NVIDIA Mellotron
Don’t want to install NVIDIA Mellotron? 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.
Multispeaker prosody TTS — historical NVIDIA release.
Best for reference for prosody-controlled TTS. Pricing: free.
What it is
The Mellotron paper code. BSD-3-Clause.
Watch out for: Superseded by Mixer-TTS, FastPitch++.
Install / use
git clone https://github.com/NVIDIA/mellotronWhat people actually do with NVIDIA Mellotron-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 | Yes |
| Streaming / real-time | No |
| Languages supported | 1 |
| HIPAA eligible | No |
Links
NVIDIA Mellotron vs Whipscribe
| Feature | NVIDIA Mellotron | Whipscribe |
|---|---|---|
| Category | Open source | Transcription APIs |
| Pricing | free | $6–$24 one-time packs (credits never expire) · first 20 minutes free |
| Speaker identification | No | Named in the summary, key quotes and chapters |
| Word timestamps | Yes | Yes |
| Streaming | No | No |
| Languages | 1 | 99 |
| Platforms | Linux | Web, API, MCP |
Alternatives to NVIDIA Mellotron
Frequently asked about NVIDIA Mellotron
Is NVIDIA Mellotron free?
Yes. NVIDIA Mellotron is free and open source.
Does NVIDIA Mellotron work on Mac, Windows and Linux?
NVIDIA Mellotron runs on Linux. It is not listed for other platforms; check the vendor for anything beyond Linux.
How do I install NVIDIA Mellotron?
Clone and run it from source: `git clone https://github.com/NVIDIA/mellotron`. Expect to install its dependencies yourself — the README has the exact steps per OS.
How many languages does NVIDIA Mellotron support?
NVIDIA Mellotron lists 1 languages.
Does NVIDIA Mellotron identify different speakers?
No. NVIDIA Mellotron 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 NVIDIA Mellotron give word-level timestamps?
Yes — NVIDIA Mellotron produces timing per word, which is what subtitle cues and clip boundaries need.
Can NVIDIA Mellotron transcribe live audio?
No — NVIDIA Mellotron works on finished files, not a live stream.
Is NVIDIA Mellotron HIPAA compliant?
NVIDIA Mellotron 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 NVIDIA Mellotron?
Superseded by Mixer-TTS, FastPitch++.
Who is NVIDIA Mellotron best for?
Reference for prosody-controlled TTS.
Does NVIDIA Mellotron run offline?
NVIDIA Mellotron runs on your own machine — it is open source, so nothing leaves the computer unless you configure it to.
Can I use NVIDIA Mellotron in the browser?
No — NVIDIA Mellotron is a Linux application, not a web app. You install it rather than sign in to it.
Where is the NVIDIA Mellotron source code?
On GitHub at github.com/NVIDIA/mellotron.
What kind of tool is NVIDIA Mellotron?
In this directory NVIDIA Mellotron is filed under tts, legacy, nvidia as a open-source tool.
What are the alternatives to NVIDIA Mellotron?
There is a side-by-side page at /tools/nvidia-mellotron-alternatives comparing NVIDIA Mellotron with the closest tools in the same category on price, platform and features.
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