MACOS 可單獨調整應用程式音量
如果你用的是MAC的系統, 當使用瀏覽器、PODCAST、SPOTIFY，同時開起音量又都一樣大小聲, 想要各別調整的話, 就可以用這應用程式, 可以試看看.
SoundSoure: https://rogueamoeba.com/soundsource/
SoundSource - A Superior Sound Control
Access your Mac’s audio devices, control per-app audio, and much more, all from the menu bar.
