On Sat, Feb 10, 2018 at 7:48 PM, Martin Peach <[email protected]> wrote:
> On Sat, Feb 10, 2018 at 1:49 PM, tim vets <[email protected]> wrote: > >> I seem to be getting closer >> [255 81 3 $1 $2 $3( seems to do the trick, (the 3 was necessary to >> designate the 3 following bytes...) >> still not sure why [255 81 3 7 161 32( does not result in 120bpm but >> "120qpm" and 80bpm... >> > > Probably because numbers greater than 127 must be formatted in > 'variable-length quantity' form, where the number is broken up into 7-bit > pieces and all the pieces except the last have the high bit set, so decimal > 500000 in hex is 7A120, or in binary 1111010000100100000, becomes 10011110 > 11000010 00100000, or 158 194 32 (if I didn't make any mistakes along the > way). Using calculator in programmer mode is useful here. > But for meta events, numbers are stored as is, in big-endian order, not as variable-length,, so [ 255 81 3 7 161 32 ( should work properly. Martin
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