UAD Plug-Ins

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Noise Burst When Changing Sample Rate With Apollo Twin MkII

We’ve recognized an issue in the latest versions of UAD software that affects all Apollo Twin MkII users. When running UAD v9.10.0 or v9.10.1, changing the sample rate on an Apollo Twin MkII causes a short noise burst from the Line 3-4 outputs.

This burst happens regardless of the ALT Monitoring setting, and unfortunately cannot be muted. Note that this issue does not affect any other outputs on Apollo Twin MkII and does not affect any other Apollo or Arrow models (including 1st-gen Apollo Twin and Apollo Twin USB interfaces).

If you use an Apollo Twin MkII and are running the latest version of UAD software, this issue is resolved by downloading and installing a firmware update below for your particular model.

Important Note: This firmware update is only required if using UAD v9.10.0 or v9.10.1. If you’re using UAD v9.9 or earlier, you are not affected by this issue and no firmware update is required.

Apollo Twin MkII SOLO Firmware-Twin-MkII-SOLO-UAD23185.bin
Apollo Twin MkII DUO Firmware-Twin-MkII-DUO-UAD23185.bin
Apollo Twin MkII QUAD Firmware-Twin-MkII-QUAD-UAD23185.bin

To update your Apollo Twin MkII firmware, follow these instructions:

  1. Download the firmware file for your model by clicking the link above.
  2. Open the UAD Meter & Control Panel application.
  3. Drag and drop the downloaded firmware file onto the UAD Meter window.
    The firmware update dialog appears.
  4. Follow the on screen instructions. Be sure to power cycle the device when prompted.


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