Hi,
When you are selecting the license, the asset is released under this license.
So, here, and I quote the official page of the license:
You are free to:
Share — copy and redistribute the material in any medium or format for any purpose, even commercially.
Adapt — remix, transform, and build upon the material for any purpose, even commercially.
The licensor cannot revoke these freedoms as long as you follow the license terms.
Maybe, what you want is Deed - Attribution-NonCommercial-ShareAlike 4.0 International - Creative Commons.
This one would still allow people to use the license without paying you as long as they do not use it commercially (and provide credit etc).
People having already downloaded the asset still have the right to use the asset under the previous license though, theoritically.
If you just want people to listen to the samples, maybe you should not provide a license, and maybe a price as well.
Most people that don't want to use the CC system usually just write what they intend specifically in the page of the asset ("you are free to ...", "limitations:" etc).
I'm not sure of what you intended.
SoloDeveloping,