The Black Box SAVR thing has an RS-232 port to go to the computer, and then it connects to the changers via the same type of cable you used to connect them to each other (1/8" mono plug cable). Each changer has two of the Sony AI II (of whatever they call that proprietary serial interface) ports on the back. So, mine are connected to each other, and then the "master" is connected to the black box which is then connected to the computer. You have to have BOTH the software and the SAVR device.
Still, it was worth it to me, even though I mostly use the changers without the playlist computer software. Having the software look at each disk, look it up, download the tracklist, artist, album title, album art, etc. was cool. Being able to then upload the artist and album title information to the changers was worth the price of admission to me. If not for that, all my disks would still say "Disk **123". I do enough data entry everywhere else in my life.
