plutek wrote: > 00:1a.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host Controller #2 (rev 04) > 00:1d.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host Controller #1 (rev 04) 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 > 23: 60179021 0 0 0 IO-APIC-fasteoi ehci_hcd:usb2 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) > 41: 573 0 0 0 PCI-MSI-edge firewire_ohci The Ricoh controller doesn't work with MSI. If you ever want to use it, you must update the kernel. Regards, Clemens _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user