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List:       lilypond-devel
Subject:    Re: midi performance hacking
From:       Mats Bengtsson <mats.bengtsson () s3 ! kth ! se>
Date:       2004-04-20 8:30:47
Message-ID: 4084DFB7.1000909 () s3 ! kth ! se
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>>Regarding your previous email on restructuring the MIDI support, I hope
>>you can also solve the following bug report:
>>http://mail.gnu.org/archive/html/bug-lilypond/2003-10/msg00069.html
> 
> 
> I would like to fix that one as well, and should be pretty easy to
> do.  I think I will look at this next.  What I have read
> (<URL:http://www.borg.com/~jglatt/> is a good source) seems to
> indicate that tempo should be in track zero.
> 
> <URL:http://www.borg.com/~jglatt/tech/midifile/tempo.htm> reads:
> 
> In format 1, the very first MTrk should consist of only the tempo (and
> time signature) events so that it could be read by some device capable
> of generating a "tempo map". It is best not to place MIDI events in
> this MTrk.

I'm not an expert in MIDI, but from Nigel's answer in the email I
refered to, it seems clear that tempo changes should be done in all
tracks, not only in track zero (as is done today).

    /Mats



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