{"uid":"cap_WiL11P-PFvSLgGNZhAiGB","slug":"halowerk-voice-clean-4a28e775","name":"HALOWERK Voice Clean","description":"Takes an audio or video file and returns a cleaned speech recording. A high-pass filter removes rumble and mains hum, an FFT noise reducer with continuous noise tracking lowers steady background noise such as fans, air conditioning and hiss by 10, 18 or 28 dB, a declicker removes short clicks, and the result is normalised to the target loudness in two passes.","url":"https://medien.halowerk.com/v1/voice-clean?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"mono":{"type":"boolean","default":true,"description":"Mix to one channel. Speech is almost always mono, and it halves the size."},"source":{"type":"object","properties":{"url":{"type":"string","maxLength":2048},"filename":{"type":"string","maxLength":260},"content_base64":{"type":"string","maxLength":12000000}},"description":"The recording. Either url or content_base64.","additionalProperties":false},"strength":{"enum":["light","medium","strong"],"type":"string","default":"medium"},"target_lufs":{"type":"number","default":-16,"maximum":-10,"minimum":-30},"output_format":{"enum":["opus","mp3","wav","flac"],"type":"string","default":"opus"},"duration_minutes":{"type":"integer","maximum":30,"minimum":1,"description":"Length in started minutes — this is what you are billed for."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.004","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":"$0.004/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Xq4Ezk7s4zK7E3wI8eteI","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.004","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Cleans a speech audio or video file using high-pass filtering, FFT noise reduction, declicking, and loudness normalization, returning a polished voice recording.","exampleAgentPrompt":"Can you clean up this podcast interview recording I uploaded — it has a lot of fan noise and some clicks — use medium strength noise reduction, normalize to -16 LUFS, and give me the result as an MP3? The file is at https://example.com/interview.wav and it's 12 minutes long.","exampleUseCases":[{"title":"Podcast interview background noise removal","prompt":"I have a 25-minute podcast interview at https://recordings.example.com/ep42.wav that was recorded in a noisy office — there's constant AC hum and some clicks throughout. Can you clean it up with strong noise reduction, normalize to -16 LUFS, and send me back a mono opus file?"},{"title":"Video voiceover audio cleanup","prompt":"I recorded a voiceover for my product demo video and it has some low rumble and hiss from my laptop fan. The file is at https://mycdn.example.com/voiceover.mp4 and it's 3 minutes long — can you apply light noise cleaning and normalize to -23 LUFS as a WAV file?"},{"title":"Call recording quality improvement","prompt":"I have a recorded customer support call that sounds muffled with background hiss — the base64 audio is attached, it's about 8 minutes. Can you clean it up with medium strength, normalize to -16 LUFS, output mono mp3 so I can archive it cleanly?"}],"resultDescription":"Returns a cleaned audio file in the requested format (opus, mp3, wav, or flac) with background noise reduced by 10/18/28 dB depending on strength, clicks removed, rumble and mains hum filtered out, and loudness normalized to the specified LUFS target.","failureModes":["Invalid or unreachable audio URL returns an error","Base64 payload exceeds 12 MB limit causes rejection","Duration outside 1–30 minute range is rejected","Unsupported input audio codec or container may cause processing failure","Payment failure via x402 protocol blocks the request","Target LUFS outside -30 to -10 range is rejected"],"whenToPreferThis":"Choose this endpoint when you need automated, multi-stage speech audio cleanup — combining rumble filtering, FFT steady-state noise reduction, declicking, and loudness normalization in a single API call — especially for podcast production, interview recordings, or voiceovers where consistent output loudness and background noise removal are required. It is billed per started minute of audio and paid via USDC on Base Mainnet using x402, making it suitable for agentic workflows that handle media files programmatically.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:41:28.946Z","isFirstParty":false,"canonicalSlug":"halowerk-voice-clean-4a28e775"}