usb/firewire optical and 5.1+ output sound interfaces
Terratec Aurion 5.1 and 7.1 USB devices (maybe PC only?)
SIIG USB SoundWave Optical 5.1 (maybe PC only?)
Zalman USB ZM-RSSC Optical + Analogue 5.1 output. (maybe PC only?)
Hercules DJ Console - USB, Mac and PC, control surface, Optical + Analogue 5.1 output.
M-Audio Sonica Theater USB 7.1 Optical Output - Mac + PC? BUT: “OS 10.3 required for Dolby Digital and DTS pass-through using Apple DVD Player”
Finally….
ESI Gigaport AG and Gigaport DG - USB 8ch analog + optical (AG), and ADAT output (DG), Mac + PC, Asio 2.0 compatible.
—-> these look good!!! (although on further investigation, they’re quite old).
They may be the same as the Maya EX5 and EX7.
By the way, Frank Barknecht seems to suggest the Gigaport works fine on Linux with Pd. See here and here.