Yamaha Corporation

Hideyuki Tokuhisa

Ryotaro Aoki

An audio signal processing device includes: an input section to which an audio signal is input; a bias processing section configured to add a bias signal to the audio signal; a calculation section configured to perform a power calculation on the audio signal to which the bias signal has been added by the bias processing section; and an adding unit configured to add the audio signal on which the power calculation is performed by the calculation section to the audio signal having been input to the input section.

Audio signal processing device

An audio signal processing device is designed to enhance the low-pitch register of an audio signal by generating harmonics causing a missing fundamental effect with a light load of processing but without damaging an audio waveform. The audio signal processing device includes a filtering part (e.g. a band-pass filter configured of a high-pass filter and a low-pass filter) that extracts a low-pitch signal from an audio signal input thereto; a dynamic range compression part that compresses a dynamic range of the low-pitch signal by use of a time-variant gain relative to a peak of the low-pitch signal, which is detected via a peak hold operation using a predetermined time constant, thus producing a compressed signal; and an adder that adds the compressed signal to the audio signal so as to produce a processed audio signal including harmonics.

Audio signal processing device with enhancement of low-pitch register of audio signal

A DSP programming apparatus capable not only of reducing work load for software engineers at the time of doing DSP programming but also of modularizing commonly usable algorithms, as well as to provide a DSP device capable of storing programs prepared by the DSP programming apparatus. A module storage unit stores a plurality of modules on a function basis in advance, and modules are linked by combining on a display screen through a GUI (graphical user interface) function by an input section. The linked DSP programs are converted into a DSP microprogram in executable form by a microprogram preparing section, and the microprogram is then transferred to a DSP through a transfer section.

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Iwata, Japan

Hideyuki Tokuhisa