WOW!  Thanks, John!  (I want to get Jay Kyle's performance out so I 
can show it to folks as MP3.  That's what iPod's are for! :-)

Mark

>Mark,
>
>The problem was that MIDI files can contain tempo changes. The default
>tempo is 120 quarter notes/minute, but both this tempo and the the 
>ticks/quarter
>note can be set. Some MIDI files contain many changes of tempo throughout
>the file.
>
>Attached is a changeset that takes these tempo changes into account. It worked
>on several MIDI files I tried, including one with dozens of tempo changes. Let
>me know if you have are any problems. I've submitted it to the changes stream,
>so it will come out with the next batch of updates.
>
>By the way, I also added menu commands ot the ScorePlayerMorph so you can
>save a MIDI performance to a WAV, AIFF, or Sun audio file from a menu command.
>All your instrument, track volume and pan, and tempo settings are 
>followed. (Reverb
>is NOT, I realized this morning. There's always something more to be done...)
>
>Those changes are also in the update stream. Plus, saving as and 
>audio file is quite
>a bit faster than before.
>
>Next time you teach your Squeak audio class, it will be even easier 
>to save performances
>as audio files...
>
>	-- John
>
>
>At 4:09 PM -0500 12/14/01, Mark Guzdial wrote:
> >If you create a composition in Squeak with MIDI and you want to
> >output the whole thing to MP3, the attached code lets you output the
> >Score to WAV for conversion elsewhere.  The current version DOES
> >generate the MIDI as WAV, but it also pads the end with LOTS (!!) of
> >blank space.  I think that durationInTicks is over-estimating in
> >ScorePlayer, but this at least works.
> >
> >Mark
>
>Attachment converted: Guz G4:MIDIStoreWAV-jm.cs (TEXT/R*ch) (00075F9C)

--------------------------
Mark Guzdial : Georgia Tech : College of Computing : Atlanta, GA 30332-0280
Associate Professor - Learning Sciences & Technologies.
Collaborative Software Lab - http://coweb.cc.gatech.edu/csl/
(404) 894-5618 : Fax (404) 894-0673 : guzdial at cc.gatech.edu
http://www.cc.gatech.edu/gvu/people/Faculty/Mark.Guzdial.html