In the first bar (bar 9), the L-shaped bracket on beat 1 is a suggestion to play the A# with the RH. The next beat has a bracket indicating to play the B with the LH (and probably nobody is going to stretch from B all the way up to high F#). But what about the meaning of the 3 complete brackets in the next bar (F# to A#) etc.? The numbering seems to indicate that A# and C# should be played with 1 and 5 in the RH. #music #audio