RE: Windows 7 and Terratec DMX 6 Fire 24/96 I've been very happy with my DMX on XP and shifting to W7 was a leap of faith. My PC is fairly old (Intel 875 PBZ mobo, P4 Northwood 3.4) and contains all my music library on 2 HDD's, so I took the plunge with a fair amount of anxiety.
I can confirm that the Vista driver v5.53.3.144 from
http://ftp.terratec.de/Audio/DMX6fire2496/Update/ works on W7.
I'm not using Windows Media Player on W7 but MediaMonkey v3.2, with the Asio output dll v0.67 SSE2. On the control panel of the DMX6 24/96, Asio/Gsif is activated in 24 bit (standard buffer). Other settings: Digital Out= Mix, Buffer 10 msec.
Sound settings in W7: after a lot of struggle (clicks, pops, cuts, white noise, more micro clicks, no sound, etc) the settings below work fine for me (although some fine-tuning is likely to further enhance the sound):
(1) Playback Devices in W7
a) Speakers>DMX6 Fire 24/96= Default Device
Properties>Advanced>Default Shared Mode= 24 bit-48K
Exclusive Mode: 'Allow Applications...' & 'Give Exclusive...' are on.
b) Spdif Interface>Properties> Supported Formats= All boxes checked. Default Shared Mode= 2ch, 16bit-44.1
(2) Recording Devices
Spdif Interface= DMX 6Fire 24/96= Default Device
Just testing with my PC 2.1 speakers (Altec FX 6021) the overall sound quality is clearly above XP: expanded soundfield, space & depth, details, warmer nuances. Using the DMX front panel Spdif output to an external DAC for listening to the main audio system brings a even fuller envelope. The DMX6 still offers a more than decent performance on W7 and is a good choice on a secondary PC so I won't discard it.