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D-70 / Apr 2000
CPU & DSP
connected to the interface can control any of the console functions. Note that
the console operator also has control of the console functions even when the
remote serial interface is enabled.; the console will respond to any command
regardless of where it comes from. When the interface is disabled, the
console will not respond to any commands sent to the remote serial interface;
it will respond only to the console switches and faders.
DSP
The DSP is the main audio mixing processor in the D-70 Digital Audio
Console. It functions solely as a mix engine, combining all of the console
audio signals as directed by the console faders and switches to produce the
various output mixes for PROGRAM, AUDITION, AUXILIARY1 and 2,
CUE, and TELEPHONE.
The DSP operates at a factory set sample rate, normally 48KHz, which
dictates the output sample rate of the D-70 console digital outputs. Consult
Audioarts Tech Support if you wish to use a different output sample rate.
Since all of the console digital inputs are equipped with sample rate
converters, the console inputs will accept any sample rate between the range
of 1/2 to twice the output sample rate, and will actually track a variable
sample rate as long as it remains within this range. This feature allows you
to interface different types of digital sources into the console, each with
different sample rates.
D-70 Serial Interface
Using the Serial Interface
The D-70 Serial Interface is designed to support serial communications
under the RS-422/485 and -232 protocols. The proper serial interface
protocol must be selected (via jumpers on the PR-70 PCB) or else serial
communications will not function correctly. No serial interface connections
are required for normal, stand alone operation of the D-70 console; in fact the
console will work normally with an improper connection to the serial
interface. The function of the serial interface is to enable remote operation
of the D-70 console functions; local operation of the console switches and
faders will always override any remote commands that may have been sent
via the serial interface. In addition, the button on the CRD-70 module can be
used to disable any serial communications with the D-70 console. Toggling
the switch “ON” and “OFF” alternately enables and disables the serial
interface port on the D-70 console. Pushbutton LOC/REM switch lights
when the serial interface is active. Remember, the D-70 console can always
be controlled by its faders and switches regardless of the status of the serial
interface.
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