| 摘要 |
The invention describes an apparatus for software or hardware emulation of acoustic feedback effects. The invention comprises an analog to digital interface ( 200 ) for the input, whose output is summed ( 202 ) with a feedback of this digital signal passing through an amplifier model ( 204 ), a room acoustics model ( 206 ) and a string model ( 210 ). The summed signal ( 202 ) is converted from digital to analog ( 205 ) and can then be connected to a standard amplifier. The room acoustic model comprises a volume control ( 208 ) where the degree of feedback is controlled, while the string model contains a model ( 212 ) of which harmonics to feed back, and finally an algorithm ( 214 ) that decides which fundamental frequencies that the incoming digital signal contains.
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