Logic Pro X Disc too slow and Lou pop

Larry B. Rubin

I am getting the Disc too slow message in my Logig pro x . I have tried every suggestion that I could find to no avail.The message is accompanied by out loud audio pop. This is happening with as little as two audio tracks. I have my audio path on a SSD along with my samplers. I have a Mac mini with 8 gigs of ram and a very old Tascam US 144 interface. Could the old interface be the culprit? I have tried all the buffer tweeks ,Help is appreciated.