This is a driver for the guitar amp, cab, and effects modeller
PODxt Pro by Line6 (and similar devices), supporting the
following features:
* Reading/writing individual parameters
* Reading/writing complete channel, effects setup, and amp
setup data
* Channel switching
* Virtual MIDI interface
* Tuner access
* Playback/capture/mixer device for any ALSA-compatible PCM
audio application
* Signal routing (record clean/processed guitar signal,
re-amping)

Preliminary support for the Variax Workbench and TonePort
devices is included.

source code:

drivers/staging/line6/