Atomos UltraSync ONE

Capabilities

The UltraSync ONE provides two capabilities to Pixelrush:

• Timecode — the device emits LTC; Pixelrush reads it from any audio interface input on the Pixelrush machine.
• Framerate — set manually on the connection. LTC carries no framerate metadata, so Pixelrush cannot infer it.

Set up LTC

Configure the UltraSync ONE for master LTC output, with a frame rate that matches your production. See the UltraSync ONE manual for the device-side menu steps.

The UltraSync ONE's LTC output uses a DIN 1.0/2.3 connector and ships with a DIN-to-BNC cable. To reach a 3.5 mm input on a typical audio interface, add a BNC-to-3.5 mm adapter or use a third-party DIN 1.0/2.3-to-3.5 mm cable.

1. Connect the LTC port to a line-level input on the audio interface connected to the Pixelrush machine.
2. Open Settings → Connections.
3. Select Add Connection and choose LTC Reader.
4. Fill in the form:
   • Connection Name — a short label, for example UltraSync LTC.
   • Audio Input — select the audio interface input carrying the LTC signal.
   • Framerate — select the framerate that matches your master timecode rate.
5. Select Add Connection. macOS may prompt for microphone access on first use — allow it. The status indicator changes to Connected once frames are arriving.

Verify timecode lock

On the Settings → Connections list, the live timecode for the UltraSync ONE connection appears beside its name and updates in real time when frames are arriving. If the value is frozen or blank, see the Troubleshooting guide.

Once the timecode is running, assign this connection as the Timecode Source when you start or edit a session.