ListingMic Offline: A 30-Second Voice Pitch Becomes a Marketplace Listing, With No Cloud Bill

Description and use

ListingMic Offline turns a 30‑second voice pitch into a marketplace listing draft locally, using Whisper without uploading data to the cloud.

Problem

Sellers spend an hour creating a marketplace listing after recording a long voice pitch, creating a bottleneck in the listing workflow.

Outcome

The demo produced a complete listing draft in under a minute, with accurate transcription of price ($85) and other facts, demonstrating that a local, no‑cloud tool can replace manual typing and cloud APIs.

Workflow

• Record a 30‑second pitch on phone
• Decode audio to 16 kHz mono WAV with ffmpeg
• Transcribe locally with Whisper open‑weight model via faster‑whisper (int8, CTranslate2)
• Split transcript into sentences and match against keyword lists and regexes to extract price, condition, category, colours, materials, features, shipping
• Generate Markdown draft with suggested title, facts box, feature bullets, and checklist
• Review and paste draft into marketplace app

Evidence

It transcribes the pitch locally with the open-weight Whisper model, through faster-whisper. Nothing is uploaded, ever.

Source

The tool pulls out the facts buyers actually search for: the price you mentioned, the condition, a category guess, colours, materials, feature sentences, and what you said about shipping.

Source

The demo output above sits in the project as demo-output.md, alongside the sample audio, so the run is reproducible end to end.

Source