Lip‑sync lag is the silent killer that turns a slick broadcast into a glitchy nightmare. Every frame that’s off‑beat throws off the audience’s perception and makes your mix feel half‑off. When you’re pulling audio from an external recorder and video from a camera, the moment the mixer drops the sync lock is when chaos erupts.

**Pro tip:** Use the *sync‑lock* feature on your mixer’s *audio‑input* bus and tie the video source to the *video‑sync* input. Route the camera’s sync signal to the mixer’s *HDMI/SDI sync in* port, then pull the same clock to the audio line‑in. This keeps the audio clock locked to the video clock, eliminating that dreaded drift. Don’t forget to set the same *bitrate* and *sample rate* on both the audio and video streams—matching them (e.g., 48 kHz/24‑bit for audio, 1080p/60 fps for video) ensures the mixer’s internal DSP stays in sync. Finally, enable *auto‑sync‑lock* in the mixer’s routing menu to let it auto‑tune latency every time you hit record.

**Resource of the Day**

[YouTube search: “sync‑lock audio video mixer tutorial”](https://www.youtube.com/results?search_query=sync-lock+audio+video+mixer+tutorial)