I still have my Color Computer I in a box somewhere in the garage, with the original large cassette tape player I used to read and write cassette tapes with. I've probably forgotten exactly what volume I had to keep it at to get it to read the tapes. As a dumb kid, I managed to get the keyboard swapped out (hated the chiclet one it came with), and I think I found someone who swapped out the 16K it came with for (iirc) 128K. I should really see if it boots. Or even turns on.