crystal User Manual
Version: 6.6.0/2
102/459
7. Operation
7.15
Conference Bussing (N-1/Mix Minus)
The conference system can be used to generate N-1/mix minus feeds for pre-configured sources.
Each source added to the conference system receives an automatically switched mix minus feed. When their
source fader is open (on-air), they will hear PGM 1 minus themselves. When their source fader is closed (off-
air), they will hear the conference bus minus themselves - this allows members of the conference to hear each
other while they are off-air.
Let’s assume you wish to use the conference system for 3 sources:
MIC 1
(the DJ),
MIC 2
(a studio guest) and
TEL 1
(a phone-in guest).
Setting Up the Monitoring
The first step is to set up the monitoring so that the mix minus feed for each source is returned to the correct
destination. For our example, we will assume:
·
The DJ is listening on his/her headphones (controlled via HP DJ).
·
The studio guest is also listening on his/her headphones (controlled via HP GUEST).
·
The phone-in guest is receiving the TEL 1 mix minus return (there are no separate level controls for this
output).
If the system is set to the DEFAULT audio, then:
·
Connect the DJ headphones to HEADPHONE 1 (Compact Engine rear panel).
·
Connect the guest headphones to HEADPHONE 2 (Compact Engine rear panel).
·
Connect the phone-in guest's return to the TEL 1 n-1 return (i.e. Compact Engine rear panel, LINE OUT
connector, output 5).
Working with the Conference System
Once the monitoring returns are in place, then the conference system operates as follows:
1
.
Turn on the
CONF
bus assign buttons for all sources within the conference – in our example, on the
MIC
1
,
MIC 2
and
TEL 1
fader strips.
This routes each source onto the conference bus; the
CONF
buttons will turn red, yellow (flashing) or white
depending on the status of the faders:
For the conference system to work you must have at least two sources with
CONF
enabled.
Each source within the conference system now receives an automatically switched mix minus feed; what they
hear will depend on the status of the three source faders.
2
.
Close all three source faders.
The
CONF
buttons become red and all sources will hear the conference bus minus themselves. In other words,
they can hear each other, but not themselves, and chat off-air.
