Hi Rutger Noot! On 2013.12.20 at 08:23:55 +0100, Rutger Noot wrote next: > I didn't make any progress on this, except for finding out on the web > that the TEAC has some firmware quirks (supposed to be handled by recent > kernels). It appears that the teac driver is indispensable in windows to > get the device running usb 2.0. Is there a way to find out (under linux) > if the audio device is configured as usb 2.0 ? The usb subsystem also > detects a HID device (which is usb 1.0 ??). If the audio is treated as > usb 1, this would explain a lot. Run "lsusb -v", find your device in output - bcdUSB parameter is version. E.g. Bus 002 Device 005: ID 20b1:0002 XMOS Ltd Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 239 Miscellaneous Device bDeviceSubClass 2 ? bDeviceProtocol 1 Interface Association bMaxPacketSize0 64 idVendor 0x20b1 XMOS Ltd idProduct 0x0002 bcdDevice 3.30 iManufacturer 1 XMOS iProduct 2 XMOS USB Audio 2.0 ... (Ignore iProduct here - that's just device name, but as bcdUSB shows it's working in 2.0 mode) By the way, USB 1.1 has quite enough bandwith for 24 bit / 96 kHz output. I did that on my older M-Audio Audiophile USB. It's just that you can't go higher than that, or can't record + playback at the same time. USB 2.0 is only strictly required if you need 24/192 or more than 2 channels for 24/96 or more than 4 channels for 24/48. -- Vladimir ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
