Feature exaggeration in scale performance on the piano
Shinya Morita, Norio Emura, Masanobu Miura, Seiko Akinaga, Masuzo Yanagida · The Journal of the Acoustical Society of America · 2008
This paper proposes a set of parameters for describing features of scale-playing on the piano. The parameter set consists of 15 parameters, among which 12 are three sets of four parameters pi1 through pi4 where i ={1, 2, 3} distinguishes three basic features; onset time, velocity, and duration. Each of these basic features is modeled as the sum of a global curve and the deviation from it, where the spline interpolation is employed using locally averaged points, or representative points, as the points to be passed. The local average is calculated for each sequence of notes played without finger crossing. The suffix j in pij distinguishes the standard deviations (j=0), the rms deviation from the spline curve (j=1), the range of the curve (j=2), the rms difference between successive notes (j=3), and the rms of the spline curve from the metronomic line (j=4). All parameters are made controllable with slider bars from 0% to 200% for synthesizing suppressed performance or exaggerated performance, where 100% represents the original performance. Proposed parameter set is expected to be useful in self-training of piano, as it can indicate the features and undesirable habits of the player by setting values above 100% in exaggerated form.