Hi Shawn,
For personal use you can us any sound files that you have the rights to, so albums you’ve purchased, website clips etc. If you want to share the content then that’s were it gets more difficult and so you have to make sure you have the rights to use the material, Creative Commons, Public Domain and own made content are normally the safest bet for that.
Looking through the Audioblocks website and their FAQ it appears that as long as you have a subscription and using the sample adds ‘Substantive Value’ to your work then yes you are allowed to use their sounds.
"Our content may be used for nearly any project, commercial or otherwise, including feature films, broadcast, commercial, industrial, educational video, print projects, multimedia, games, and the internet, so long as substantial value is added to the content. (For example, incorporating an audio clip into a commercial qualifies, while reposting our audio clip on YouTube with no modification or no visual component does not.) Once you download a file it is yours to keep and use forever, royalty-free, even if you change your subscription or cancel your account. "
“Substantial value means that you are adding to the stock file such that the completed work is no longer recognizable as the original file. Editing a stock file into a larger media project generally suffices, but minor edits such as adding text or trimming length do not. However, it really depends on the original file itself and the nature of your edits. If you have questions about whether your edits constitute substantial value in a particular case, please contact us and include samples of your work.”
“Our content may not be: Resold or redistributed as standalone files; Used in any work which includes pornography, condones violence, or violates the privacy or publicity rights of any third party”
@Benjamin what are your thoughts on this, have I read it right?
If so then I’ll be joining up as well