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Interactive explainers and notes on the physics underneath music — the part you can actually hear. Everything here runs in the browser, no signup, no plugins.
What is music,
anyway?
Twelve notes, seven letters, and one very good approximation.
An interactive, sound-on explainer of music theory as physics and math. Every claim on the page is something you can hear — the harmonic series, the tritone, the Pythagorean comma, why the octave splits into twelve and not some other number. All audio is synthesized live with the Web Audio API. Two routes through it: a theory path and a DJ path.
Start here Interactive · Sound on 2026 — 08
Demystifying digital
music metadata
Which numbers in your library are measurements, and which are guesses.
Sample rate, bit depth, bitrate, codec, BPM, key — a field guide to what each field actually means, why a “24-bit studio master” can be a 128 kbps MP3 in costume, and how to catch one. With a spectral-ceiling visualiser, an audible cutoff demo, and a bitrate calculator.
Interactive · 3 tools 2026 — 08
The Signal
Path
Every audio cable answers the same two questions.
TS, TRS, RCA, XLR, optical, eARC, USB-C — what actually travels through each wire, why balanced cables stay silent across a stage, what a mixed-end adapter gives up, and why some speakers need an amp. With a cable chooser, a signal-chain builder, an animated noise-cancellation demo, and a troubleshooting diagnoser.
Interactive · 30 terms 2026 — 09
Ohms, Volts
& Drivers
Why a $1,300 earphone can sound worse out of a laptop than a $100 one.
Impedance, sensitivity and voltage swing in plain language — why “hard to drive” is often a compliment, what an amp actually fixes, and why the number of drivers inside almost never matters.
Field guide 2026 — 09
A5+ / 10s
Alignment
Getting a subwoofer to disappear behind a pair of five-inch monitors.
Placement, crossover, level and polarity, and how to measure each one with gear you already own — the chain, the topologies that work, and what to listen for when the sub stops announcing itself.
Room setup 2026 — 10
How do I use AI
for music production?
Lyrics, MIDI, Suno and Ableton: the whole loop, and the settings for each stage.
The EVANIUM production loop step by step, the Suno prompt rules that survived hundreds of generations, my favourite style boxes to copy, a lyrics template with production notes, and the local AI tools that make the DAW work fast.
Interactive · Studio notes