As I have very recently purchased a Terratec EWX 24/96 to replace my "good old" SB Live I believe I might have something to add to this discussion.
The difference was enormous. Here is a few things that were immediately apparent when I switched sound cards:
1. The sound has much better definition and clarity. It's like a huge wall of pure noise was removed from the sound. The noise involved with Live isn't like an analog hiss; more like a quantization error. Details are much more audible, my jaw dropped as I noticed that in one song, there was a very subtle hi-hat beating around. I had never noticed that hi-hat before. Also the positioning (sense of location) of single instruments is much better, the stereo sound field now actually has some palpativity in it. Also it seems that with Live the music would have been equalized really weirdly.
I believe strongly that this is mostly a resampling issue. It's widely known that poor resampling can destroy music completely. It also causes that Live's frequency response curve is far from straight line. More like a complex 4th-degree equation. The "weird equalization" -issue could be a straight consequence of this. Based on this, I wouldn't recommend a resampling AC97 sound card for anything, even to be used as a frisbee. They are simply
evil.
2. Stereo separation is much better. More precisely, there actually exists some stereo sound field now. The instruments have a firm location in the sound field. With live they seemed to be travelling around randomly.
This leads me to the assumption that my Live's output jack must have been broken, minijacks aren't exactly very reliable. Even Live can't suck that bad at stereo imaging.
So, should a newbie be recommended to buy a Terratec or an Audiophile? The difference of these cards is a slightly different model of Envy24 DSP chip, or precisely, the chip Audiophile is using is "better specified." The audible difference is even more subtle. I don't think very many people are physically capable of hearing the difference between these two cards. Not to mention the external equipmentry required.
On the other hand, difference between a SoundBlaster and any real audio card is huge and surely noticable with even very modest equipment. From a regular user point of view, any real audio card represents a quantum leap in audio quality compared to SoundBlasters, even the "shitty" Terratec. In my country Audiophile had a price tag of 340 €, whereas Terratec had 190 €. I won't shock you with the price tag of Echo Mia. Geez, how can I live with the fact that I have a crappy Terratec instead of the Almighty Audiophile? I must cry myself to sleep every night. Well, in fact I seem to be enjoying listening to music pretty damn much. I'm currently re-listening my entire collection since the songs sound so much different than before.
Buying a bit more expensive quality product also pays off in nice details. Here are few:
* No lousy minijacks here. Golden RCA connectors for analog I/O.
* Abundant and actually working analog & digital I/O in general. Sure, EWX is only a stereo card, but one can easily route i.e. DVD audio directly to an external Dolby Digital receiver via SPDIF. I trust standalones more anyway.
* The package had RCA cable, optical cable, SPDIF cable and a CD-Audio cable. I can't even remember when I got any extras bundled with a sound card.
* Terratec's core driver takes about 200 kilobytes of space. No more 30 MB LiveWares.
* Terratec's control panel application is much better than Live's. Every channel has 0-latency VU meter. Buffer sizes are customizable. Sampling rate can be selected, etc...
* I can actually create music with this card. I can use my MIDI keyboard + Propellerheads Reason in ASIO mode with 7ms latency in Win2k. Latencies <10ms are genreally agreed to be adequate for realtime playing.
* I can tick "Bit Depth: 24" at Cakewalk, Reason, MAD plugin and so forth.
I'm sure you get the idea

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