I chose the Quattro over the Echo Mia + MidiMan USB 1x1 interface because I wanted an all-in-one unit, and I liked the idea of a completely USB audio interface.
I purchased this item hoping that I would be one of the lucky folks that got it to work correctly. I did get the impression that some of the previous bad reviews were due to lack of technical expertise, so I didn't think I would have a problem.
I'm on Win2k, SP2, and I tried driver versions 1.22 and 1.26.
The quattro seems to be a great product, and works SOMEWHAT. The drivers, however, are pure trash. Often times, my computer would blue-screen in the quattro's context, and other times it would simply stop working and the drivers would simply "shut down" and stop working, requiring a reboot.
Midiman's tech support is worthless - seriously. It might as well not exist.
The moral of this story is that whether you get this to work or not, it's probably not worth the gamble. Comparing this unit's reviews to other products, it's against the odds that it's going to work. Even if it does work, I can't say it would be a reliable device. It's possible that with later versions of the drivers it will work better, but judging from the difference between 1.22 and 1.26, it's not likely.
Conclusion: Choose a different device. The idea is great, it sounds great, but it's unreliable.
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