SoundBlasterX G6
The SoundBlasterX G6 is a Digital-to-Analog Converter (DAC) marketed for gaming audio. Creative Labs themselves don't support Linux. DACs in generally are supported by the Kernel and projects like soundblaster-x-g6-cli reverse engineered many of its features.
Installing
The following commands can be used to identify the device:
# dmesg
usb 3-8: Product: Sound BlasterX G6 usb 3-8: Manufacturer: Creative Technology Ltd
$ lsusb
Bus 003 Device 011: ID 041e:3256 Creative Technology, Ltd Sound BlasterX G6
To allow regular users access to the device add a rule:
/etc/udev/rules.d/50-soundblaster-x-g6.rules
SUBSYSTEM=="usb", ATTRS{idVendor}=="041e", ATTRS{idProduct}=="3256", TAG+="uaccess"
The package linuxblaster-controlAUR integrates one.
Troubleshooting
Microphone muted
Unmute the channels in ALSA: External Mic. You may also want to mute all the others to avoid cross-talk or hearing yourself. linuxblaster-controlAUR comes with a script that automates this as the workaround has to be applied on every restart.