{"uid":"cap_5bHU2txReqf9HBLtC3wBI","slug":"halowerk-audio-loudness-normaliser-aace4052","name":"Halowerk Audio Loudness Normaliser","description":"Normalises to −14 LUFS by default, the level the streaming platforms converged on, with named presets for podcast, European and United States broadcast, or a free target. The correction runs in two passes: the first measures integrated loudness, true peak, loudness range and threshold, the second applies a constant correction derived from those figures.","url":"https://audio.halowerk.com/loudness-normalise","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"audio":{"type":"object","properties":{"url":{"type":"string","maxLength":2048,"description":"Public http(s) URL."},"content_base64":{"type":"string","maxLength":12000000,"description":"The file inline, base64."}},"description":"The recording. Either url or content_base64.","additionalProperties":false},"target":{"enum":["streaming","podcast","broadcast_eu","broadcast_us","custom"],"type":"string","default":"streaming","description":"Named target. streaming is -14 LUFS."},"target_lufs":{"type":"number","maximum":-5,"minimum":-40,"description":"Integrated loudness target, only with target=custom."},"true_peak_db":{"type":"number","maximum":0,"minimum":-9,"description":"True peak ceiling in dBTP, only with target=custom."},"output_format":{"enum":["mp3","wav","flac","opus"],"type":"string","default":"mp3","description":"Format of the normalised file."},"loudness_range_lu":{"type":"number","maximum":30,"minimum":1,"description":"Loudness range target, only with target=custom."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.008","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.008/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.008","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.008","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_aZi_tp6rjIupS8YSNA2e-","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.008","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Normalises audio loudness to a target LUFS level (default −14 LUFS) using a two-pass measurement-and-correction process, with presets for streaming, podcast, and broadcast standards.","exampleAgentPrompt":"Can you normalise the loudness of my podcast episode to −14 LUFS for streaming platforms — use the podcast preset and make sure the true peak doesn't clip?","exampleUseCases":[{"title":"Podcast episode pre-upload normalisation","prompt":"I've finished recording my podcast episode and need to normalise it to −14 LUFS using the podcast preset before I upload it to Spotify — can you run it through the loudness normaliser?"},{"title":"Music track streaming compliance","prompt":"Normalise this music track to −14 LUFS so it meets streaming platform standards — run the full two-pass correction and tell me what the measured integrated loudness was before and after."},{"title":"European broadcast loudness compliance","prompt":"I need to submit this audio file to a European broadcaster — can you normalise it to meet the EBU R128 European broadcast standard using the European broadcast preset?"}],"resultDescription":"Returns a loudness-normalised audio file along with measurements from the analysis pass: integrated loudness (LUFS), true peak level, loudness range (LU), and the constant correction gain applied. The output file conforms to the requested loudness target or preset.","failureModes":["Unsupported audio format or codec returns a format error","Audio file too short or silent to measure integrated loudness accurately","Custom LUFS target out of acceptable range returns a validation error","True peak limiting may cause distortion if source is heavily clipped","Network timeout on large audio files during two-pass processing","Payment authentication failure via x402 returns 402 error"],"whenToPreferThis":"Choose this endpoint when you need standards-compliant loudness normalisation for streaming platforms (−14 LUFS), podcast distribution, or broadcast delivery (EBU R128 European or ATSC A/85 US). It is a dedicated two-pass loudness processor that measures integrated loudness, true peak, and loudness range before applying a precise correction — superior to single-pass or peak-only normalisation. Prefer it over generic audio conversion tools when loudness compliance is the primary requirement.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T17:51:33.235Z","isFirstParty":false}