# Batch Podcast Publisher Pack Normalize a batch of podcast episodes, apply metadata and chapters, and package validated delivery files in one ZIP. > Canonical page: https://elysiatools.com/en/tools/audio-batch-podcast-publisher-pack - **Category:** Media - **Keywords:** podcast, publisher, batch, delivery, lufs, chapters, metadata, zip, ffmpeg ## Overview Upload up to 20 audio files or one ZIP archive. Each episode is decoded and normalized with FFmpeg, tagged with show metadata and optional chapters, checked for decodability, and placed in a ZIP with manifest.json. This tool does not transcribe audio or infer chapters; chapter times must be supplied as JSON. ## Inputs - **Audio Files or ZIP Archive** (file): Upload up to 20 audio files or one ZIP - **Metadata JSON** (textarea): Optional defaults and per-file metadata. Chapter times are seconds. - **Metadata JSON File** (file): Optional JSON metadata file - **Cover Artwork** (file): Optional JPG or PNG cover - **Platform Target** (select) - **Integrated Loudness (LUFS)** (number) - **True Peak Ceiling (dBTP)** (number) - **Sample Rate** (select) - **Output Format** (select) - **Bitrate (kbps)** (number) - **Trim Leading/Trailing Silence** (checkbox) ## When to use - Prepare multiple podcast episodes for a release or delivery batch. - Apply consistent loudness, true peak, sample rate, format, and bitrate settings. - Add show metadata, cover artwork, and chapter times supplied in JSON before packaging. ## How it works - Upload up to 20 audio files or one ZIP archive containing the episodes. - Optionally provide metadata as JSON text or an uploaded JSON file, including chapter times in seconds. - Choose the platform target, loudness and true peak settings, sample rate, output format, bitrate, and optional silence trimming. - The tool processes and checks each episode, then returns a ZIP containing the output files and manifest.json. ## Use cases - Podcast teams can prepare a multi-episode release with consistent loudness and file settings. - Independent creators can add show details, episode titles, chapters, and optional cover artwork before delivery. - Audio publishers can convert source recordings into MP3, M4A, or WAV batches and receive one organized ZIP. ## Frequently asked questions ### How many audio files can I upload? You can upload up to 20 audio files or one ZIP archive. ### Which output formats are available? The available formats are MP3, M4A with AAC, and WAV with PCM. ### Can the tool create chapters automatically? No. Chapter times and titles must be supplied in the metadata JSON. ### Can I add podcast metadata? Yes. You can provide show and episode metadata through JSON text or a JSON metadata file. ### What does the downloaded result contain? 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