iOS how to combine user voice and curently playing audio in iphone sdk?

[rahulvyas]

Hello all, I want to create a karaoke like application.First tell me is it possible or not. How do i combine two sounds? suppose i am playing instrumental and want to record my voice so that i can create a new song using my voice:

 

[firewood]

It is possible to play and record at the same time. You can write your own sound mixer, and you do have to be very careful with latency issues and feedback. This is not simple code.