Usng more than one audio playback device

I use Vista X64 Business and want to route my audio to BOTH the Digital
output AND my analogue output.

How can I do this? I currently have to set each one independently as default
and switch between them.

 

You need to identify your exact audio hardware and then see
if you can find some documentation on the vendor's website
that might have relative information. Each individual
hardware vendor would have their own unique procedures.

 

It's a soundmax DTS soundcard.

I can't find any information from the vendour's website.

 

I would guess you're going to have to do a little research
and looking at the software supporting your sound card. My
Asus on-board RealTek sound chip has an option in the
'RealTek Sound Manager' to have both Analog and Digital
output at the same time. However, I have no idea what the
capabilities of your hardware are.