I've experimented with integrating real-time voice modulation features into a speaker system, mainly for personal use during karaoke sessions. For live vocal modifications, there are both software and hardware solutions available, each with their own pros and cons.
Software solutions are often more flexible and cost-effective. They allow for a range of effects like pitch correction, reverb, and echo, all customizable through user-friendly interfaces. Popular software includes apps like Voicemod or VST plugins that can be used with digital audio workstations. The key is to ensure your computer is powerful enough to handle real-time processing without significant latency, as delays can be quite disruptive during live performance.
On the hardware side, dedicated vocal processors like those from TC-Helicon or Roland offer robust solutions designed specifically for live performance. These units typically provide superior sound quality with minimal latency but at a higher cost compared to software solutions.
For your setup, if sound quality and minimal latency are critical, investing in a top-notch hardware vocal processor is advisable. However, for more casual or home use, a software-based approach might be more than sufficient. In any case, pairing the chosen solution with a quality speaker system will enhance the overall experience, ensuring the modulated audio is clear and impactful.