6 +6 +8 +8 -8 +7 -7 +7 KEY of Ab <-5 <-5 -6 <-5 <+7 +7 <-5 <-5 -6 <-5 <-7 <+7 <-5 <-5 <-9 +8 <+7 +7 -6 <+8 <+8 +8 <+7 <-7 <+7 KEY of A +6 +6 <-6 +6 -7 <+7 +6 +6 <-6 +6 -8 -7 +6 +6 +10 <+8 -7 <+7 <-6 -9 -9 <+8 -7 -8 -7 KEY of Bb -6 -6 +7 -6 <-7 -7 -6 -6 +7 -6 +8 <-7 -6 -6 <+10 -9 <-7 -7 +7 <-9 <-9 -9 <-7 +8 <-7 KEY of B <-6 <-6 <+7 <-6 -8 <-7 <-6 <-6 <+7 <-6 <+8 -8 <-6 <-6 -11 <-9 -8 <-7 <+7 +10 +10 <-9 -8 <+8 -8