Boom 3D - Audio enhancer with 3D surround sound
Odio - Create GIFs with live audio
Boom 2 - Boom is a simple volume booster that lets you boost the volume of your Mac and your music files.
Soundescape - Generative 3D audio environments for focused work
eqMac 2 - The open-source macOS audio optimizer 🎛️
SoundSource - The sound control that should be built into MacOS