Sync & reference audio · Working
2-pop
Also called: two pop
ELI5
A tiny beep used to check that sound and picture line up correctly.
Used in conversation
“Leave the 2-pop in so we can check sync before delivery.”
Definition
A one-frame audio tone placed two seconds before programme start or another sync point.
Here “2-pop” means: A one-frame audio tone placed two seconds before programme start or another sync point. Other meanings are stored as separate sense entries and must be chosen explicitly.
Pitch context
You may encounter “2-pop” in sound, music & voice conversations or materials.
Why it matters: Explains dialogue, effects, atmosphere, music, voice and the technical work of making them intelligible.
Connected terms
- Sync popThe search label “2-pop” can route to both entries.
Sources & evidence · 4
Supporting source families. This entry is an editorial synthesis rather than a quotation from one canonical glossary.
- European Broadcasting Union — EBU R 128 Loudness Normalisation and Permitted Maximum Level of Audio SignalsSupporting source family · primary · checked 2026-08-14
- Dolby — Dolby Atmos Content CreationSupporting source family · primary · checked 2026-08-14
- World Wide Web Consortium — Making Audio and Video Media AccessibleSupporting source family · primary · checked 2026-08-14
- Netflix — Partner Help Center Delivery SpecificationsSupporting source family · primary · checked 2026-08-14