'Evolusi' (Evolution) is about his feelings toward being president of the world's most populous Muslim country and one of its largest democracies.

'I urge all the children of the nation to unite, love and dedicate themselves to the country to build a better future for Indonesia,' Mr Susilo said in a statement.

The new album reprises some of the president's earlier songs, such as 'Untukmu Anak Manis' (For You Sweet Child), 'Selamat Berjuang' (Good Luck With Your Struggle) and 'Rinduku Padamu' (I Miss You), in instrumental form arranged by musician Yockie Suryo Prayono.

Liberal ex-general Yudhoyono became the country's first directly elected president in 2004 and is leading polls ahead of elections in July. -- AFP