Change the volume and output device for individual apps. Adjust your Mac's audio device settings and levels instantly, from anywhere. Even apply built-in and third-party audio effects to any audio on your Mac
I think Audio Hijack is one of the coolest and most powerful apps on the Mac for an audio nerd.
Check out my tutorial on using Apple Clips v2 to make fun videos for Instagram, Facebook, or wherever you publish product or services demos.
Clips is great at creating videos that make use of videos, still photos, titles, and stickers to tell a story - whether it's for your business or just for fun with your family.