The file to make the sound may only be 1kb, but the application to replay it is probably Megabytes (and I'm not sure just how many clarinet solos you are going to want to walk around with!).

This is like saying that a MIDI file can do an entire piano concerto in a few kb's, while ignoring the gigabytes of data needed to play it...

BTW, anyone notice the date of this 'announcement'?
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An arranger is just a tool. What matters is what you build with it..!