I have installed ML on my 500d, recording video has no audio. Is there any way to make it record with sound?
Yes.
General question -> general answer.
http://www.catb.org/~esr/faqs/smart-questions.html#beprecise
Could you share with me how to do this?
Yes!
http://www.catb.org/~esr/faqs/smart-questions.html#beprecise
https://www.chiark.greenend.org.uk/~sgtatham/bugs.html