Patent ID: 11871191
Assignee: YAMAHA CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. A device for controlling an FIR filter that processes sound signals based on setting of band filter, the device comprising:
an interface configured to receive, from a user, an instruction for control data that indicate a gain parameter of an amplitude characteristic that corresponds to a transfer function represented as a function of angular frequency, and receive an instruction for a gain limit value from the user; and
one or more processors configured to
generate a first amplitude characteristic that indicates an amplitude characteristic of the band filter, as a basis of an amplitude characteristic of the FIR filter, in accordance with the control data,
limit a gain curve of the first amplitude characteristic so as to be within the gain limit value that has been instructed, thereby acquiring a second amplitude characteristic, and
set filter coefficients of the FIR filter based on the second amplitude characteristic,

the one or more processors being configured to limit the gain curve of the first amplitude characteristic so as to be less than or equal to the gain limit value for a band for which the gain curve of the first amplitude characteristic exceeds the gain limit value in an entirety of the first amplitude characteristic, thereby acquiring the second amplitude characteristic, and
the one or more processors being configured to round corners of a generated amplitude characteristic generated by limiting the gain curve of the first amplitude characteristic so as to be within the gain limit value.