Hello all. I am developing a karaoke application in which user can sing with the background music with both video and audio. It is just like one popular application on the Play store StarMaker. But the thing is I am unable to find any library which can do recording and playback with live feedback of own voice in-ear, with music and voice synchronization. StarMaker is actually doing that all of that in realtime. So can anyone tell me about any library or any source from where I can develop a karaoke application?