Song analysis device and song analysis program

Patent metadata

Field	Value
Publication number	US-11205407-B2
Application number	US-201716641969-A
Country	US
Kind code	B2
Filing date	Aug 29, 2017
Priority date	Aug 29, 2017
Publication date	Dec 21, 2021
Grant date	Dec 21, 2021

Abstract

A music piece analyzer includes: a beat interval acquiring unit configured to acquire a beat interval in music piece data; a candidate detector configured to detect sounding positions where a change amount for sounding is equal to or more than a predetermined threshold in the music piece data, as candidates for sounding positions of a snare drum; and a sounding position determination unit configured to determine that the candidates for the sounding positions at a two-beat interval acquired by the beat interval acquiring unit in the music piece data are the sounding positions of the snare drum, among the candidates for the sounding positions of the snare drum.

First claim

The invention claimed is:

1. A music piece analyzer comprising:
a beat interval acquiring unit configured to acquire a beat interval of music piece data;
a candidate detector configured to detect sounding positions where a change amount for sounding is equal to or more than a predetermined threshold in the music piece data, as candidates for sounding positions of a snare drum; and
a sounding position determination unit configured to determine that the candidates for the sounding positions at a two-beat interval calculated by the beat interval acquiring unit in the music piece data are the sounding positions of the snare drum, among the candidates for the sounding positions of the snare drum.

2. The music piece analyzer according to claim 1 , wherein
the sounding position determination unit determines the sounding positions of the snare drum on a basis of the sounding positions of the candidates at two-beat intervals before and after the candidates.

3. The music piece analyzer according to claim 1 , further comprising:
a high pass filter (HPF) processor configured to subject the music piece data to a high pass filter (HPF) processing.

4. The music piece analyzer according to claim 1 , wherein
the candidate detector acquires differential data of the music piece data in a block per four beats of the music piece data to acquire the change amount.

5. A computer-readable medium that stores a program code configured to enable a computer to function as:
when read and run by the computer
a beat interval acquiring unit configured to acquire a beat interval of music piece data;
a candidate detector configured to detect sounding positions where a change amount for sounding is equal to or more than a predetermined threshold in the music piece data, as candidates for sounding positions of the snare drum; and
a sounding position determination unit configured to determine that the candidates for the sounding positions at a two-beat interval acquired by the beat interval acquiring unit in the music piece data are the sounding positions of the snare drum, among the candidates for the sounding positions of the snare drum.

Assignees

• Alphatheta Corp

Inventors

• Yoshino Hajime
• SABI Toshihisa

Classifications

• G10H2250/055

  Filters for musical processing or musical effects; Filter responses, filter architecture, filter coefficients or control parameters therefor · CPC title

• G10H1/40

  Rhythm · CPC title

• G10G3/04

  using electrical means · CPC title

• G10H1/0008 Primary

  Associated control or indicating means · CPC title

• G10H2210/071

  for rhythm pattern analysis or rhythm style recognition · CPC title