Rapper Ab-Soul is threatening to leak his long-awaited new album online after growing fed-up with label delays.

The hip-hop star, a member of Kendrick Lamar's rap group Black Hippy, completed the follow-up to 2012's Control System in February (14), but label bosses at Top Dawg Entertainment have yet to set an official release date for the project.

The lack of progress has left Ab-Soul fuming and he reveals he is ready to just give his new music away to fans.

Venting his frustration on Twitter.com, he writes, "I'm this close to just leakin (sic) my s**t like its (sic) a mixtape..."

He isn't the only musician to threaten a rebellion against record executives - fellow rapper Azealia Banks also recently vowed to post her debut album, Broke With Expensive Taste, online for free in her longrunning battle with Universal Music Group chiefs.