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Re: jazz quantization of eighths for MIDI
From: |
Peter Chubb |
Subject: |
Re: jazz quantization of eighths for MIDI |
Date: |
Mon, 15 Sep 2008 14:17:42 +1000 |
User-agent: |
Wanderlust/2.14.0 (Africa) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (Gojō) APEL/10.7 MULE XEmacs/21.4 (patch 21) (Educational Television) (x86_64-linux-gnu) |
>>>>> "Werner" == Werner LEMBERG <address@hidden> writes:
Werner> Is there any possibility to implement a function which does
Werner> this conversion for MIDI output?
Not just Jazz. Early music does the same (look up inégalité). It's
on my TODO list for the improved MIDI script, but I think it's a bit
hard to do in Scheme (need to do look-ahead in the list of chords),
and anyway I have no time to work on it at present.
What I'd like to see is a general rubato function, that:
1. takes a parameter (maybe call it `swing') that lengthens on-beat
phrases, and shortens off-beat phrases by the same amount (so convert
a8 b to \times 2/3 { a4 b8 } or { a8 b16 c } to \times 2/3 {a4 b16 c}
or similar)
2. Within phrasing slurs does a slight accelerando into the phrase
and a slight decelerando to a-tempo at the end
But I couldn't work out how to code it in scheme.
Peter C