If you want to gradually keep your Sanity ticking up over time and cancel out the adverse effects of exploring the caves, you will need to find the Cassette player and some tunes to play on it. However, you may be wondering where you find this item. There are two within the game, one within Cave 2 and the other located on the Yacht to the south. Then there are five tapes, two of which are found around shallow graves near the Yacht, and the rest are scattered throughout the cave system. This is a great item that not only boosts your Sanity but can also aggro enemies and will boost your energy levels. However, playing music will draw attention to yourself, so if you are being stealthy, be sure to press pause on your Walkman.