john stoecker matt wright sheena chandran
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John Stoecker Matt Wright Sheena Chandran. Emotive Motion: analysis of expressive timing and body movement in the performance of an expert violinist. Overview:. Goals/Hypotheses Data Collection Data Analysis Anticipated Results. Goals. - PowerPoint PPT PresentationTRANSCRIPT
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Emotive Motion: analysis of expressive timing and body movement in the performance of an expert violinist
John Stoecker
Matt Wright
Sheena Chandran
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Overview:
Goals/Hypotheses Data Collection Data Analysis Anticipated Results
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Goals observe the variation of joint kinematics using
the common violin bowing techniques legato Marcato Spiccato Ricochet pizzicato
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Goals (cont.)
use sonification to show how timing of violinist’s motion corresponds to the temporal evolution of the music
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Background: Timing and Tempo Each note has a duration A beat is when you’d tap your foot Tempo is the rate of beats (“beats per minute”) A tempo curve is the tempo as a function of time
speeding up and slowing down Deviation: note slightly earlier or later than
expected Expressive timing: tempo curves, deviation,
etc., are important elements of musical expression
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Hypothesis One
The greater the magnitude of the “expression” (the greater a section’s deviation from the metronomic standard), the larger the non-musical body movement
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Hypothesis Two
The periodicity of various body parts will relate to the periodicity of differing levels of the music (such as note, beat, measure, phrase, and section)
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Data collection Using:
An 8 camera 3-D motion capture system
A force plate A gazillion reflective
markers (thanks, Erin!)
A famous violinist A pair of hot shorts
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Data collection (cont.) We gathered force
plate and motion capture data of: Bowing techniques 8 performances of
J.S. Bach’s Chaconne (the fourth and final movement of Bach’s second Partita)
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Data collection (cont.) Emotions:
Normal Angry Trepidation Mournful Playful Searching No Emotion Least Motion
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Performance Video In this clip you will
see Barry Shiffman, the second violinist for the St. Lawrence String Quartet perform an excerpt of J.S. Bach’s Chaconne joyfully.
QuickTime™ and aDV/DVCPRO - NTSC decompressor
are needed to see this picture.
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Data Analysis
Programs Used:
Matlab
Audacity
PureData
MaxMSP
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From Note Duration to Tempo Note “duration” = time between this note’s
beginning and the next note’s beginning. (“Inter-onset interval”)
If every eighth note is 400ms, then in a minute there would be 60 sec / 0.4 sec = 150 eighth notes.
This means 75 BPM (since an eighth note is half of a beat)
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Results and Sonification
Hypothesis One: the greater a section’s deviation from the metronomic standard, the larger the non-musical body movement
Hypothesis Two: the periodicity of various body parts will relate to the periodicity if differing time levels of the music (such as note, beat, measure, and phrase)
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Acknowledgments
Prof. Jonathan Berger
Erin Butler
Sarah Emerson
Dr. Amy Ladd
Jonathan Norton
Dr. Jessica Rose Agramonte
Barry Shiffman
Kingsley Willis
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Any Questions?