Every tool, every export, every download — free. No trial, no card, no monthly bill. Just the analysis layer pro DJs and producers pay for, available on the laptop you already own.
We were students when we needed these tools. We couldn't afford the $20/month subscriptions. SignalKey's free tier is the actual free tier — every tool, no quality reduction, no signup, sane daily caps. (Studio at 50% off ($9.50/mo) if you need the workbench, 24-bit WAV stems and the API.)
Every tool below is free, no signup, no watermark. Click any card to open it.
Quick BPM for any track — useful for music theory classes, dance practice or learning a cover.
Find the key of any song. Camelot code surfaced for crate-digging across your library.
Lift the chord chart from any reference. Stop guessing chord changes by ear — verify against the audio.
Free tuner for guitar, bass and orchestral instruments. ±0.1 cent precision on your phone or laptop.
Practice metronome with compound time signatures and triplet subdivisions. Better than the free apps.
Convert audio to MIDI for transcription homework. Pull the MIDI into MuseScore for sight-reading practice.
How a college music student uses SignalKey across one semester.
Assignment says 'find the key and chord progression of three pop songs.' You do it in 5 minutes with Key Finder + Chord Finder. Spend the saved hour on what your professor really wants — analysis, not transcription.
Your group is covering a song outside your vocal range. Pitch Shifter drops it -3 semitones. Tempo Changer slows the bridge to 75% for transcription. Print the new key and chord chart for your ensemble.
Tuner, Metronome and Tap Tempo open in three browser tabs. No paid app. No ads in the practice flow (just one short ad gate when you upload — never during live mic tools).
Write your analysis paper. Cite the glossary articles for definitions. Embed the BPM and key in your essay. Your professor sees you used real audio analysis, not Wikipedia.
“I built my entire dissertation analysis layer on SignalKey. 40 tracks analysed for BPM, key, energy, valence — for free. My professor still asks how I did it.”
— Music undergrad workflowYes. Every tool is free for everyone — students included — with sane daily caps. Tool pages and the Studio workbench are 100% ad-free; ads only appear on the long-form learning pages (glossary, charts, song database) where a single quiet 'Sponsored' unit doesn't interrupt a workflow.
Drop a track and see the full analysis pass — BPM, key, Camelot, stems, MIDI, LUFS — in one go.