Formats
| Kind | Formats |
|---|---|
| Audio | MP3, M4A, AAC, WAV, FLAC, OGG (including Opus), AIFF |
| Video | WEBM, MP4, M4V, MOV, MKV |
For a video, Jam keeps only the soundtrack: the upload panel shows Extracting audio… and the video itself isn’t kept. A video without a soundtrack can’t be used.
Length
Songs can be up to 20 minutes long, on every plan. For a longer recording, trim it to the part you want to practise, or export a shorter version from your audio editor.
File size
Jam doesn’t set a separate file-size limit. Large files upload in parts, so a big WAV or video just takes longer on a slow connection.
Quality
Separation works best on clean, full-quality audio. Lossless files (WAV, FLAC, AIFF) or high-bitrate MP3 and AAC give cleaner parts than heavily compressed or re-recorded audio (how separation works).
Protected files
Files locked with copy protection (DRM), such as downloads kept inside a streaming app, can’t be read. Jam doesn’t remove copy protection.
Covers
A song’s cover can be a JPEG, PNG, WebP or GIF image of up to 20 MB. Jam crops it to a square.
If a file is refused, the message says why; an upload failed lists each one.
