Meaning of "DD" in filename

[McNik]

Hey people, I am new to guitar, Rocksmith and CustomForge.
While downloading a few songs I noticed that some had two versions (identical version numbers) where one of them had a "DD" in the filename?
Whats the difference to the other version?

PS: Searched for roughly 15 minutes but couldn't find an answer. Please excuse me if this question has already been answered in a faq or in a similar post.

 

[Guest]

DD means Dynamic Difficulty, and NDD means No Dynamic Difficulty. DD lets the song be playable by beginners, as well as fixing a lot of bugs. ALWAYS get the DD version of a song if possible. DD should be included in every song made in 2017 and later.

[McNik]

Thanks! Luckily I always downloaded those ^^