Loudcheck MCP server

Loudcheck is a small helper that checks how loud a media file is and tells you whether it passes an official loudness standard. It is handy if you work with audio or video files that have to meet a delivery rule, like a TV show or a radio spot. Instead of reading raw numbers from a meter, you get a plain pass or fail answer.

What this MCP server does

You ask your AI to check a media file. The AI passes that request to the loudcheck helper. The helper runs a measurement on the file using ffmpeg, compares the numbers to the standard you chose, and decides if it passes or fails. Then it sends the verdict back to your AI, which shows it to you in the chat, with the numbers and a suggested fix if needed.

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What you can do with it

• Check a WAV, MP4, or MOV file against EBU R 128 or ATSC A/85
• Get a pass or fail verdict with the exact numbers and how far off they are
• See which specific measurement failed and by how much
• Get a ready-to-use ffmpeg command to fix a file that is too loud or too quiet
• Check every audio track in a video file at once
• Run a batch check on a whole folder of files
• Ask which loudness standards are available and what they require

Try asking your AI

• “Check if master.wav passes EBU R 128”
• “Is my interview.mp4 compliant with ATSC A/85?”
• “Run a loudness check on all the files in my masters folder”
• “What does the BS.1770 standard measure?”

What it gives back to you

You get a clear verdict: PASS or FAIL, or MEASURED if you chose a standard that only measures. For each measurement you see the number, the target, the allowed range, and how far off you are. If it fails, you also get a plain-English explanation and an ffmpeg command you can run to fix it.

Before you start

Who it's for

Audio engineers, video editors, podcasters, and anyone who has to deliver media files that meet a loudness standard.