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Published papers on the data:
Analysis of a Buzz Stroke
Snare Drumming Preliminary Results
Rudimental Coordination: From Snare to Set
The analysis of the 3 drummers who participated in the experiment are as follows:
1. Average of Position of Basic Strokes
2. Average of Position of Rudiments via basic stroke breakdown
3. Difference of positions based on basic stoke breakdown of rudiments
4. Overall analysis through triangulation of movement: Possible sin(x) or cos(x) reduction
The Rudiments are a subset of the Basic Strokes.
The Basic Strokes are a subset of the Positions.
Positions: Rest, Up, Tap
The rest position is when a mode occurs in the data. While the mode for each anatomical marker vector differ in time, the time in which a mode occurs for all anatomical markers and vectors are close in time; meaning the rest position is reflected by the occurrence of the mode in a five number summary for a data set.
The up position refers to the maximum displacement value in the z (up and down) for the wrist specifically. While the origin of the stroke is at the shoulder (mainly from the scapula), the wrist determine the distance of the stick from the drum in the z-vector.
The tap position refers to the wrist when the minimum displacement value occurs in a sequence for the z-vector. This position in time is closely related to the stick hitting the drum.
The data for each drummer can be categorized by these three phenomena which map onto the traditional pedagogical terms used in snare drumming. The data is analyzed through this lens of maximum (up position), minimum (tap position), and mode (rest position). The other components of the five number summary used without a mapping of meaning to pedagogical snare drumming terminology.
Basic Stroke Types: Full, Up, Down, Tap, Buzz
Full Stroke: Rest->Up->Tap->Rest
Up Stroke: Rest->Tap->Up->Rest
Down Stroke: Rest->Up->Tap->Rest
Tap Stroke: Rest->Tap->Rest
Buzz Stroke: Rest->Up->Tap(n)->Rest
(n) denotes the number of times the stick makes contact with the head within one