FastSpeech 2
Don’t want to install FastSpeech 2? Drop the file here.
The first 20 minutes of any recording are transcribed free: a recording up to 20 minutes transcribes in full, a longer one is previewed, and a pack from $6 (500 minutes) transcribes the rest and opens every export, and credits never expire.
Non-autoregressive TTS reference implementation — fast and parallelizable.
Best for embedded TTS where inference latency matters more than absolute quality. Pricing: free (MIT).
What it is
FastSpeech 2 from Microsoft Research is a non-autoregressive TTS architecture that dramatically reduced inference latency vs. Tacotron-style models. Still widely cited; ming024's MIT-licensed PyTorch port is the canonical implementation for self-hosters. Consent posture: synthetic-only architecture.
Watch out for: Older architecture (2021) — VITS and XTTS now beat it on naturalness.
Install / use
git clone https://github.com/ming024/FastSpeech2What people actually do with FastSpeech 2-style transcription
The tool is the means. These are the jobs — each one priced at published rates, each one wired up on its own page.
Features
| Speaker diarization | No |
| Word-level timestamps | No |
| Streaming / real-time | No |
| Languages supported | 1 |
| HIPAA eligible | No |
Links
FastSpeech 2 vs Whipscribe
| Feature | FastSpeech 2 | Whipscribe |
|---|---|---|
| Category | Open source | Transcription APIs |
| Pricing | free (MIT) | $6–$24 one-time packs (credits never expire) · first 20 minutes free |
| Speaker identification | — | Named in the summary, key quotes and chapters |
| Word timestamps | — | Yes |
| Streaming | — | No |
| Languages | 1 | 99 |
| Platforms | Linux | Web, API, MCP |
Alternatives to FastSpeech 2
Frequently asked about FastSpeech 2
Is FastSpeech 2 free?
Yes. FastSpeech 2 is free and open source (free (MIT)).
Does FastSpeech 2 work on Mac, Windows and Linux?
FastSpeech 2 runs on Linux. It is not listed for other platforms; check the vendor for anything beyond Linux.
How do I install FastSpeech 2?
Clone and run it from source: `git clone https://github.com/ming024/FastSpeech2`. Expect to install its dependencies yourself — the README has the exact steps per OS.
How many languages does FastSpeech 2 support?
FastSpeech 2 lists 1 languages.
Does FastSpeech 2 identify different speakers?
No. FastSpeech 2 does not label speakers; a conversation comes back as one continuous text. If you need speaker labels, that is a separate tool or a different service.
Does FastSpeech 2 give word-level timestamps?
No — FastSpeech 2 produces segment or sentence timing only, so subtitle cues can land mid-word.
Can FastSpeech 2 transcribe live audio?
No — FastSpeech 2 works on finished files, not a live stream.
Is FastSpeech 2 HIPAA compliant?
FastSpeech 2 does not claim HIPAA compliance. For PHI, run it on infrastructure you control or choose a service that will sign a BAA.
What are the limitations of FastSpeech 2?
Older architecture (2021) — VITS and XTTS now beat it on naturalness.
Who is FastSpeech 2 best for?
Embedded TTS where inference latency matters more than absolute quality.
Does FastSpeech 2 run offline?
FastSpeech 2 runs on your own machine — it is open source, so nothing leaves the computer unless you configure it to.
Can I use FastSpeech 2 in the browser?
No — FastSpeech 2 is a Linux application, not a web app. You install it rather than sign in to it.
Where is the FastSpeech 2 source code?
On GitHub at github.com/ming024/FastSpeech2. It is maintained by Microsoft Research / community.
What kind of tool is FastSpeech 2?
In this directory FastSpeech 2 is filed under tts as a open-source tool.
What are the alternatives to FastSpeech 2?
There is a side-by-side page at /tools/fastspeech2-alternatives comparing FastSpeech 2 with the closest tools in the same category on price, platform and features.
Whipscribe is a hosted transcription service. If you want transcripts without running infrastructure, paste a URL or drop a file in the form below — you'll have a transcript in seconds.
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