As Karsten said, these controllers use a different driver.
But in theory, this shouldn't have much of a difference regarding latency.
There have been fixes recently. Try updating the kernel.
> 16: 18305 0 0 0 IO-APIC-fasteoi mmc0, ehci_hcd:usb1, mei
Okay, I can guess which one the audio device is connected to ...
> 0d:00.3 FireWire (IEEE 1394): Ricoh Co Ltd FireWire Host Controller (rev 04)
The Ricoh controller doesn't work with MSI. If you ever want to use it,
you must update the kernel.
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