How I Implemented Supertonic TTS into My Desktop App, OpenBench AI

I recently added text-to-speech (TTS) capabilities to OpenBench AI, my local-first Tauri desktop chat app. Rather than relying on a single TTS service, I built a dual-engine system that lets users choose between browser-native speech synthesis or a high-quality on-device neural model. Here's how I did it. The Goal Users should be able to click a speaker icon on any assistant message and hear it read aloud. They should have options: lightweight and built-in, or natural-sounding but requiring a larger model download. All processing should happen localy with no API calls, no privacy concerns.