In your browser
Free audio tools
Three tools built for my own practice and left open for everyone else. They run entirely in your browser — nothing uploads, nothing installs, and your audio never leaves your machine.
Ear Trainer
Identify a boosted or cut EQ band by ear, or name a ringing feedback frequency. Pink noise or your own audio, adaptive difficulty from 3 bands up to 28 third-octave centres, multi-band mode and a blind mode with no visual cues.
EQ ID · feedback ID · XP, levels, daily streak
Open the Ear Trainer →Interval & Chord Trainer
Intervals from 2nds through the octave — ascending, descending or harmonic — and chord qualities including 7ths. Optional key context plays a tonic or a I–IV–V–I cadence first, so you hear intervals against a root the way music actually works.
Interval ID · chord quality · Rhodes-style synthesis
Open the Interval Trainer →Reactive Visualizer
Seven modes and sixteen palettes reacting to your mic, an audio file, or a browser tab. Lock the output frame to 1080p or vertical, layer modes together, drive it from a MIDI controller, and record straight out of the page.
Mic · file · tab audio · OBS pop-out
Open the Visualizer →For this tool: OBS setup guide · ready-made looks
What they cost
The visualizer is free in full — every mode, every palette, mic, file and tab input, the OBS pop-out, all of it, with no email and no account.
The two trainers give you a few rounds free and unlock completely with an email address. That buys the full band sets, adaptive difficulty, XP and streaks, blind mode, multi-band mode, and loading your own audio. One email unlocks both trainers permanently on that device, and the same unlock covers the guides.
No trial timer, no card, no subscription. The tools are free because the sound packs pay for them.
How they work
- Everything is local. All the DSP runs in your browser with the Web Audio API. No audio is uploaded, recorded or sent anywhere — the server only ever hands you the page.
- No AI. The trainers use real synthesis and real filters; the visualizer is its own engine, not a wrapper around someone else's preset library.
- Desktop and mobile for the trainers. The visualizer needs a desktop browser for tab-audio capture, which iOS Safari does not support.
Free download12 or 15 WAVs
Free sounds to practise on
A sampler of hand-made game audio, straight to your inbox — real material to load into any of these tools.