On Wed, March 6, 2013 11:46 am, Gabbe Nord wrote: clear up a few things here for my own sake, sorry for being slow: * You are referring to an "I/O" USB card that connects to PCI-E as a solution, right? Yes. See my comments below as the two are related :) soundcard plugged in to one port, and my USB-hub with everything else on on connected to the motherboard directly. Can I somehow find out what's connected to what inside the computer, and how do I modify my IRQ-files to using lsusb -t do that for me? You posted your cat /proc/interrupts a few days ago. In there I could only see two USB ports at all. USB1 and USB2. Not only that, but both USB ports use the same IRQ. What this means is that, even though there are some more physical USB ports on your machine, they are only there because the MB has an internal USB hub (or two). The only way to get beyond that I can see is to add a new USB interface on a fresh IRQ. I don't know what kind of slots your MB has (PCI or PCIe or both) but USB cards should be available for either... probably cheaper than a new audio card. Make sure it is USB2.0 or USB3.0 (+2 +1.1) and not just 1.1 ... I normally just use dmesg to find out what the new device is: [363472.113041] usb 1-7: new high-speed USB device number 3 using ehci-pci That says the usb stick I inserted is in USB1 (a USB2.0 port) and that is device 3 (out of 4 I am guessing) lsusb -t gives this before I add the device: $ lsusb -t /: Bus 05.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M /: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M /: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/8p, 480M |__ Port 8: Dev 2, If 0, Class=stor., Driver=usb-storage, 480M (Dev 2 is my system disk right now) and this after: $ lsusb -t /: Bus 05.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M /: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M /: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/8p, 480M |__ Port 7: Dev 5, If 0, Class=stor., Driver=usb-storage, 480M |__ Port 8: Dev 2, If 0, Class=stor., Driver=usb-storage, 480M Hmm, now it is device 5, so I guess it is not out of 4. I don't know what the port is though. My cat /proc/interrupts looks like this: 16: 1881681 IO-APIC-fasteoi uhci_hcd:usb2, uhci_hcd:usb5, nouveau 17: 1985740 IO-APIC-fasteoi eth0 18: 66775 IO-APIC-fasteoi ata_piix, uhci_hcd:usb4 19: 0 IO-APIC-fasteoi uhci_hcd:usb3 20: 210124 IO-APIC-fasteoi snd_ens1370 22: 25879534 IO-APIC-fasteoi snd_ice1712 23: 1281786 IO-APIC-fasteoi ehci_hcd:usb1 The interesting thing to note is that when I told the BIOS _NOT_ to give my USB devices IRQs The kernel does so instead and USB1 (as you can see) now has it's own IRQ, it used to share 16... Not so good as it is the only high speed USB device I have. anyone with something) using and vocals (both singing and rap vocals). Is there any reason for me to run quality, even by a little, so if there's any reason not to go 16bit I probably won't. If you already have a 24bit device, get it working. There are not very many PCIe sound cards around and those that are seem to be (overly) pricey. Even a PCI 24 bit card will probably cost you more than a new USB card. I think 24bit is worth having, I just figured you were running USB1.1 at 16 bits right now. I was mistaken. -- Len Ovens www.OvenWerks.net