Coefficient measurement apparatus, effect impartment apparatus, and musical sound generating apparatus

摘要

In a coefficient measurement apparatus, a line input terminal receives a pickup signal that is generated based on a string vibration of a musical instrument. A microphone input terminal receives a microphone signal acquired by a microphone that collects sounds of the musical instrument. An adaptive filter estimates a transfer function associated to resonance of the musical instrument and a transfer function of an acoustic space formed from the musical instrument to the microphone, generates an output signal by processing the pickup signal using the estimated transfer function, and updates the transfer function using a difference between the output signal and the microphone signal as a reference signal.

主权项

1. A coefficient measurement apparatus comprising:
a line input terminal that receives a pickup signal that is generated based on a vibration of a musical instrument; a microphone input terminal that receives a microphone signal acquired by a microphone that collects sounds of the musical instrument; and an adaptive filter that estimates a transfer function associated with resonance of the musical instrument and an acoustic space formed from the musical instrument to the microphone by
generating an output signal by processing the pickup signal using the filter coefficients,outputting a reference signal based on a difference between the output signal and the microphone signal; andbeing capable of continuously updating the filter coefficients using the reference signal to cause the output signal to approach the microphone signal.