Speaking to The Daily Telegraph, Geldof said that his success in fundraising and charity work has meant that his former music career has been overshadowed.
He explained: "I have every opportunity to speak my mind. If I want to write about economics, I can write for the [Financial Times] or The Daily Telegraph. I have done!
"If I want to make a speech about debt reduction, I can make a speech to world leaders. If I want to get on Newsnight and talk about global poverty, I'll be on. What I'm not allowed to do is sing my heart. And that's something everyone needs sometimes.
"My thing was... have hits, talk about things that were important, change it. But what somehow got lost was the music. Playing live, without any question, is my greatest pleasure."