Patent ID: 6914181
Filing Date: 2005-07-05
Classification: G10H

Abstract:
1. A digital interface apparatus provided for use in an analog musical instrument capable of generating an analog audio signal, and designed for interfacing with an external digital audio apparatus, the digital interface apparatus comprising: an input/output interface for converting the analog audio signal generated by the analog musical instrument into a digital audio signal, the input/output interface having an input terminal and an output terminal for transmitting the digital audio signal to the external digital audio apparatus through the output terminal and for receiving a digital audio signal from the external digital audio apparatus through the input terminal; a signal processor for processing the digital audio signal which is either converted from the analog audio signal or received from the input terminal; a main controller for controlling operation of the signal processor according to instructions; an operating member manually operative to provide the instructions to the main controller; and a bus controller for controlling a bus connecting between the main controller and one or more of the external digital audio apparatus having a CPU through the input/output interface for bi-directionally transferring audio data including the digital audio signal and a digital control signal effective to control processing of the digital audio signal, the bus controller being operative in a stream mode for transferring the digital audio signal in a stream of packets at a constant rate, and being operative in a burst mode for transferring the digital control signal in a burst form.