5.1 external usb audio card stutter - Raspberry Pi Forums
Audio Injector Octo multichannel sound for the Raspberry Pi by Flatmax Studios — Kickstarter
iXium® USB External Soundcard Box 5.1 Surround Sound Optical In Out AES/EBU IEC60958 S/PDIF 3.5mm Jack Analogue for PC Laptop Netbook Computer: Amazon.co.uk: Computers & Accessories
Raspberry Pi Expansion Board
ASUS Xonar SE 5.1 PCI-E gaming sound card with 192kHz/24-bit Hi-Res Audio | OcUK