[linux-audio-user] Progressive Quantisation (long)

Mark Knecht markknecht at gmail.com
Tue Jun 13 21:20:50 EDT 2006

On 6/13/06, Folderol <folderol at ukfsn.org> wrote:
> Well I don't know if this term actually exists or if I've just invented
> it!
> This is an idea I've thought about for quite some time, years in fact,
> but don't have the programming ability to try to put it into practice.
> As I think it should really be part of, or a plugin to a sequencer I've
> posted to LAU & Rosegarden lists. I hope nobody minds. I'd be very
> interested in other people's thoughts on it.
> What I would like to see is quantisation algorythm the detects trends
> rather than absolute values, then progressively applies small
> corrections the keep overall timing correct. (it would of course have
> to operate over all tracks simultaneously).


It's very funny but I went out for tea and to read a book this
afternoon. As I was sitting in a local shop I was having some related
ideas WRT MIDI drum tracks. I was thinking at the time more about
languages to describe complete songs but there is an aspect you might
want to consider yourself here, should any of this lead toward a tool
of some type.

I've recorded to MIDI some electronic drum kits in the past. I own a
DrumKat which is fun to play with. One thing I think that makes MIDI
drum tracks sound more real, and unfortunately very few drum
programmers are ever willing to do, is when they have the 'ghost
notes' that come from real drumming. I.e. - the stick hits the snare,
bounces up, and then hits the snare a second time at a much lower
volume. Try it yourself with a pencil on a table (or a stick on a drum
pad) and you'll almost immediately discover it's often the ghost notes
that add the most life to your beats. Notice that as you change the
tempo the distance between the main hit and the ghost note doesn't
vary the same way as the tempo slows since the ghost note comes from
the way you hold the pencil & the weight of the pencil, etc.

Anyway, the thought I was having had to do with the need to discover
which hits were intended to be on the beat, whatever that is, and
which hits where these ghost notes. IMHO a good tool for changing MIDI
tempo would determine which is which and would vary the tempo without
making huge changes to the time between the main hit and it's ghost.


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