Patent ID: 11889280
Assignee: CIRRUS LOGIC INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 24:
25. An audio playback device, comprising:
an audio input for receiving an input audio signal from an audio source;
an tuning input for receiving a tuning signal configurable by a user of the audio playback device;
an audio output for delivering a filtered audio signal to an audio output device;
a filter chain comprising a plurality of filters for filtering the input audio signal to produce the filtered audio signal, the filter chain comprising:
a first filter module operating at a first sampling rate; and
a second filter module operating at a second sampling rate greater than the first sampling rate,

wherein a phase response of the first filter module is dependent on the tuning input and wherein a magnitude response of the first filter module is substantially independent of the tuning input.