| 摘要 |
<p>An audio signal processing system for use with a stringed musical instrument, for exemple a guitar, includes a transducer assembly (1) comprising a respective transducer (6, 7) for each string, the outputs of the transducers being independent of each other. Signal processing means for each transducer output includes a loop of effects devices (20), such as reverberation, flanger, echo or delay devices, which can be switched in or out of circuit as desired by the musician. The outputs corresponding to the notes played on the respective strings can therefore be processed entirely independently of each other. The processed signals from the various transducers are then combined, as desired, into two stereo channels (29, 30). The signals in the stereo channels are amplified and further processed, if desired, by another set of effects devices (40). They can also be fed through respective bucket brigade delay devices (54) and through voltage-controlled amplifiers the gain of which can be varied to adjust the stereo balance and/or to cause panning of the stereo image. The panning may be cyclic, in accordance with a triangular or sinusoidal waveform. The routing of the signals, the connection of effects devices, the length of delay imparted to the signals, the control of the stereo balance and/or the control of the panning is determined by a microprocessor which is controlled by routines contained in an EPROM and by instructions entered into a RAM by the user.</p> |
