"Like all analog formats, cassette tapes decay over time. In fact, it’s likely yours have already lost some fidelity. If you want to save those old mixtapes and home recordings, it’s best to digitize them right away. Thankfully, this is an easy process. You don’t have to be a computer whiz or an audiophile to follow this simple guide. And you shouldn’t have to spend any more than $25 on this project (it’ll probably cost even less)." https://www.reviewgeek.com/19889/how-to-digitize-your-cassette-tapes/