Filter device and electronic musical instrument using the filter

Details Filter device and electronic musical instrument using the filter Filter device and electronic musical instrument using the filter

1995-05-02

1996-03-26

Shoop, Jr., William M.

Music

Instruments

Electrical musical tone generation

84DIG9, 36472419, G10H 112, G10H 500

Patent

active

055022774

ABSTRACT:
A filter device has a variable frequency cut-off characteristic as well as a variable gain characteristic. To obtain these characteristics, a filtering operation is performed on data input thereto on the basis of a transmission function, which is defined by gain G for predetermined frequencies and a frequency fo corresponding to a phase at an intersection of a unit circle and a straight line intersecting at right angles a real axis passing a midpoint between a polar and a zero point on the real axis on Z-plane. An electronic musical instrument employing the filter device can change amplitudes of frequency components involved in musical tones on the basis of performance data, generating musical tones involving complex harmonics and having various tone colors, as a conventional acoustic instrument does.

REFERENCES:
patent: 4422156 (1983-12-01), Sano
patent: 4467440 (1984-08-01), Sano et al.
patent: 4489391 (1984-12-01), Morikawa
patent: 4554858 (1985-11-01), Wachi et al.
patent: 4829463 (1989-05-01), Kakishita et al.
patent: 4907484 (1990-03-01), Suzuki et al.
patent: 5081605 (1992-01-01), Janssen
patent: 5089981 (1992-02-01), Cabot
patent: 5103416 (1992-04-01), Cavallotti et al.
patent: 5111417 (1992-05-01), Belloc et al.
patent: 5140541 (1992-08-01), Sakata et al.
patent: 5149902 (1992-09-01), Washiyama
patent: 5157623 (1992-10-01), Hayashi
patent: 5250748 (1993-10-01), Suzuki
patent: 5255215 (1993-10-01), Sakata et al.
patent: 5255702 (1993-10-01), Kido et al.
patent: 5270954 (1993-12-01), Sakata
patent: 5308918 (1994-05-01), Yamauchi et al.

Affiliated with

Also associated with

Rating

Filter device and electronic musical instrument using the filter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Filter device and electronic musical instrument using the filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Filter device and electronic musical instrument using the filter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-917475