I am learning to play Tie Your Mother Down by Queen:
The song should be played at 135 BPM, the tempo is 12/8 (3 eight notes on each of the 4 quarters of the bar):
Beats: 1 ...... 2 ...... 3 ...... 4 ........
Notes: 1 2 3 4 5 6 7 8 9 10 11 12
\ / \ / \ / \ /
\ / \ / \ / \ /
Triplet Triplet Triplet Triplet (each note 1/8) -> 3 * 4 = 12 1/8 notes
My keyboard (Roland Juno DS-88) has builtin rhythm patterns which I use for the drums while playing.
The problem is that there isn't any pattern with a 12/8 tempo, so the closest one is a 6/8 shuffle tempo.
But at 135 BPM the 6/8 shuffle is too fast. How can I set the BPM accordingly so that 6/8 shuffle sounds as the 12/8 at 135? Is there a formula, a rule or something?
Thank you!
UPDATE: Right now, if I set 115 BPM and use 6/8 shuffle, it almost sounds like the speed of the original song, but I am not sure, I have just set it to this value while I was playing.