An audio read is not a video size.

The audio check reads the duration, the codec name, the sample rate, and the channel label of the first audio stream. It stops at 150 MB. The file stays in the browser.

A video file is rejected. The size check reads pixel size and display aspect. The tag check lists eight container tags. The hash check shows a SHA-256. This note does not repeat those reads.

A missing codec, sample rate, or channel label stays blank. The check does not invent one. The read does not upload the file, change the file, or use a cloud output. An audio join is a separate job.

An audio read does not guarantee reach, approval, or a lower ad cost.