On Wed, April 13, 2016 3:01 am, Clemens Ladisch wrote:
Simon Wood wrote:
I have been struggling for the past few days to get a Tascam US-122L (USB sound-card/midi interface) working, despite reading numerous forum postings I have only been able to get the midi portion working.
Does it show up with "aplay -l"?
The card shows up under '/proc/asound/cards', but only as Midi. See attached for full listing.
I note that the USB descriptor seems to be corrupt. It declares 2 interfaces, but then describes 3 separate with the same interface number for the last 2.
The descriptors describe two alternate settings for the same interface. This is a feature, which is required for audio devices.
iManufacturer 1 (error) <------ Here be Errors! iProduct 2 (error) iSerial 3 (error)
It's possible that lsusb does not have the permissions needed to send the messages to ask for the strings. Try running it as root.
Was running as root (on Xubuntu, 2 different machines, different installs).
I note that sometimes this is OK, ie when I do '# echo 0 > /sys/bus/usb/devices/1-2/bConfigurationValue', but then I have no interfaces at all (no midi, no listing).
Can anyone confirm they have a US-122L working on a new kernel. Is the USB descriptor the same as what I'm seeing, perhaps hardware changed at some point. Cheers, Simon