dj745, here is a quick excerpt from A Guide To Hi-MD Uploading " Limitations: * Uploading is applicable ONLY to tracks recorded on Hi-MD via Mic-In, Line-in, or optical in to Hi-MD formats: PCM, Hi-SP or Hi-LP * Hence, if you have MD / MDLP / NetMD recordings (SP, LP2, LP4), they can not be uploaded, even if you have a Hi-MD player * SonicStage is a Windows-only program -- no Mac, Linux, etc. - though newer pro models such as the MZ-M100 [a slightly modified and renamed RH-10] can upload PCM tracks to Macintosh computers using dedicated Mac software. * Wave Converter will only export tracks that are from an analogue source. If you record on your HiMD using the optical input, you can upload the tracks but not convert them to WAV with Sony's Utility. HiMDRenderer works perfectly for this, however. "