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Re: Rhythm perception
We were discussing rhythm patterns the other day and the question came
up about how one determined the start of a pattern. If there is a
heavy emphasis on one beat of the sequence then I can understand that
that is taken as the first beat.
But if the sequence is unemphasised how does one decide? Or do
people decide differently, or is it cultural?
I am not sure where to start to look -- as ever this is outside my
general field of study -- but I though this list might be the place
to ask for clues.
I hope I have explained the question sufficiently!
As far as I am aware the two most successful systems to date for extracting
information about musical measures are by Klapuri and Goto (Klapuri being
the better). These both identify the foot tapping rate or tactus as its
called and also the start of each measure. The system by Goto relied on
detecting chord changes and Klapuris system looked for rythmic
fluctatuations in the signals amplitude i.e. low,loud,-,loud.
However, both these relied on their being some form of emphasis/change and
were designed for primarily western popular music. If the sequence is
unemphasisied then I suppose it really is a purely subjective decision
based on experience and culture.
The papers I have mentioned are
http://staff.aist.go.jp/m.goto/PROJ/bts.html No.9 on page
Hope this helps as this is also a problem that has been troubling me
recently i.e. given a peice of music how do we reliably regocnise the start
of each measure ?