Run on your own infrastructure.
Download the weights, adapt the model and build on it. You choose the hardware and where your audio is processed.
Klang Pianissimo is an open speech-to-text model for Danish, fine-tuned from NVIDIA’s Parakeet v3. It sets a new standard for Danish, with the highest accuracy on real, everyday speech.
Pianissimo makes fewer errors on real Danish speech than any other model we tested, open or closed: 10% fewer than Edda, 11% fewer than Saga and 4% fewer than ElevenLabs Scribe v2.
Try transcribing H.C. Andersen, or try the model on your own audio.
Connecting to the model…
Drop a file onto the player. Up to 90 minutes. Audio is sent to Klang for transcription.
Open source and fast
to transcribe an hour of audio
Most large speech models are trained mainly on English, and the Nordic languages fall behind. We think that's best solved together, in the open. That's why Pianissimo is released with open weights, so anyone can build on it and share what they make. This is our way of contributing to the Nordic speech ecosystem.
Pianissimo is an open model, built for sovereignty. Download the model weights and run it on your own infrastructure. You choose where your audio is processed.
Pianissimo is open under CC BY 4.0 and runs on your own computer. Build something with it and submit your project to be featured here.
Transcribe audio files and microphone recordings right in Chrome. Your audio stays on your computer.
We’d love to see your project and share more ways to use Pianissimo.

Klang is a Nordic AI speech lab building a perfect memory of all your conversations - with transcriptions, summaries, and insights. Built in Europe, with trust at its core.