Constant speed polyphonic portamento system

Details Constant speed polyphonic portamento system Constant speed polyphonic portamento system

1980-11-03

1982-10-19

Truhe, J. V.

Music

Instruments

84 103, G10H 102

Patent

active

043544142

ABSTRACT:
A keyboard operated electronic musical instrument with polyphonic portamento and glissando effects in which each key controls one of a number of tone generators through a table of frequency numbers. The frequency transitions are achieved by subtracting the frequency number of a new note from the frequency number controlling the current frequency of an assigned tone generator. A predetermined fraction of the difference is stored in increment registers and added successively to the frequency numbers of the current notes until these numbers are equal to the frequency number of the new note. The addition rate, which determines the frequency transition time, is adjustable by means of a variable frequency time clock. The assignment of the tone generators to the actuated keyswitches is accomplished in a manner which prevents objectionable frequency cross-over transitions even when the number of notes in successive chords is changed.

REFERENCES:
patent: 4131049 (1978-12-01), Okumura et al.
patent: 4240318 (1980-12-01), Gross

Affiliated with

Also associated with

Rating

Constant speed polyphonic portamento system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Constant speed polyphonic portamento system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constant speed polyphonic portamento system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1334200