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Speaker delay
The delay to set on a speaker, in ms and samples.
What it does
A delay speaker (delay tower, fill speaker at the back of a room) is closer to the audience than the main speakers: its sound arrives first, and the two blur. Delaying it by the right amount puts them back together.
- Two speakers: measure the distance from the main speaker to a listening spot, then from the delay speaker to the same spot. The delay is the difference divided by the speed of sound.
- Precedence margin: adding a few milliseconds makes the sound seem to come from the main speakers (the Haas effect). 5 to 15 ms is a common habit, not a rule: trust your ears.
- One distance: how long sound takes to travel it (to align a sub, a monitor, a microphone).
- The speed of sound depends on temperature (about 0.6 m/s per °C): measure on site if you can.
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