How to programmatically crossfade between songs

问题

I am working on a music player for the iPhone, and I would like to crossfade between songs. I know this is possible because My DJ does it...I can't find any documentation and don't even know where to begin on it. Can anyone give me a starting point or example code?

Thanks.

回答1:

One option is to convert both songs into raw (linear PCM) samples. Then build your own mixer function or audio unit where the mix ratio of each sample comes from a ramp or custom mix curve function. Feed the output to the RemoteIO audio unit.

回答2:

I was able to solve it by using AVPlayer instead of MPMusicPlayerController.

来源：https://stackoverflow.com/questions/8744736/how-to-programmatically-crossfade-between-songs