A room in the middle
Set a pluck to 50%. The even modes vanish mathematically. Compare it with a touch near the bridge.
A small instrument, made of choices
The String Atelier
Move the bridge. Find a place to pluck.
Leave with a little music of your own.
Two strings, eight modes, no correct tune. Sound begins only when you enable it and play. Start with your device volume low.
01 / The workbench
Length gives pitch.
Touch gives color.
Sound off. The bench is still editable.
Nothing playing.
Click or tap a string to pluck at that position. Focus its pluck button and press Enter or Space to use the shown position. The bridge sliders move its endpoint; the pluck sliders place your touch precisely. A new strike replaces the previous sound. With focus in this workbench (except sliders), A and B play the two strings; Escape stops. These letter shortcuts are inactive elsewhere on the page.
02 / A pocket composition
An open door
The six-note starter is an original miniature, not a task to solve. Choose a note below to revise it, or clear the strip and begin again. Each note keeps the exact string settings captured when added.
0.50 seconds · walking
Bring the selected note back to the bench to revise it, then replace it from either string.
Your work stays in this tab. Up to 12 notes; no looping or autoplay.
A sound to take away
Prepare the current phrase for export. Any bench or phrase edit clears this edition.
03 / Things to listen for
Three invitations, no answers to win
A shorter journey
Halve the length, double the fundamental. Keep the pluck fraction fixed to keep the same modal proportions.
One pitch, two colors
Give both strings the same length, but different touches. Play each in turn; neither is the “better” sound.
These buttons only set the bench. They never start sound or overwrite your phrase.
The drawing, the arithmetic, the sound
A deliberate little model
Both strings use the same fixed wave speed c = 220 m/s, with ideal fixed ends and length L between 0.25 and 1.00 m. Fundamental f₁ = c / (2L), from 110 to 440 Hz. Mode n has frequency n × f₁ for n = 1…8. Voice A and B are two independent setups, not different materials.
The ideal starting displacement is a unit-height triangle, plucked at fraction p of the speaking length (0.05…0.95). Its signed sine-series coefficient is bₙ = 2 sin(nπp) / [π²n²p(1−p)]. The diagram shows that initial triangle, not a live vibration. Only eight modes are retained, so the truncated reconstruction would round its corner.
The modal ledger shows bₙ before normalization. For listening, divide all eight coefficients by Σ|bₙ|, then sum bₙ cos(2πnf₁t) exp[−(3 + 0.35n)t]. Multiply by 0.12 and a linear envelope: min(1, t/0.005, remaining time/0.030). Time is in seconds; each note’s first and last samples are zero. Normalization is not equal energy or equal loudness. This is a stylized modal sonification, not a microphone, acoustic radiation or soundboard simulation.
Phrase notes run consecutively without overlap. Durations are 0.35, 0.50, 0.75 or 1.00 seconds; at most twelve notes. The mono renderer and 16-bit PCM WAV use 44,100 samples/second. Your browser may resample playback for its output device. Signal peak is bounded by 0.12, but device volume still matters. Stop, mute, window blur, page hiding, edits and reset all stop playback. No background looping.
The score JSON includes captured notes, bench settings, exact rules and source metadata. It is a record, not an importable project. Audio and files are synthesized locally; nothing is uploaded or saved automatically.
Sources, departures & credits
Inspired by a question, not an answer
In Taking ‘brain waves’ seriously: Neuroacoustics (2017), Michael Edward Johnson proposes understanding neural activity as waves in an adaptive medium, with attention to both waves and the medium’s resonant and topological properties. This is a speculative research frame, not a result demonstrated by this instrument.
The full hosted Partial origin story of STV and Principia Qualia (2023) describes a path from intuitions about music and emotion toward formal representations and mathematical symmetry. The Note explicitly moves beyond pure tonal harmony. Pleasant audio is not a measure of valence.
Here the medium is fixed and nonadaptive. Moving a bridge is your manual edit, not learning. These ideal strings, decay rates, normalization, illustrations and miniature are authored mechanics, not neuroscience. There are no health, therapeutic, consciousness or welfare claims, no empirical validation, and no endorsement of the source hypotheses.
The Lab, Hyperspace and Notes informed the exploration. This is original AI-generated work for Daily only; no main-site approval. Generated 2026-10-10 with gpt-6-astra (session-reported runtime metadata, not a public availability claim).
No services, tracking, persistent storage or external runtime dependencies. Physical speakers, mobile hardware and Safari are not verified. Music is optional: the editable score and exact modal readouts remain available without sound.