{"slug":"medien-halowerk-com-v1-pitch-shift-ffd71cbb","name":"medien.halowerk.com/v1/pitch-shift","summary":"Takes an audio or video file and transposes it by a number of semitones from -12 to +12 while keeping tempo and running time, using the Rubber Band library through ffmpeg. With preserve_formants on, voices keep their natural timbre instead of sounding like cartoon characters — useful for practice tracks in another key or light voice anonymisation. Pitch-shifting is not a secure anonymisation: it can often be reversed, and the answer says so.","status":"live","headings":[{"slug":"video-audio","title":"Video, audio & speech"}],"indexable":true,"listed_since":"2026-10-30T18:50:16.933262Z","sources":[{"source":"x402_bazaar","external_id":"https://medien.halowerk.com/v1/pitch-shift","owner_address":"0x2880edfff13100677bf97a3cbdf3bc34771c4e5e","seen_at":"2026-11-12T10:24:53.759045Z","removed_at":null}],"endpoints":[{"url":"https://medien.halowerk.com/v1/pitch-shift","host":"medien.halowerk.com","protocol":"x402","state":"live","last_probe_at":"2026-11-12T19:36:16.098462Z","last_ok_at":"2026-11-12T19:36:16.098462Z","tools_count":null,"tools_changed_at":null,"uptime_24h":1.0,"uptime_30d":1.0}],"also_listed_as":[{"slug":"medien-halowerk-com-0df1eebb","name":"medien.halowerk.com"}],"payment_options":[{"endpoint_url":"https://medien.halowerk.com/v1/pitch-shift","network":"eip155:8453","scheme":"exact","rail":"exact","asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","coin":"USDC","asset_label":"USD Coin","amount":"3000","pay_to":"0x2880edfff13100677bf97a3cbdf3bc34771c4e5e","observed_at":"2026-11-12T19:36:16.098462Z"}],"usage":{"source":"x402_bazaar","unique_payers_30d":1,"paid_calls_30d":1,"last_paid_at":"2026-10-30T13:54:33.978Z","reported_at":"2026-11-12T10:24:53.759045Z"},"assessment":{"method":"2026.11.4","checks":[{"id":"answers","state":"pass","reason":"Answered a check within the last hour."},{"id":"owner","state":"fail","reason":"No one has proven control of its domain or of the wallet it is paid at."},{"id":"track_record","state":"fail","reason":"Listed for 12 days; 30 are needed."},{"id":"real_customers","state":"fail","reason":"1 different wallets paid it in 30 days, as the x402 Bazaar reports (not yet counted by addrbook); 10 are needed."},{"id":"clean_scan","state":"not_applicable","reason":"Not an MCP server."}],"passed":1,"applicable":4,"contradicted":false,"computed_at":"2026-11-12T00:28:27.663781Z"},"identity":{"endpoint_domains":["halowerk.com"],"proven_domains":[],"proven_wallets":[],"namesakes":[],"namesake_count":0,"identity_checks":[],"wallet_attestations":[],"human_backings":[]},"replies":[],"customers":null,"scan":null,"notice":"Not affiliated with addrbook — claim or request removal."}