What I think could be possible is using (writing a
driver for) the
scratchamp with OSS or ALSA drivers, as they seem to be USB soundcards
by creative. Those will have standard chipsets.
But that wasn't the question I guess...
If you are interested in trying to get it working with alsa then you need
the usb-audio driver. Installing it and inserting the module will tell
you pretty quickly how easy it will be to get working. The alsa usb-audio
driver is significantly more advanced than the oss version which it was
based on.
If it doesn't work for you then sending in the info from lsusb to the
alsa-devel list will help a lot.
Have a look at the generic instructions for usb in the alsa-docs.
http://www.alsa-project.org/alsa-doc/
Patrick.
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