Download On comparison of phase alignments of harmonic components
This paper provides a method for comparing phase angles of harmonic sound sources. In particular, we propose an algorithm for decomposing the difference between two sets of phases into a harmonic part, which represents the phase progress of harmonic components, and a residue part, which represents all causes of deviations from perfect harmonicity. This decomposition allows us to compare phase alignments regardless of an arbitrary time shift, and handle harmonic and noise/inharmonic parts of the phase angle separately to improve existing algorithms that handles harmonic sound sources using phase measurements. These benefits are demonstrated with a new phase-based pitch marking algorithm and an improved time-scale and pitch modification scheme using traditional harmonic sinusoidal modelling.
Download Extraction of Metrical Structure from Music Recordings
Rhythm is a fundamental aspect of music and metrical structure is an important rhythm-related element. Several mid-level features encoding metrical structure information have been proposed in the literature, although the explicit extraction of this information is rarely considered. In this paper, we present a method to extract the full metrical structure from music recordings without the need for any prior knowledge. The algorithm is evaluated against expert annotations of metrical structure for the GTZAN dataset, each track being annotated multiple times. Inter-annotator agreement and the resulting upper bound on algorithm performance are evaluated. The proposed system reaches 93% of this upper limit and largely outperforms the baseline method.