AVOX 4 includes the following plug-ins:
- Harmony Engine Evo vocal modeling harmony generator
- Mic Mod EFX classic microphone modeler
- Mutator Evo extreme voice designer
- Articulator Evo digital talk box
- Warm tube saturation generator
- Aspire Evo aspiration noise processor
- Throat Evo physical modeling vocal designer
- Duo Evo vocal modeling auto-doubler
- Choir Evo vocal multiplier
- Punch Evo vocal impact enhancer
- Sybil Evo variable frequency de-esser