Zsh has a module called zmv which lets you do things like: zmv '(??)-(*).mp3' '$1 - ${(C)2:gs/_/ }.mp3' Which would change "01-foo_bar_baz.mp3" into "01 - Foo

Zsh has a module called zmv which lets you do things like: zmv '(??)-(*).mp3' '$1 - ${(C)2:gs/_/ }.mp3' Which would change "01-foo_bar_baz.mp3" into "01 - Foo Bar Baz.mp3"