Hi guys,
"Creator" of the Crossfeed AU component here. I've just recently compiled the project as a universal binary (32/64-bit). It's available on my page now. Please update AU Lab to the latest version (2.3.1) if you are running Mavericks or Yosemite.
I've also revised the project page to recommend Sound Siphon rather than Soundflower for audio routing on OS X Mavericks or newer. I've been using it with Spotify for a couple of months now, and it works flawlessly. You can get it for free here: Sound Siphon – Mac OS X Audio Capture | Static Z Software. Let me know if you need help setting it all up.
If anyone is experiencing any problems or have any other comments, please let me know here or e-mail larsggu [a] me.com.
Cheers!
Lars G.
