[linux-audio-dev] Basic MIDI question

Lee Revell rlrevell at joe-job.com
Mon Jul 24 16:38:57 EDT 2006


I've never been a MIDI expert but I'm now having to learn.  I have a
question about this excerpt of a MIDI file viewed with hexedit.

00001BB0   22 80 3D 35  31 80 3A 39  0E 80 37 31  03 80 31 1F  ".=51.:9..71..1.
00001BC0   81 0C 90 30  5B 00 90 3C  79 81 70 90  39 73 00 90  ...0[..<y.p.9s..
00001BD0   36 69 4B 80  36 43 0A 80  3C 26 01 80  30 44 0A 80  6iK.6C..<&..0D..
00001BE0   39 42 82 08  90 37 63 00  90 43 7B 81  70 90 3E 5E  9B...7c..C{.p.>^
00001BF0   00 90 3A 66  08 80 37 30  02 80 43 32  31 80 3E 11  ..:f..70..C21.>

Take the sequence "80 3D 35  31 80 3A 39  0E 80 37 31  03 80 31 1F" in
the first line for example.  I know that 0x80 is note-off, and 0x3D are
note number and 0x35 the velocity of the note-off.  But what the heck is
the next byte, 0x31?  The MIDI standard says note-off is one status byte
followed by 2 data bytes!

Lee



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