If you want quality for classic Nintendo, you’re probably better off with midi files, which are like sheet music for a synthesizer your computer can play. This way it’s original full quality sound without any recording/large files.

VLC/Windows Media Player can play them. You can search up a few good archives like https://www.vgmusic.com/music/console/nintendo/nes/

There’s a lot of gamerips on https://downloads.khinsider.com/