Patent ID: 8847058

Claim:
A signal processing device comprising: a signal acquisition unit for acquiring a signal corresponding to a vibration propagated from a string attached to a stringed instrument from an output element for outputting the signal corresponding to the vibration; and a signal processing unit including a filter unit for performing convolution operation using a first filter coefficient and a second filter coefficient set in the filter unit, the signal processing unit for applying the convolution operation to the acquired signal through the filter unit and for outputting a processed signal, the first filter coefficient corresponding to an inverse function of a transfer function of the vibration observed while the vibration is generated by the string and outputted as the signal from the output element, thereby enabling the filter unit to suppress signals other than vibration components of the string, the second filter coefficient corresponding to another transfer function which has a frequency response developing a plurality of peak waveforms corresponding to resonance of a body of another stringed instrument different from the stringed instrument, wherein said another transfer function is calculated based on analysis of a sound received by a microphone positioned relative to said another stringed instrument, the received sound generated from a striking of a bridge part of said another stringed instrument.