I think you should skip USB, what that FTDI does is install a fake driver so your OS and programs believes it is a serial port - but it caused some minor problems in my system...

HD621, G98DH, G68ADV, Bc Acoustiqe ACT A3, 5200C DSP33, NuForce Reference 9 monoblocks, 2x SB3's, Velodyne DD-15 & DD-12 Subwoofers and a Meridian sub.