Be it for correcting those slightly out-of-tune notes from your singer, or going all the way to a Cher effect, an auto-tune plugin might come in handy. There’s not a lot of those designed for Linux, though choices do exist : Autotalent , a LADSPA plugin by Tom Baran TalentedHack which is a port of the former to the LV2 format with some additional work by Jeremy Salwen VocProc , another LV2 plugin...