Is Spei Studio really free to use?
Yes. Spei Studio provides free audio editing online and stem isolation without paywalls, fees, or account restrictions.
Free Audio Editing Online & Multitrack DAW
Edit audio directly inside your web browser with sample-accurate waveform zooming, non-destructive trimming, audio splicing, reverse playback, crossfading, gain envelopes, and multitrack mixing. No software installation, subscriptions, or file size restrictions.
AI Neural Stem Separation & Vocal Remover
Powered by local Demucs v4 neural models running via ONNX Runtime Web. Isolate pristine vocal tracks, drum beats, bass lines, and instrumentals on your own device's CPU and GPU without uploading audio files to cloud servers.
40+ Client-Side DSP Audio Tools
Master your audio with professional WebAssembly signal processing tools: 10-band parametric equalizer, dynamic compressor, studio reverb, stereo delay, pitch shifter, tempo changer, chorus, flanger, and LUFS loudness normalizer.
Public Song & Playlist Batch Downloader
Download and convert public songs and playlists. Export to 320kbps MP3 with LAME Wasm, 16-bit lossless PCM WAV (44.1kHz / 48kHz), FLAC, AAC, or MP4 video with custom album artwork and synchronized lyrics.
Zero-Upload Privacy Architecture
Your audio files, stems, and creative projects never leave your machine. All computation executes locally inside your secure browser sandbox, ensuring 100% creator privacy and complete intellectual property ownership.
Frequently Asked Questions
Are audio files uploaded to your servers?
No. Spei Studio runs 100% locally via WebAssembly and Web Audio API. Audio data never touches external servers.
Can I use Spei Studio offline?
Yes. Spei Studio is a Progressive Web App (PWA) that installs locally and works completely offline without an active internet connection.