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Audio Calc: Tuning Temperament Frequencies
x402
Audio Calc: Tuning Temperament Frequencies is a paid API for AI agents from audio-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-30).
Returns frequencies, cents, and ratios for all 12 chromatic notes in equal, 5-limit just, Pythagorean, or quarter-comma meantone tuning, relative to a specified root and A4 reference pitch.
Price / call$0.02
Success—
StatusUnknown
How this service works
Frequencies, cents and ratios of the 12 notes in equal, 5-limit just, Pythagorean or quarter-comma meantone tuning.
Output
Returns a structured list of all 12 chromatic notes with their: note name, scale degree, frequency in Hz, frequency ratio relative to root, cents value, cents deviation from equal temperament, and equal-tempered Hz equivalent. Also returns summary metadata including the temperament name, root note, A4 reference, fifth/major-third/minor-third cents, max deviation from equal, and a human-readable description of the temperament.
Example use cases
Just intonation synth tuning table
“I'm building a synthesizer patch in just intonation — can you give me the Hz frequencies and ratios for all 12 chromatic notes rooted at A4 = 432 Hz using 5-limit just tuning?”
Comparing meantone vs equal temperament
“Show me how quarter-comma meantone tuning compares to equal temperament — I want the cent deviation for each of the 12 notes, rooted on C4 at standard A4 = 440 Hz.”
Historical tuning for early music recording
“I'm recording a Baroque piece and need Pythagorean tuning frequencies for all 12 notes starting from D3 with A4 at 415 Hz — can you calculate that for me?”
Technical details
Endpoint
GEThttps://audio-calc.x402tookit.com/tuning-temperament?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need precise, mathematically correct frequency tables for historical or alternative tuning systems — particularly equal, just, Pythagorean, or quarter-comma meantone. Prefer it over generic music theory APIs when you need the full 12-note chromatic set with ratios, cents, and deviations all in one call, or when comparing how a tuning system diverges from equal temperament. It is especially useful for instrument tuning, musicology research, audio synthesis, and early music performance contexts.
Side effects
- Missing required 'temperament' query parameter returns an error
- Invalid temperament value (not one of equal/just/pythagorean/meantone) causes rejection
- Malformed root note string (e.g. unrecognized accidental or octave) may return an error or fall back to default
- A4 value outside a reasonable audio range may be rejected or produce unexpected results
- Payment not included or insufficient USDC causes HTTP 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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