I just bought an Akai S20, I added a 16meg 72 pin SIMM(70 ns speed)to upgrade the memory before I even used it. When I turned it on, it said "r16" like it should. My problem is, that it only records(and perhaps plays back)in mono. I have the coarse button set to "S" for stereo, but it comes out mono. I know all of my cables are fine. Even the sample disks that came with it only play back in mono(even thru headphones).Please help. Thank you. -merriphew