theres a 5v pci version (one notch in card) and a 3.3v pci revision (two notches)
http://www.soundonsound.com/sos/jun01/articles/echomia.htmhttps://web.archive.org/web/20111225022348/http://www.soundonsound.com/sos/jun01/articles/echomia.htmos support for nt4, windows 95, 98, ME, 2000, XP, XP64, Vista, Mac OS 8.6, 9.x, 10.2+
if you need powermac g5 compatibility look for the 2nd notch in the pci card, the ones with only
one notch will only work in g4s + windows pcs
keep in mind there is a MIA that doesnt feature Midi.. it was simply called the ECHO MIA
a user remarked to me his experience using the card in windows 7:
Hi Chris,
I actually sold this as well a while ago and forgot to delisted it. It did work in Windows 7 using the vista drivers with no issues. Was pretty impressed with the fidelity of the TRS outs in case you ever find another one up for grabs it's worth the $50 if you need something in that price range.
Cheers,
Rob