Mankatha’s music director Yuvan Shankar Raja has said that he and the team were not satisfied with one of the tunes he had composed and therefore had to begin work right from the scratch.
The musician has said that this is the main reason for the delay in the audio launch otherwise it should have been out by now. Yuvan says that working from the beginning on a tune at this stage is very time-consuming but since the film is an Ajith starrer and he always endeavors to give the best, he does not mind setting tunes from the scratch.
Meantime..
Director Venkat Prabhu tweets on 21-07-2011 :

Mankatha master cd ready guys!! Reaching sony tomorrow!! Whatta relief!!! So very very soon it’s “Machi open da bottle” time!!
Guys total 8 tracks!! Promo song not included now!!

Mankatha’s audio, in all probability, will be released next month, we are told.