Checking GPU Local processing

Browser concert lab

Put the room
back into the record.

Split a master into stems, place each part on stage, add a modeled venue and crowd, then print a 24-bit mix. Files stay on this device.

Vocal Rhythm Stage

One master, full stem and venue control

Drop audio hereMP3, WAV, FLAC, AAC or Ogg

Need source material?

Venue modelImpulse and early returns

Room and PALive preview updates

Reverb return28%

Room size62%

Stage width72%

Listening distance16%

Bass bloom+2.5 dB

PA air+1.5 dB

Console drive16%

AudienceProcedural bed and vocal spill

Crowd floor26%

Audience singalong · needs vocals30%

AI stem deskHTDemucs v4 · WASM + WebGPU

Quality model4 stems, best browser balance

Load a song to open the stem desk.

The runtime is Apache-2.0. Demucs model weights are for personal and research use. The browser caches the model when storage quota allows.

Print concert mix44.1 kHz · 24-bit WAV · venue tail included

Concertify runs as an Astro static page with a client-side React audio island.Demucs WASM source