If you set the "advanced" button on the back of the Edirol to "off", then certain apps will play sound through he device.
For example, Rebirth works great.
The "system" sounds, like sound effects, do not play though...
I read fast the manual that I found from net: System sound playing (Sound Manager) is not supported.
It is quite normal that system sounds doesn't work with semi-professional or professional audio-interfaces.
I think there was some program to route system sounds to ASIO driver, I don't remember name.
It seems that UA-25 has two ASIO drivers ASIO1.0 and ASIO2.0.
ASIO1.0 is for advanced off and ASIO2.0 is for advanced on.
ASIO1.0 should work every application.
I afraid that UA-25 ASIO2.0 driver only works both directions (in and out) at max 24bit/48khz, like M-Audio Transit.
But from manual: "If you want to playback at 96 kHz, you must set the 96 kHz REC/PLAY switch to 96 kHz PLAY (playback)."
So I am interested in does it support 24bit/96khz at output only mode like M-Audio Transit?
I am interested in although I know that it is quite normal analog side of these devises has residual noise and frequency response comparable to somewhere 17bit/45khz quality (everything else is in noise floor) (what is not bad, it is better than analog side of some modern devices)
Remember you can use UA-25 as MIDI interface only and do not use audio side at all (don't put ASIO driver to Cubase ASIO folder).