Critical issue – AMC unusable with multiple Apollo interfaces (X and non-X)

Hello Sonarworks team,

I’m reaching out to report a blocking issue with the Apollo Monitor Correction (AMC) integration in SoundID Reference.

When I use my Apollo Twin X Gen 2 alone, everything works perfectly:

• The calibration profile loads via AMC

• Audio is routed correctly

• The Monitor Control in the UAD Console functions as expected

However, as soon as I turn on my Apollo 8 (non-X, rack unit), audio is completely cut off.

The Twin becomes the secondary interface, and SoundID appears to apply the AMC calibration to the Apollo 8 — which is not connected to my monitors.

As a result, the Twin X — my actual monitoring interface — receives no audio at all.

To get audio back, I have to:

• Power down both Apollo units

• Turn on only the Twin X

• Relaunch SoundID Reference and manually reapply the calibration profile

This behavior makes AMC unusable in setups involving multiple Apollo interfaces (X and non-X).

What’s clearly missing is the ability to:

➡️ Manually select which Apollo device the AMC profile is applied to.

In my setup (and I imagine many other professional studios):

• I use an Apollo 8 for I/O

• And an Apollo Twin X for monitoring and Monitor Control

• I expect AMC to work exclusively on the Twin X, without interference from the other unit

Could you please let me know:

• Is this behavior known?

• Do you plan to implement a device selection option?

• Is there an official workaround for this kind of multi-Apollo configuration?

Thank you in advance for your help — I truly value your tool, but this limitation currently makes the integration unusable in my studio.