I like listening to music, but the one thing I can't get with the mobile devices (players, smartphones, notebooks) is the volume and clarity I get from my desktop pc audio card. It's nothing special, the cheapest PCI-E x1 Sound Blaster card, but somehow it sounds a lot better. I have tried listening to external audio cards and their sound is comparable, but they are a lot more expensive, to the point that I can't really think of it as a great value. So I'd like to try and find a way to make internal PCI-E audio cards mobile.
Does there exist a common method to mobilize internal PCI-E devices? Perhaps some controller with only the required interfaces and power cables? If not, what does it take to turn a PCI-E audio card into USB-powered mobile version? Again, I'm looking for reasonably prices solutions, but if there are only the expensive ways, I'd still like to know about them.