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SSOUND TO LIGHT
A facility which can link the effects panel on a lighting board to an audio
input which detects treble, mid and bass beats, and can flash lights or
trigger effects in time to those beats. First used when electronics allowed
it cheaply in the late 1960's/
SOURCE FOUR
Also known as S4. Range of lanterns manufacturer by ETC.
SPECIAL
A lantern within the lighting rig which is required for a specific moment or
effect within the performance, and is not part of the general cover
lighting.
SPIDER
Adaptor to connect many lanterns to one multicore cable. Consists of
multipin connector (typically Socapex or Lectriflex), short length of cable,
then a number of sockets related to the number of circuits in the cable.
SPIGOT
An adaptor screwed onto the hanging bolt of an instrument to enable it to be
used on an upright stand.
SPILL
Unwanted light onstage.
SPILL RINGS
Concentric rings attached to the front of a beamlight (eg Strand Pageant) to
contain spill.
SPOT
To reduce the beam size of a fresnel or pc lantern by moving the lamp
further from the lens. (e.g. "Could you spot that down a touch, please?").
SPOT SEAT
Chair for suspending followspot operator above a stage / auditorium.
Normally rigged on a truss system. The operator gets to the seat up a wire
rope ladder, and is strapped into the seat. He or she will normally wear a
harness when getting to the chair for extra safety. The seat itself is an
adapted car "bucket" seat.
SPOTLIGHT
General term for any lantern with a lens system.
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