Yamaha Corporation

Morrison & Foerster Llp

Mitsutaka Gotoh

Akio Suyama

Satoshi Takemura

Makoto Hiroi

Mizuyuki Shirai

Takaaki Makino

Yuji Yamashita

An acoustic signal's high frequency component extracted by an HPFis multiplied in a multiplierby the first coefficient to control the level of the high frequency component. The first coefficient is generated by a coefficient generation portionin accordance with the full band level of an output signal. A low frequency component extracted by an LPFis multiplied in a multiplierby the second coefficient to control the level of the low frequency component. The second coefficient is generated by a coefficient generation portionin accordance with the level of the output signal's low frequency component extracted by an LP filter. The level control of the low frequency component of the output signal and the level control of the high frequency component of the output signal are done separately, resulting in the loudness control which is suitable for the characteristic of the acoustic signal.

Acoustic signal processing apparatus

A digital audio device has a plurality of input ports that are provided with a plurality of digital audio signals. A plurality of extraction parts extract a clock signal from the digital audio signal, when the clock signal is superimposed in the digital audio signal provided to corresponding input ports. A first selection part selects the extracted clock signal as a word clock when the clock signal is extracted by any one of the plurality of the extraction parts. A frequency storage part stores a frequency of the clock signal selected by the first selection part. An internal clock generator outputs a clock signal having a frequency as specified. A second selection part selects the clock signal output from the internal clock generator as a word clock when no clock signal is extracted by the plurality of the extraction parts, the frequency of the clock signal output from the internal clock generator being set to the frequency stored in the frequency storage part. A reception part receives the digital audio signals provided to the plurality of the input ports in synchronization with the word clock selected by one of the first selection part and the second selection part.

Digital audio device

As preset component data to perform processing on components for signal processing in a mixer engine, data for PC and data for transfer to be transferred to the mixer engine to cause the engine to perform signal processing are stored on the PC side, and data for engine is stored on the mixer engine side. When being directed to upgrade the preset component data on the mixer engine side, the PC compares the ID of each component included in the data for PC stored in the PC with the ID of each component included in the data for engine stored in the mixer engine, and, when detecting an ID existing only in the former, transfers the aforementioned data for transfer on the component corresponding to the ID to the mixer engine and causes the engine to store the data as the data for engine.

Component data managing method

Growing community of inventors

Hamamatsu, Japan

Mitsutaka Gotoh