Tone signal processing device using a digital filter

Details Tone signal processing device using a digital filter Tone signal processing device using a digital filter

1987-10-30

1990-03-13

Witkowski, Stanley J.

Music

Instruments

Electrical musical tone generation

84DIG9, 84622, 84629, 84663, 3647241, 381 51, G10H 112, G10H 700

Patent

active

049074849

ABSTRACT:
At least two sets of filter coefficients corresponding to different filter characteristics are interpolated by using a control signal for controlling tone color as a parameter of interpolation. Filter coefficients obtained by the interpolation are supplied to a digital filter to determine its filter characteristics and an input tone signal is modified in accordance with the filter characteristics thus determined. Filter characteristics of diverse variation as compared with the number of prepared filter coefficients can thereby be realized. Further, timewise change of filter characteristics can be realized by changing a parameter of interpolation with lapse of time or changing two sets of filter coefficients to be interpolated with lapse of time. Designation of filter coefficients can be made by designating coordinate data of coordinates having at least two axes. In this case, filter coefficients can be changed by changing coordinate data of at least one axis in accordance with tone color control information whereby filter characteristics can be variably controlled.

REFERENCES:
patent: 4184402 (1980-01-01), Kugisawa
patent: 4416179 (1983-11-01), Wachi
patent: 4554858 (1985-11-01), Wachi et al.
patent: 4638709 (1987-01-01), Nagashima et al.
patent: 4677889 (1987-07-01), Deutsch
patent: 4715257 (1987-12-01), Hoshiai et al.
patent: 4738179 (1988-04-01), Hideo
patent: 4779505 (1988-10-01), Suzuki
patent: 4829463 (1989-05-01), Kakishita et al.

Affiliated with

Also associated with

Rating

Tone signal processing device using a digital 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 Tone signal processing device using a digital filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tone signal processing device using a digital filter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-44666