do not use this firmware it causes lots of bug impossible to live 9 launches with vsti osx 10.10.1
thank you good access to let the driver 5.1.0 on your site 
5.1.1.0 firmware problemes
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mclaulau -
don't you think "do not use the 5.1.1.0 firmware" sounds a bit dramatic and might be confusing for others? how about "i have problems with 5.1.1.0 and Live 9" for instance? we've tested this release against live 9 and we didn't find anything unusual. if we would have found anything that basic, we would have fixed it before releasing the software.
so why don't you get in touch with support by email and ask for help?
thanks, marc -
5.1.1.0 I meet with the usb conection problems
and audio crackling and vsti with live 9 most recent does not launch
5.1.0.0 was great no problems.
in fact about 48 quality problem return is used -
thanks for editing the subject of your post.
i'll tell you a secret: there is no difference in between 5.1.1 and 5.1.0 for mac users. we just released a new version in order to match the PC version which had to be 5.1.1 for technical reasons. sounds silly but otherwise there is just to many people asking why there is no 5.1.1 for mac.
you wrote: "in fact about 48 quality problem return is used" - i must admit i don't understand what you mean. could you please explain what's wrong with 48k?
thanks, marc