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macOS Native Speech AI & Subtitle Pipeline

Next-Generation Speech Recognition & AI Workflow for Mac

Real-time internal system audio subtitles, high-accuracy file transcription, word-level timestamps, speaker diarization, and automated AI polishing workflows.

DuRT—Speech Recognition & AI Pipeline
DuRT real-time subtitles and AI workflow interface screenshot

Core Capabilities

Built for Power Users, Language Learners & Creators

Everything you need from live low-latency meeting captions to batch media subtitle generation.

Realtime Live Subtitles

Record system audio via ScreenCaptureKit or microphone in real-time. Floating translucent window with customizable typography and echo cancellation.

Media File & URL Transcription

Drag-and-drop local audio/video files or paste online video and audio streams. Batch processing with high-speed GPU acceleration.

Word Timestamps & Diarization

Precision alignment down to millisecond word-level timestamps. Multi-speaker clustering without requiring voice enrollment.

Automated AI Pipeline

Chain ASR transcription, LLM translation/proofreading/summarization, and TTS voiceover into a reusable one-click workflow template.

Privacy-First & Offline Speech

Native on-device Apple Speech recognition for offline transcription without internet access. Pair with local Ollama or OneASR for 100% data privacy.

BYOK & Service Aggregation

Seamlessly connect OpenAI, Claude, DeepSeek, OneASR, Alibaba Cloud, Tencent, and custom self-hosted endpoints with Bring-Your-Own-Key.

Modular Architecture

Visual Pipeline, Endless Possibilities

DuRT abstracts complex speech and LLM processing into 6 standardized, chainable step modules.

1

Audio Source

ScreenCaptureKit, Mic, File, or Web URL

2

ASR Recognition

Apple Native Speech, OneASR Gateway, OpenAI Whisper

3

LLM Polish & Translation

Proofread, Translate, Segment, Summarize

4

TTS Voiceover

Multi-role Voice Synthesis & Speed Tuning

5

Export Artifacts

SRT, VTT, JSON, TXT, Audio MP3/AAC

FAQ

Frequently Asked Questions

Elevate Your macOS Audio & Subtitle Workflow

Download DuRT today and experience the speed, accuracy, and power of native macOS speech intelligence.

Requires macOS 13.0 (Ventura) or later. Optimized for Apple Silicon (M1/M2/M3/M4) & Intel.

Released under the MIT License.