So, I've recorded Razor playing piano and played it back at green tentacle's room. He thinks it's awesome but soon gets depressed saying he's never going to get a contract. He turns off the stereo and takes out the tape. He leaves a tape over his bed. When i pick it up i see it's his demo. Now I don't have a tape that works in the recorder at the piano room anymore, only green tentacle's demo tape. I haven't got the key from the glass chandelier yet, and I strongly suspect that I need to play the Tentacle Mating Calls to get it. Have I reached a dead end? Is there any other way to get the key or another tape?

Nevermind, I've realized I don't need the key.

There are several ways to mess things up in this game if done in the wrong order, gladly there are alternatives to get out of the dungeon without that key. :)