# Audio Podcast Loudness Compliance Report Compare integrated LUFS, true peak, LRA, stereo/mono, bitrate and sample rate against Apple Podcasts, Spotify, YouTube, ACX and broadcast targets. > Canonical page: https://elysiatools.com/en/tools/audio-podcast-loudness-compliance-report - **Category:** Media - **Keywords:** audio, loudness, lufs, true peak, podcast, compliance, spotify, acx ## Overview Measures EBU R128 loudness with FFmpeg loudnorm, probes the container with ffprobe, and judges compliance against six common delivery targets. ## Inputs - **Audio File** (file): Select a podcast episode / audio file - **Platforms to check** (select) ## When to use - Before publishing a podcast episode to ensure it meets the loudness targets of Spotify, Apple Podcasts, and YouTube. - Prior to submitting an audiobook to ACX (Audible) to verify compliance with their strict LUFS and true peak limits. - During post-production to check if your master audio file aligns with EBU R128 broadcast standards or AES streaming guidelines. ## How it works - Upload your audio file, such as an MP3 or WAV podcast episode. - Select the target platforms you want to check against, such as Spotify, Apple Podcasts, or ACX. - The tool runs FFmpeg loudnorm and ffprobe to extract loudness metrics, channel configuration, and container metadata. - A detailed JSON report is generated, highlighting compliance status for each selected platform's specifications. ## Use cases - Verifying podcast master files against Spotify and Apple Podcasts loudness targets to prevent automatic platform normalization. - Checking audiobook chapters for ACX compliance to avoid rejection during the Audible submission process. - Auditing broadcast audio files to ensure they meet EBU R128 standards for television and radio transmission. ## Frequently asked questions ### What loudness standards does this tool check against? It checks against Apple Podcasts, Spotify, YouTube, ACX (Audible), Broadcast (EBU R128), and AES Streaming targets. ### Which audio metrics are analyzed in the report? The tool measures integrated LUFS, true peak, loudness range (LRA), stereo/mono configuration, bitrate, and sample rate. ### What technology is used to analyze the audio files? It uses FFmpeg's loudnorm filter for EBU R128 loudness measurement and ffprobe for container metadata analysis. ### Can I check compliance for only one specific platform like ACX? Yes, you can select individual platforms or check all of them simultaneously using the platform selection option. ### What file formats are supported? The tool supports standard audio file formats, including MP3 and WAV, up to the file size limit. ## Related tools - [Audio Bitcrusher](https://elysiatools.com/en/tools/audio-bitcrusher): Reduce the sample rate and bit depth for a lo-fi effect - [Audio Loudness LUFS Normalizer](https://elysiatools.com/en/tools/audio-loudness-lufs-normalizer): Measure integrated LUFS, true peak, and LRA, then normalize audio to Spotify, Apple Music, broadcast, or custom targets - [Podcast Chapter Marker Builder](https://elysiatools.com/en/tools/podcast-chapter-marker-builder): Build every podcast chapter format from one timecoded list: Podcasting 2.0 JSON + RSS tag, ID3v2.4 CHAP+CTOC burned into an MP3, Vorbis comments, mp4chaps, YouTube timestamps and SRT, with a per-player support matrix. - [Audio Click Removal](https://elysiatools.com/en/tools/audio-click-removal): Remove clicks and pops from vinyl recordings - [Audio Interview Level Matcher](https://elysiatools.com/en/tools/audio-interview-level-matcher): Match loudness between a host and a guest track (or any two voice takes) while preserving natural dynamics. - [Karaoke Vocal Reducer](https://elysiatools.com/en/tools/audio-karaoke-track): Attempt to remove vocals from a stereo track - [Audio Kick-Bass Phase Aligner](https://elysiatools.com/en/tools/audio-kick-bass-phase-aligner): Compare kick and bass timing/phase in the low band, report the offset and polarity, and export the corrected track with sample-accurate alignment. - [Vocal Doubler (ADT)](https://elysiatools.com/en/tools/audio-vocal-doubler): Create an artificial-double-tracking style doubled vocal with micro-delay, pitch drift, and stereo widening. ## Samples - [Copyright-Free FLAC Audio Samples](https://elysiatools.com/en/samples/flac-samples): Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music - [Copyright-Free MP3 Audio Samples](https://elysiatools.com/en/samples/mp3-samples): Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio - [Copyright-Free WAV Audio Samples](https://elysiatools.com/en/samples/wav-samples): Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music - [Copyright-Free Raw PCM Audio Samples](https://elysiatools.com/en/samples/pcm-samples): Raw PCM s16le audio samples featuring nature ambience and relaxing music for waveform, playback, and conversion workflows ## Related content - [Podcast Recording, Editing, and Delivery](https://elysiatools.com/en/hubs/podcast-recording-editing-delivery): Rescue remote voices, clean speech artifacts, shape the edit, master loudness, add show assets, and validate podcast files before delivery.