Foundations
- Sound & frequency
- Gain & headroom
- Bit depth & sample rate
Mac development preview · v0.13
See what
you hear.
Learn how audio behaves by seeing it: change a control, hear the A/B difference, and watch the waveform, spectrum, spectrogram and meters respond in the same window.
Explore 21 labs ↓
21 LABS · SIX TRACKSA clearer path
A clearer path
from hearing to understanding.
Start with the foundations or explore the process you want to understand.
Tone
- Equalization
- Filters & resonance
- Clipping & harmonics
- Saturation
Dynamics
- Gating
- Compression — 5 guided lessons
- Multiband
- Sidechain ducking
- Transient shaping
- Loudness & limiting
Time & space
- Delay & echo
- Chorus, flanger & phaser
- Reverb & space
Stereo
- Polarity & phase
- Stereo width & mono
Practice
- Fix the mix
- Order of effects
- Guess the tempo
Get your hands on the graph.
Drag EQ frequency and gain, scroll for Q, shape filter cutoff and resonance, move delay echoes, adjust reverb decay and pre-delay, and set compressor threshold and ratio directly on the graphs. Fix the mix adds draggable low-cut, bell and shelf controls.
Train your ears.
A blind quiz in twenty labs: hear the original and mystery version, guess the setting, then reveal the answer on the scopes. Scores and streaks save per lab.
Find the beat.
Guess the tempo of eight built-in loops, from lo-fi hip-hop and reggaeton to house, techno and drum & bass. Tap along, then fine-tune until the click locks to the beat.
Learn by fixing it.
Fix a broken copy of a reference mix until the match score reaches 100%. Compare two effect orders side by side, including the classic gated snare.
Hear the difference. See the detail.
- A/B listening, level-matched where it matters, presets and a “Try this” experiment in every lab.
- Hear the Δ: listen only to what a processor adds or removes.
- Spectrogram in every lab, pre/post waveform and spectrum, reduction traces, response curves and harmonic bars.
- Live IN/OUT/GR LED meters on an audio-taper scale.
- Stereo for reverb and stereo labs; mono elsewhere.
Your workspace. Your focus.
Choose Console or Ivory, six accent colors, and controls on the right or along the bottom. Fully offline: no account, microphone or network.
Make listening
a learning habit.
Mac with Apple silicon (M1 or newer), macOS 13 Ventura or newer. The Mac build is not notarized yet. No public download is available.
Ask to join the tester list ↗An educational listening environment, not a real-time VST3/AU plug-in. Effects are teaching designs, not models of named hardware. Loudness measurements use short teaching loops and are not a certified meter. Guess the tempo uses built-in loops, not your music library. No public mobile or web release is available.