How to make cover art from MIDI

Why use the MIDI as the design source

The note pattern is specific to the song. Pitch becomes vertical placement, timing becomes horizontal placement, and velocity changes the opacity. Two tracks with different melodies produce different artwork even if they use the same title style.

That makes the cover useful for a demo, a beat pack, a playlist thumbnail, or a video still. It communicates that the image came from the music rather than being chosen from a stock library.

Prepare the title and subtitle

Use a short title that fits on one or two lines. A long title forces the layout to shrink the type, which weakens the cover at thumbnail size. Put the extra context in the subtitle, such as the artist name, the pack name, or a short descriptor.

The generator fits the title to the frame and wraps it only when necessary. Check the preview at a small size, not just at full resolution. A cover that reads on a phone is more useful than one that only works as a large print.

Add a background image carefully

A background image can add atmosphere, but it can also make the note pattern unreadable. EditMIDI crops the image to fill the frame and applies a dark overlay. Choose an image with a clear area or a simple texture rather than a busy scene with important details near the edges.

The image is loaded locally and is not uploaded. Use a photo you have the right to publish. The cover is a derivative of both the image and the music, so the same licensing rules apply when you distribute it.

Read the metadata in the frame

The cover includes the detected key, duration, and bar count when those values are available. The key is an estimate, not a guarantee, and a file with little pitched material may omit it. The metadata is there to give the image context, not to make a claim the notes do not support.

For a release cover, check the metadata before exporting. If the key estimate is low-confidence, remove it from the design or verify it by ear. A wrong key on a cover is a small detail that can undermine trust in the rest of the release.

Export at the right size

The download is a 1500 × 1500 PNG. That is larger than the common 1400-pixel square used by many distributors and social platforms, so it can be downscaled without losing sharpness. PNG keeps the text and note edges crisp.

If the platform requires a different size, resize the PNG in an image editor rather than taking a screenshot of the preview. The screenshot will be smaller and may include interface elements. The exported file is the clean asset.

When to take the design further

Use the generated cover as a starting point when the release needs custom typography, a logo, a collage, or a consistent visual system. The note pattern can remain the background while a designer adds the brand layer.

It is also fine to use the generated image as the final cover for a demo or a small release. The important thing is to be honest about what it is: a data-driven image made from the MIDI, not a commissioned illustration.

A cover checklist before export

Check the title at thumbnail size, confirm that the note pattern is not hidden by the background, and make sure the metadata is readable. If the image will be used on a platform with a circular crop, keep the important text away from the corners.

Export the PNG, open it in an image viewer, and compare it with the preview. If the text is clipped or the contrast is weak, change the title or background and export again. The preview is a guide, but the downloaded file is the asset that will be published.

• Read the title at thumbnail size.
• Keep important text away from circular crops.
• Open the downloaded PNG before publishing it.

What makes a cover readable

A readable cover has a clear title, enough contrast, and a pattern that does not turn into visual noise. The note grid can be dense, so the title needs space around it. If the background and the pattern both compete for attention, simplify one of them.

The strongest data-driven covers usually show a recognizable phrase rather than an entire song. A short section makes the pattern legible. If the full arrangement is too dense, trim the MIDI to the hook before generating the image.

• Give the title clear space and contrast.
• Use a recognizable phrase instead of the whole song.
• Simplify either the pattern or the background, not both.