Delay time modulation effecting apparatus for processing musical

Details Delay time modulation effecting apparatus for processing musical Delay time modulation effecting apparatus for processing musical

1994-09-02

1996-09-24

Shoop, Jr., William M.

Music

Instruments

Electrical musical tone generation

84629, G10H 104, G10H 700

Patent

active

055593003

ABSTRACT:
A delay-time-modulation effecting apparatus employed by an electronic musical instrument or the like, is designed to effect a certain delay-time modulation on a musical tone signal so as to realize a desired modulation effect appear on a musical tone to be produced. The delay-time modulation is effected in response to a time lag between a write time and a read time at which the musical tone signal is written into and is read from a storage device (e.g., random-access memory). When a read address advances fast to be ahead of the write address, an overmodulation state emerges so that discontinuity in level of the musical tone signals occurs, which will result in an occurrence of noises. In order to avoid such an event, the read address should be limited not to advance ahead of the write address. Herein, the write address is generated in such a manner that the number thereof is circulatorily varied in a lapse of time within a certain address range, while the read address is generated by performing a computation using the modulation data and an offset address. The modulation data is generated in response to a desired modulation effect to be realized. The apparatus provides an address-limit circuit, which is activated when the overmodulation state is detected so that the read address is limited not to advance ahead of the write address. Thus, the occurrence of noises can be avoided.

REFERENCES:
patent: 4569268 (1986-02-01), Futamase et al.
patent: 5243658 (1993-09-01), Sakata

Affiliated with

Also associated with

Rating

Delay time modulation effecting apparatus for processing musical does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Delay time modulation effecting apparatus for processing musical, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Delay time modulation effecting apparatus for processing musical will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1930137