Speaker distortion reduction

A system for processing an audio signal to reduce loudspeaker distortion, the system comprising:

• a pitch and salience estimator, the pitch and salience estimator being configured to determine a main frequency of an input signal;
• a phase tracker configured to determine phases of harmonic frequencies relative to the main frequency;
• and
• a target phase generator configured to generate poles and zeros based on the main frequency and to dynamically generate one or more filter coefficients for changing the harmonic frequencies with respect to the main frequency.

A method for processing an audio signal to reduce loudspeaker distortion, the method comprising:

• receiving an input signal;
• analyzing the input signal using a cochlea module comprising a series of band-pass filters, the analyzing performed based on a linear model specific to a type of loudspeaker and comprising estimating pitch and salience of the input signal, determining a main frequency of the input signal and tracking phases of harmonic frequencies relative to the main frequency, and determining poles and zeroes of the harmonic frequencies;
• based on the analysis, dynamically producing a filter for applying to the input signal by generating filter coefficients for shifting the harmonic frequencies in the input signal;
• and
• applying the filter to the input signal to produce a filtered signal for providing to the loudspeaker.