Acoustic effect apparatus and method and program recorded...

Details Acoustic effect apparatus and method and program recorded... Acoustic effect apparatus and method and program recorded...

2005-01-18

2005-01-18

Mei, Xu (Department: 2644)

Electrical audio signal processing systems and devices

Including frequency control

C381S061000, C381S062000, C381S101000, C381S118000

Reexamination Certificate

active

06845165

ABSTRACT:
A high pass filter32having a cut-off frequency of 200 Hz and a cut-off response of +12 dB/OCT and a low pass filter33having a cut-off frequency of 400 Hz and a cut-off response steeper than −24 dB/OCT are used to pick out components in a double overtone region of 200˜400 Hz of a bass musical instrument such as a base or a bass drum from an input audio signal. The component which is picked out is input to distortion applying means34having an input-output response which is a non-linear response having no point symmetry with respect to 0 point, thus applying a distortion to cause even-numbered overtone components to be produced. An output from the distortion applying means34and the input audio signal are summed in a summer18to be delivered. Natural tones which have boosted bass tones and which are free from impurity are obtained.

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