The Gate to R'Lyeh

You are a graduate student investigating the mysterious disappearance of your professor Crawford Tillinghast. Average runtime so far is about 1 hour. If you are reading this, I am not dead. I am stuck beyond this plane. You must release me. I am nearly helpless within this terrible cosmic purgatory. I am sorry I tried to hide my work, the University was not pleased with my unpublished discoveries and had threatened to cut funding if I persisted. You'll need to get into my lab and turn on the analog resonator. That should open the portal for my return. Best, Professor Tillinghast Hint: Get and assemble the 9 note pieces before solving the puzzles with missing pieces