Real-Time Call-Center Voice Changer

I need a production-ready, real-time voice-changing application for my call-center environment. Agents must be able to switch among six high-quality U.S.-accented voices—three male and three female—without audible lag while they are on live VoIP calls... (Budget: ₹12500 - ₹37500 INR, Jobs: Asterisk PBX, Audio Engineering, Audio Processing, C++ Programming, Mobile App Development, Python, Software Development, Voice Over, VoIP, WebRTC)