Roland Corporation

Toshiyuki Ochi

Yoshinobu Morimoto

Mitsuo Shida

Kosuke Takada

An amplifier includes an amplification section for amplifying a musical tone signal input from an electric musical instrument. A plurality of speakers are connected to the amplifier. The amplifier includes a selection section selecting a speaker for outputting the musical tone signal amplified by the amplification section, among the plurality of speakers, a storage section storing a characteristic adjustment value which is a value for adjusting an output impedance characteristic or an input impedance characteristic of the amplifier according to a characteristic of the speaker for each of the plurality of speakers, an acquisition section acquiring the characteristic adjustment value corresponding to the speaker selected by the selection section from the characteristic adjustment values stored in the storage section; and a characteristic adjustment section adjusting the output impedance characteristic or the input impedance characteristic based on the characteristic adjustment value acquired by the acquisition section.

Amplifier connected with a plurality of speakers

An audio processing device includes: a first low-pass filter (LPF) to which an audio signal is input; a circuit to which the audio signal is input, including a first high-pass filter (HPF) and a preamplifier; a second HPF to which the audio signal is input; a second LPF to which an output signal of the circuit is input; an extractor, extracting each of an output signal of the first LPF, an output signal of the second HPF, and an output signal of the second LPF at a predetermined ratio; and a mixer, mixing the output signal of the first LPF, the output signal of the second HPF, and the output signal of the second LPF that are extracted.

Audio processing device, amplifier device, and audio processing method

A guitar amplifier and a control method of a guitar amplifier in which a setting of a performance mode can be easily changed without an interruption to a sound is provided. The guitar amplifier, which performs musical sound processing on an input musical sound and outputs it, includes a storage device which stores a plurality of information sets including a set value for each of one or two or more types of musical sound processing used in a performance mode, and a control device which changes the setting of the one or two or more types of musical sound processing to a setting according to a set value of a selected information set when information indicating ON of the performance mode, to which the selected information set from the plurality of information sets has been applied, is input.

Guitar amplifier and control method of guitar amplifier

A distortion imparting device capable of obtaining a natural distortion effect even when output is decreased is provided. The distortion imparting device includes a first amplification part which attenuates an input audio signal on the basis of an attenuation factor set by a user and amplifies the attenuated audio signal, a second amplification part serially connected to the first amplification part, and a limiting part which is connected between an output terminal of the first amplification part and an input terminal of the second amplification part and limits an input voltage of the second amplification part to a predetermined clip voltage, wherein the limiting part determines the clip voltage on the basis of the attenuation factor.

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Shizuoka, Japan

Toshiyuki Ochi