Digital Broadcast Production Console
MIX MINUS
FIG 1 - MIX MINUS ABSTRACTION
Mix Minus is a system that allows
a comprehensive mix to be sent to
multiple listeners each receiving the
complete mix, minus their own input.
Fig 1 shows an abstraction example
of a mix minus system. Assume that
the sources surrounded by a blue box
represent people, either presenters or
field reporters. The other sources may
represent VT or server audio feeds.
These sources are fed to the input of eight
channels on a console. Each channel has
the option for its signal to be sent to the
console wide mix minus bus.
This mix minus bus can be routed back
out to any sources that may require
foldback, for example the presenters or
field reporters. Each source would be
fed the entire mix-minus bus signal, with
their own contribution to that mix removed,
creating an unique feed.
In Fig 1 the mix sent back to source 1
would consist of sources 2-8, source 2
would receive a mix of sources 1 and 3-8
and so on...
Whyremoveasourcesowninput
fromitsfoldbackmix?
Two reasons are presented here. The first
relates to field reporters, or presenters in
studios communicating via long distance
systems such as satellite links.
The reporter would need to hear a mix of
the show’s audio in order to hear cues and
communicate with the presenters. The
inherent delay in these systems means
that it may be a number of seconds before
the audio reaches the reporter.
It can be very difficult to speak while
hearing your own voice returned to you
with even a slight delay. By using a mix
minus feed to the reporter, their own
contribution to the audio is removed
before it is fed back to them eliminating
this problem.
The second reason is to eliminate
feedback. If a presenter’s foldback was
monitored on loudspeakers without
subtracting their own contribution, some
of their original signal may be picked up
by the microphone again, thus creating
a feedback loop. By using a mix minus
system to remove the presenter’s own
contribution, this feedback loop is broken.
Sendingsignalstothemixminus
bus
There is one mono mix minus bus, which is
a global bus that any path can contribute
to.
Mix
Minus
Bus
Input
from
source 1
Feed to
source 1
minus
Input
from
source 2
Input
from
source 3
Input
from
source 4
Input
from
source 6
Input
from
source 7
Input
from
source 8
Feed to
source 6
minus
Feed to
source 8
minus
Feed to
source 2
minus
Feed to
source 3
minus
Input
from
source 5
Содержание Artemis
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Страница 11: ...calrec com Putting Sound in the Picture ARTEMIS INTRODUCTION ...
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Страница 149: ...calrec com Putting Sound in the Picture ARTEMIS SHOWS MEMORIES AND PRESETS ...
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Страница 185: ...calrec com Putting Sound in the Picture ARTEMIS GLOSSARY OF TERMINOLOGY ...
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