ENCO TECH NOTE

DATE:     October 19, 1995

RE:       Using the Conex AS-101 Switcher to mix network and local
audio, eliminating the need for an additional mixing console.

GPO FILE*  TO USE CONEX AS-101 AS A "MIXER"


board1_pgm  S "^M,,0"    ; SELECT DAD AUDIO OVER NETWORK
board1_stop S "^M"       ; RELEASE DAD AUDIO
board1_sec  S "^M"       ; RELEASE NETWORK AUDIO
board1_ter  S "^M,,5"    ; SELECT NETWORK AUDIO OVER DAD

*in this sample file, switcher input 0 is DAD board 1 audio output
and switcher input 5 is network audio.  Board 1 is used to play all
local audio.  Commas represent a 0.1 second pause.

SYSTEM REQUIREMENTS:  The AS-201 serial interface and AS-101 switcher
must both be in Overlap mode (Toggle switch DOWN on the AS-201).  The
%LOCATION%.CFG file must have the following lines or similar:
COM2_INFO = "2400 N 8 1"
SWITCHER_OUT_IO=    2

Note that if your system uses COM3 or COM4, you will have to add an
IRQ statement to your config file.  Contact ENCO Technical Support
for more information.

IMPLEMENTATION:  The first element in the stopset must have a SEC
tone active.  The last element must have a TER tone active.  SEC and
TER tones must be disabled on all other spots.  All spots must SEGUE
to the same audio board.

RESULT:  The network and DAD audio will overlap until the SEC tone is
detected, then network audio is released.  When the TER tone is
detected on the last spot, network audio is mixed over local audio
until the STOP is detected, at which time DAD audio is released.