Normalize gain
Normalize to peak RMS: shift+n.
Set RMS normalize options: cmd+shift+n.
Normalize to specified peak level: cmd+opt+shift+n.
Normalize to -23 LUFS: opt+shift+n.
Normalize to peak RMS: shift+n.
Set RMS normalize options: cmd+shift+n.
Normalize to specified peak level: cmd+opt+shift+n.
Normalize to -23 LUFS: opt+shift+n.