Can you sell Blankie sound packs?

Yes. You can sell your own Blankie sound packs. Really. The only catch is that an exported .blankie preset bundles any custom sounds into the file, so selling a pack also means selling those recordings and each recording's license still applies.

Before you charge for a pack, make sure every sound in it allows commercial use or get permission from the person who made it. If you're still fuzzy on what a license is or what common labels mean, read our guide "Common Sound Licenses, Explained".

What you can use in presets you sell

• Sounds you made or recorded yourself are covered by your own copyright. You'll have no issues here as long as your recordings don't contain someone else's copyrighted works (i.e. a song on the radio, or audio from a movie or video game).
• CC0 and public domain licensed works are another safe pick. With these, the creator has explicitly stated they do not require any credit to use it and permit unlimited commercial use.
• Attribution (CC BY) also works, as long as appropriate credit travels with the pack. That means more than a name: pass along whatever the creator supplied, such as their name and any other parties to credit, a link to the original, the license and a link to it, and any copyright or disclaimer notice (licenses older than version 4.0 also want the title). Fill it into the Credits fields for each sound in Blankie, and repeat it wherever you post your listing.
• Attribution-ShareAlike (CC BY-SA) and Attribution-NoDerivatives (CC BY-ND) are less common, but both still let you sell with credit. The catch is that any derivative/remix work (e.g. a music video or a one-hour soundscape) you make with a CC BY-SA sound has to be released under that same open license, and a CC BY-ND sound has to be bundled exactly as it was published (no trimming or remixing). As we understand it, a Blankie sound pack doesn't constitute a derivative work on its own (it bundles existing sounds rather than transforming them into a new recording). When in doubt, you can always reach out to the original creator.

What you shouldn't use in presets you sell

• Works licensed for "noncommercial use". A CC BY-NC sound can't be used in monetized packs because noncommercial means not for sale. You'll need something else for a pack you'd charge for. Also, "NC" can also stack on top of another license, like CC BY-NC-SA or CC BY-NC-ND. Just know that if you spot NC anywhere in the license, that sound is off the table for anything you sell.
• Someone else's copyrighted audio you don't have a license for. Pretty straightforward here. Just because you found something free online doesn't mean you have a right to repackage it in a .blankie preset and sell it. Even if you bought a copy of the song you wanted to include or you owned a copy of the game or movie the sound comes from, that doesn't automatically grant you permission to resell it.
• Content from most "stock" sites. Paid or free, many stock video/audio/image sites license sounds for use inside your own content, not for resale or redistribution on their own. Even Pixabay, which lets you use content for free with no attribution, says it pretty plainly in their license terms: "You cannot sell or distribute Content (either in digital or physical form) on a Standalone basis," where standalone means content "where no creative effort has been applied to the Content and it remains in substantially the same form as it exists on our website."

Other considerations

• Fair use doesn't really stretch to selling a sound pack. It's a narrow legal defense for things like commentary, criticism or parody, and it leans on the use being transformative and usually noncommercial. Repackaging a recording and charging for it is neither, so don't count on it to cover a sale.

• Royalty-free is a label worth reading carefully, since it doesn't mean free or unrestricted. Similarly, terms like "copyright-free" and "no copyright" are marketing, not licenses. Almost every recording is under copyright the moment it's made, so make sure to read the actual license terms that cover the content you want to use. Most royalty-free licenses typically mean you won't owe per-use royalties to the creator, allowing you to use a song/sound inside a finished work like a podcast or a video, but not resell or redistribute the bare audio file on its own. A .blankie pack would essentially redistribute that bare file, so check the terms before you bundle one in.

• A license can only be granted by the creator. Just because something says "public domain" or "Creative Commons" doesn't mean the person who uploaded it actually owns it. A license from someone who doesn't hold the rights isn't worth anything. Use some common sense. A "free" upload of a popular song, a movie clip or a recognizable voice should be a red flag. Even a sound that "samples" something copyrighted isn't something you can distribute legally without permission. Even an honest field recording can catch copyrighted audio in the background. Be careful and make good decisions.

Ultimately, the cleanest and easiest way to handle licensing is to just use audio you own the rights to. Record your own sounds and every license question disappears.