{"slug":"audio-calc-x402tookit-com-interval-ratio-ba6dd2","title":"Convert a frequency ratio (3:2) to cents and semitones or back, name just and Py","host":"audio-calc.x402tookit.com","method":"GET","resource":"https://audio-calc.x402tookit.com/interval-ratio","category":"image","description":"Convert a frequency ratio (3:2) to cents and semitones or back, name just and Pythagorean intervals and commas, apply to Hz.","price_listed":0.02,"price_asked":0.02,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":1706,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:137","eip155:42161","eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"baseHz":440,"ratio":"3:2"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET"],"type":"string"},"queryParams":{"properties":{"baseHz":{"description":"Optional starting frequency in Hz to apply the interval to","type":"number"},"cents":{"description":"Interval size in cents (1200 per octave)","type":"number"},"ratio":{"description":"Frequency ratio such as 3:2, 5/4 or 1.5 (use this, or cents)","type":"string"}},"required":[],"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"properties":{"asOf":{"type":["null","string"]},"baseHz":{"type":["null","number"]},"cents":{"type":["null","number"]},"centsFromEqualTemperament":{"type":["null","number"]},"degraded":{"type":["boolean","null"]},"disclaimer":{"type":["null","string"]},"intervalName":{"type":["null","string"]},"nearestNamedCentsAway":{"type":["null","number"]},"nearestNamedInterval":{"type":["null","string"]},"nearestNamedRatio":{"type":["null","string"]},"nearestSemitones":{"type":["null","number"]},"notChecked":{"items":{"type":"string"},"type":["array","null"]},"octaveReducedCents":{"type":["null","number"]},"octaves":{"type":["null","number"]},"ratio":{"type":["null","number"]},"reasons":{"items":{"type":"string"},"type":["array","null"]},"resultHz":{"type":["null","number"]},"semitones":{"type":["null","number"]},"simpleFraction":{"type":["null","string"]},"source":{"type":["null","string"]},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]}},"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-10-21","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.02,"price_match":true,"latency_ms":1706,"error":null}],"description_full":"Convert a frequency ratio (3:2) to cents and semitones or back, name just and Pythagorean intervals and commas, apply to Hz.","last_updated":"2026-10-20T20:58:34.315Z","schemes":["exact"]}