Real time macOS AI Voice Changer Setup

I want to sound convincingly different—older, younger, male or female—while making web calls on my mac. Your job is to identify the best real-time solution for macos or ideally on web sever where my webrtc is hosted... (Budget: $40 - $60 USD, Jobs: AI Development, AI Integration, AI Voice Agents, AI Voiceover, Audio Processing, Audio Services, Sound Design, Voice Over, Voice Talent)