US 12,284,496 B2
Audio processing device, amplifier device, and audio processing method
Toshiyuki Ochi, Shizuoka (JP); and Yoshinobu Morimoto, Shizuoka (JP)
Assigned to Roland Corporation, Shizuoka (JP)
Filed by Roland Corporation, Shizuoka (JP)
Filed on Sep. 26, 2022, as Appl. No. 17/952,323.
Claims priority of application No. 2021-174834 (JP), filed on Oct. 26, 2021.
Prior Publication US 2023/0125554 A1, Apr. 27, 2023
Int. Cl. H04R 3/04 (2006.01); H03F 3/183 (2006.01)
CPC H04R 3/04 (2013.01) [H03F 3/183 (2013.01); H03F 2200/03 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An audio processing device, comprising:
a first low-pass filter to which an audio signal is input;
a circuit to which the audio signal is input, comprising a first high-pass filter and a preamplifier;
a second high-pass filter to which the audio signal is input;
a second low-pass filter to which an output signal of the circuit is input;
an extractor, extracting each of an output signal of the first low-pass filter, an output signal of the second high-pass filter, and an output signal of the second low-pass filter at a predetermined ratio;
a mixer, mixing the output signal of the first low-pass filter, the output signal of the second high-pass filter, and the output signal of the second low-pass filter that are extracted by the extractor; and
a first effect imparter, inputting the audio signal obtained by imparting an effect to an input audio signal to each of the first low-pass filter and the second high-pass filter.