Connecting Captions Local Private AI Interpreter

A potentially AI-related product surfaced from a public Show HN launch post.

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Launch summary

Hi HN, I built Connecting Captions, a live captioning and translation overlay for macOS that runs entirely on-device. Nothing goes over the network: no API calls, no audio leaving your machine, and it keeps working offline. I wanted live translation I could use in meetings and conversations without worrying about connectivity, latency spikes, or sending sensitive audio to a third party. The technically interesting part is a low-latency, self-correcting pipeline for speech-to-text and translation. It has two modes: Sentence mode: buffers until a sentence boundary, then translates with full context. It’s more accurate, especially between languages with different word order. Streaming mode: translates word by word as speech arrives, trading grammatical accuracy for minimal delay. Current state: Platform: macOS Models: Whisper Latency: ~200 ms Languages: 25 Code: https://github.com/chrisswimlee/connectingCaptions I’d love feedback, especially on the self-correction approach and which use c

1 Hacker News pointsDetected Oct 18, 2026

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