SampLab

Six free audio and MIDI utilities running locally in your browser, covering transcription, tempo detection, band splitting, and synthesis.

A practical suite of six browser-based audio and MIDI utilities. All processing runs directly on your device with no accounts or paid tiers.

Select a utility to process media on your machine. Technical limits apply: audio up to 50MB (1 second to 10 minutes; decoding varies by format) and MIDI files up to 50MB (rendering up to 10 minutes, 20,000-note limit).

Transcribe melodic lines using Spotify Basic Pitch. Clear single-instrument or melody audio works better than dense mixes.

Estimate tempo and musical key directly from imported audio tracks to assist arrangement and beatmatching.

Analyze harmonic structures across audio tracks to estimate chord progressions for transcription reference.

Split audio into overlapping bands: low (~180 Hz), body (~900 Hz), and high (~2800 Hz). Filters frequencies rather than isolating stems, vocals, drums, or bass.

Synthesize .mid and .midi files into sound directly in your browser, supporting up to 20,000 notes and 10 minutes of playback.

Generate readable lead sheet notation from pitch, timing, and chord estimates for practice and drafting.

SampLab Pro is an independent project not affiliated with the Samplab VST or samplab.com. Processing executes locally within the browser, keeping your audio private. Initial model loading can take extra time depending on connection and device performance.

Every tool is free to use with no subscription signups. Outputs are algorithmic estimates designed to be checked by ear.