Effects device and effects processing method
AssigneeRoland Corporation
InventorShinji Tomita
Life of this patent
Estimating the term…
Abstract
An input musical sound signal is input to band pass filters, and pass musical sound signals for each sound pitch are acquired. Total level ratios based on a total of levels of a sound pitch lower than those of the pass musical sound signals are calculated from the levels that are levels of the pass musical sound signals, and output coefficients are acquired on the basis of the total level ratios. Levels of octave musical sound signals acquired by converting the pass musical sound signals into sound pitches lower than those of the pass musical sound signals by one octave are multiplied by the output coefficients. In accordance with this, the octave musical sound signals of a low sound pitch can be extracted from among the octave musical sound signals.
Claims18
An effects device connected to a guitar with a plurality of strings comprising:
- a digital signal processor;
- and
- an analog digital converter connected to the digital signal processor, wherein the digital signal processor configured to:
- input a musical sound signal of the strings of the guitar generated by guitar playing converted by the analog digital converter;
- detect a level of the musical sound signal input by the digital signal processor for each of multiple frequency bands;
- extract a frequency characteristic of the musical sound signal based on the level of the musical sound signal detected by the digital signal processor;
- add a predetermined sound effect only to a lowest frequency band of the musical sound signal based on the frequency characteristic of the musical sound signal extracted by the digital signal processor;
- and
- calculate, for each multiple frequency bands, a total of the level, which are detected by the digital signal processor, of frequency bands lower than the frequency band,
- wherein the digital signal processor is configured to extract a frequency characteristic of the musical sound signal according to a frequency band for which the total is smaller than a predetermined value among the totals for each frequency band calculated by the digital signal processor based on the level of the musical sound signal detected by the digital signal processor.
An effects processing method comprising:
- inputting a musical sound signal of a guitar converted by an analog digital converter;
- detecting a frequency characteristic of the musical sound signal of the guitar by a digital signal processor;
- conducting an octave processing, only for frequency band corresponding to a lowest string among a plurality of strings of the guitar, to the musical sound signal of the guitar, based on the detecting of the frequency characteristic by the digital signal processor, and
- calculating, for each multiple frequency bands, a total of the level, which are detected by the digital signal processor, of frequency bands lower than the frequency band,
- wherein the digital signal processor is configured to extract a frequency characteristic of the musical sound signal according to a frequency band for which the total is smaller than a predetermined value among the totals for each frequency band calculated by the digital signal processor based on the level of the musical sound signal detected by the digital signal processor.
An effects processing method comprising:
- inputting a musical sound signal of strings of a guitar generated by guitar playing converted by an analog digital converter;
- detecting a level of the musical sound signal input in the inputting of a musical sound signal for each of multiple frequency bands by a digital signal processor;
- extracting a frequency characteristic of the musical sound signal based on the level of the musical sound signal detected in the detecting of a level of the musical sound signal by the digital signal processor;
- and
- adding a predetermined sound effect only to a lowest frequency band of the musical sound signal based on the frequency characteristic extracted in the extracting of a musical sound signal by the digital signal processor;
- and
- calculating, for each multiple frequency band, a total of the level, which is detected in the detecting of the level of the musical sound signal, of frequency bands lower than the frequency band,
- wherein, in the extracting of a frequency characteristic, the frequency characteristic of the musical sound signal is extracted according to a frequency band for which the total is smaller than a predetermined value among the totals for each frequency band calculated in calculating of an total based on the level of the musical sound signal detected in detecting a level of the musical sound signal.
Dependencies are inferred from the claim text.