Line 6 POD X3/HD300/400/500 USB support

modulename: snd-usb-podhd.ko

configname: CONFIG_SND_USB_PODHD

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>USB sound devices
└─>Line 6 POD X3/HD300/400/500 USB support
In linux kernel since version 3.10 (release Date: 2013-06-30)  
This is a driver for POD X3, HD300, 400 and 500 devices.

source code: