Thanks! Does it mean I can now upload tracks to the mz-rh1 without using their ugly piece of software? Or is this still impossible due to the use of cryptographic keys?
The firmware in a sense does not change anything regarding connectivity (for now). If you want to record normal MD, just use Web MiniDisc Pro. For HiMD, I recommend the Electron version of Web MiniDisc Pro, but it's not yet as stable as SonicStage (due to the complixity of Sony's system).