Automatic player musical instrument, noise suppressor...

Details Automatic player musical instrument, noise suppressor... Automatic player musical instrument, noise suppressor...

2008-06-24

2008-06-24

Donovan, Lincoln (Department: 2837)

Music

Instruments

Electrical musical tone generation

C084S653000, C084S013000

Reexamination Certificate

active

07390956

ABSTRACT:
Black/white keys are selectively moved by key actuators energized with a driving signal in a playback mode, and plunger sensors, which are provided inside of the key actuators, report the measured values of the keystroke to a motion controlling section; since the measured values contain error due to the deformation of the keys, the motion controlling section estimates true values or estimated values of the keystroke by dividing the sum of products between the measured values and weighting factors by a normalizing constant, and compares the estimated values with target values to see whether or not the keys exactly travel on reference trajectories; if the answer is negative, the motion controlling section varies the duty ratio of the driving signal so as to accelerate or decelerate the keys.

REFERENCES:
patent: 5254804 (1993-10-01), Tamaki et al.
patent: 5652399 (1997-07-01), Fujiwara et al.
patent: 5691489 (1997-11-01), Fujiwara et al.
patent: 6051762 (2000-04-01), Fujiwara et al.
patent: 6111174 (2000-08-01), Oba et al.
patent: 7-175472 (1995-07-01), None

Affiliated with

Also associated with

Rating

Automatic player musical instrument, noise suppressor... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic player musical instrument, noise suppressor..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic player musical instrument, noise suppressor... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2797765