Patent ID: 6218971
Filing Date: 2001-04-17
Classification: H04H

Abstract:
A multichannel digital mixer unit for use either singly or in cascade connection with another mixer unit of identical make, the mixer unit comprising:(a) a plurality of analog inputs for inputting as many analog signals to be processed;(b) at least one digital input for inputting at least one digital output signal from a second mixer unit of identical make in the case where the instant mixer unit is connected in cascade with the second mixer unit;(c) a plurality of analog-to-digital converters connected one to each analog input for digitizing the input analog signals;(d) a digital signal processor connected to the digital input and the analog-to-digital converters for producing a plurality of digital output signals by mixing the digital input signal, if any, from the second mixer unit and the outputs from the analog-to-digital converters;(e) a plurality of digital-to-analog converters connected to the digital signal processor for converting the digital output signals. therefrom into analog signals;(f) a plurality of analog outputs connected one to each digital-to-analog converter for putting out the analog output signals therefrom;(g) at least one digital output connected to the digital signal processor for putting out at least one of the digital output signals therefrom for application to the digital input of the second mixer unit in the case where the instant mixer unit is connected in cascade with the second mixer unit;(h) operating means for manually inputting instructions indicative of instructions to be performed by the digital signal processor on the signals input thereto;(i) control means connected between the operating means and the digital signal processor for causing the latter to process the input signals according to the instructions from the operating means; and(j) control input/output means for connecting the control means to like control means of the second mixer unit in the case where the instant mixer unit is connected in cascade with the second mixer unit, in order to permit control of both mixer units by either mixer unit.