How to change the Primary Device

[PeterSt]

From http://www.audioasylum.com/forums/pcaudio/messages/2/21528.html :

Engine #2 also works with XP and gets around the 64MB limit, but only works with Primary Sound Driver. My USB DAC is not my Primary Sound Driver and so I can't use Engine #2. (Anyone know how I can change my sound card priorities to make my USB DAC the Primary Sound Driver?)

Go to the tab as shown below and select your USB driver in there. BUT :
What you see there ("No Playback Devices") is probably what you see too. That is, if you shut everything off because of Foobar et al, that what you'll get. I did that too, but with me this is about bit perfect MME (from RME) drivers, which just don't need to show there.
The best option for you would be to enable your USB device in Device Manager, hence revert what you did to shut that off (if you did, that is). Write down what you do to revert it, so you can go back if you don't like XX afteral. I know, to get all (not !!) working in there as should is a hell by itself.

Even if I could make this engine #2 work, I may not have enough ram to play my whole album single wav files... idk [i have 512k of ram... i can have up to 2 gigs of ram]

This would be true. But be careful in the mean time :
Engine#2 just will allow you to load the combined tracks, but it may take ages. There will be incurred for (intensive) swapping, and with a CD of 700MB with maybe 300MB free RAM it may take 15 minutes (depending on the situation you might get an Out of Memory error). So really nothing to go for. Better add this RAM.
Besides all, this disk I/O will influence the sound for Engine#2 (and #1 ... not #3).

HTH

[PeterSt]

Additionally, I found this : http://www.bd-design.nl/forum/board_entry.php?id=11592&page=0&category=all&order=last_answer&descasc=DESC#p11741

And this as a follow up : http://forum.bd-design.nl/board_entry.php?id=11766#p11772

might you need the other way around.
(and might you have a spare evening to read it )

[SeVeReD]

K figured out how to make my usb dac the Primary Device

I had to reverse what I did for foobar to get around kmixer:
1. Open the Windows Control Panel
2. Open Sounds And Audio Devices
3. Select the Hardware Tab
4. Select your sound card in the list
5. Click Properties Button
6. Select Properties Tab on the Sound Card Properties Panel
7. Click on the Mixer + sign
8. Select your sound card on the list
9. Click Properties button
10. Click option box 'Do Not Use Mixer Features On This Device'
11. Click Apply, and then OK.
12. Re-boot
13. Windows Mixer will no longer use the device.

But... now that I'm not getting around kmixer this way, how do I get kmixer out of the "mix" while running Eng 2. (" Needs proper tweaking OS of settings, in order for KMIxer does not interfere (resamples)"). Anyway... until I get more memory I'll have to rerip what I want to hear into smaller song wav files to play... so I'll prolly go back to eng 1 cause I generally find 16/44 straight through sounding the best... no upsampling or the like needed.  For foobar I use asio2k which only passes 16/44 data.  My Stello 100 USBDAC has upconverting ... but i've never liked it, so i stay on normal.  I'll try the eng 2 "doubling" for fun and see anyway.