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S

• On a sound desk, the solo button on each input channel silences all other inputs so that channel alone can be heard. Dangerous to use during a show, but can be useful for fault-finding or testing equipment.
• On a lighting desk, SOLO mode kills all other channels except the single dimmer you're working with. Again, can be useful for identifying a channel in a large rig, but can be dangerous during a show. Some desks allow you to assign flash buttons to SOLO mode which will turn off all channels except those loaded into that flash button or submaster. This can be used for a quick lightning effect (but it's a bit tacky). On Strand Lighting memory desks, the solo function is called REMAINDER DIM (or REM DIM).

SON ET LUMIERE
An audiovisual entertainment often based on an historical theme (and often produced in a historically relevant location). A voice narration is often used and lighting / special effects set the mood and portray certain events in time with the narration. Often used to refer to a performance with no performer where the meaning is communicated solely with technical effects.

SOUND TO LIGHT
An effect that has 3 or more lights that respond to different frequencies of the music.

SOURCE FOUR

• ETC spotlight that contains 4 buit in framing shutters to shape light beams, soft to hard edge focus. Includes pattern slot to hold accessories. Ideal to project various stock pattern designs or custom logos.
• Also known as S4. Range of lanterns manufacturer by ETC.

SPAN SET
A loop of nylon webbing wrapped around load bearing structures at the points to which it will be rigged.

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.

SPECTRUM
Wavelengths of electromagnetic radiation.

SPECULAR
A surface from which the reflection is predominantly directional. Specular surfaces are mirror-like or shiny, as opposed to diffuse.

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.