Multi-track Sound Recorders
Conventional multi-track sound recorders are being used increasingly in
the post-production phase of television, under the control of the VTR
timecode. During the year a l6-track machine was modified for time-code
control
and
electronic
editing
especially
for
the
Macbeth
opera
production.
PROJECTS IN PROGRESS
The Evaluation of Commercial Equipments
A number of sound recorders have been evaluated but unfortunately those
of British origin have been found unsuitable where high recording
standards and reliability are essential. For these reasons
well-established designs produced by continental manufacturers are being
used until essential improvements are incorporated in British machines.
Liaison with British manufacturers continues.
New Shot Change Detectors
An essential feature of recording shot-by-shot colour
that shot-changes should be accurately detected so that
correction can be applied throughout each and every shot.
shot-change detectors are being redesigned so that the
can work more effectively and economically.
corrections is
proper colour
The existing
overall system
Audio Tape Machine Synchronisers
A major, audio tape editing suite is in operation at Television Centre
and there are plans to build a second one. In addition new facilities
are required in the regional centres for the post-production editing of
audio
tape
and
perforated
film.
All
these
areas
will
require
synchronisers which can lock slave machines to a master videotape
recorder. A range of sub-units is being designed so that combinations
of them can satisfy the simplest or the most complex requirements.
Audio Tape Reclamation
A robust tape deck manufactured in the United States has been fitted
with special heads and tape mechanics so that the tape is driven at
250cm per second, about seven times its normal speed. By using very
high frequencies the performance of the tape at normal wavelengths is
inspected so that below-standard tape can be cut out and all joints
remade. The design uses a high degree of automation to minimise the
need for operator intervention.
Audio Test Tape Manufacture
The current batch of reference tapes is rapidly being exhausted and a
fresh supply must be made available in 1978. To meet this demand, two
new tape decks have been purchased to help in the accurate determibation
of test tape frequency response and in the production of master
reference tapes which can be copied using the automatic equipment
designed in 1977. A start has been made on equipping the first tape
deck which will be used for work on t" and i" tape as well as l6mm film.
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