Posted on 
Mar 02, 2004 08:44 pm Hey
I used to have one, I'll review it now for you and place a copy of this into the gearbag.
I used to do a lot of work on a laptop system running cubase. I bought an M-Audio Quattro because it had 4 ins and outs and ran on USB. In usage I found it to be rather crap. The USB 1.1 bandwith is very narrow, eg it can only allow a small amount of data to get to the computer each second - and as you can appreciate, 4 audio tracks at 44.1, 16bit is a fair chunk of data.
The card has both ASIO and WDM drivers (in WDM mode you can only access 2 I/O ports), both of which suffered from heavy dropout, even the 2 channel mode (were only 2 of the 4 inputs are used to save bandwidth) the card still exhibited the occasioanl "digital hiccup"). In the end I sold this card on eBay - glad to be rid of it. I replaced it with a PCMIA solution - that was good.
Verdict: M-Audio tech support (finally) said my laptop was incombatible - my laptop was a toshiba, how much more compatible did a laptop have to be? I did look else where.