hi not sure if it is reported before, didnt find the exact problem in the forums, but to me it looks like a bug: M-Audio Fast Track Ultra 64 bit ASIO driver is not properly detected by Reaper 64 bit on Windows 7 64 bit, everything latest versions. I use the M-Audio Fast Track Ultra USB audio interface. I can select the 64 bit M-Audio ASIO driver in Reaper, but none of the in or outputs will show up in the driver section. I can reproduce this on 2 different systems (desktop+laptop) running Win 7 x64. Its not a problem of the M-Audio drivers, since both Cubase 7 64 bit and Hauptwerk Church Organ can use the 64 bit M-Audio driver. A 3d system, running Win 7 32 bit doesnt show any ASIO issues in Reaper with this M-Audio interface. I also can revert to Reaper 32 bit (on Win 7x64) and use the M-Audio ASIO without a problem. In all, to me it appears that Reaper 64-bit is not able to properly detect the 64 bit M-Audio Fast Track Ultra ASIO driver. I used plenty of other M-Audio cards in the past without any problem on Win7x64, all of which are deleted from the system btw. Any suggestions? best regards, Martin