[linux-audio-dev] Basic MIDI question

[Stéphane LETZ]

Le 24 juil. 06 à 22:38, Lee Revell a écrit :

> 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
>


Midi events in a Midi file are separated by time stamps

see :

http://www.borg.com/~jglatt/tech/midifile.htm

Stephane