{"name":"audio-loudnorm","description":"Normalize audio loudness to a target LUFS level for podcasts, YouTube, and Spotify delivery. Send an audio_url plus an optional target_lufs (defaults to -16) and true_peak, and it probes duration, runs two-pass EBU R128 loudness normalization, and returns a hosted MP3 URL with the applied target and duration in seconds. Common presets: -23 for broadcast, -16 for podcasts, -14 for streaming platforms. Use it as a loudness normalizer, LUFS correction API, or audio mastering step before publishing.","price":"$0.02","method":"POST","input_schema":{"properties":{"audio_url":{"type":"string","description":"URL of the audio file to normalize. Rejected if longer than 60 minutes."},"target_lufs":{"type":"number","description":"Default -16. Range -30 to -10."},"true_peak":{"type":"number","description":"Default -1.5. Range -9 to 0."}},"required":["audio_url"]},"input_example":{"audio_url":"https://download.samplelib.com/mp3/sample-3s.mp3","target_lufs":-16},"output_example":{"audio_url":"https://...mp3","duration_seconds":120,"target_lufs":-16},"x402_payment_required":true,"x402_facilitator":"https://api.cdp.coinbase.com/platform/v2/x402"}