Do I have to use Ffmpeg to make an Android karaoke app?

I'm going to make an app where I can duet with a singer. I want to play the singer's voice file and the background music file, stop the singer's voice file at every section I want, and record the user's voice. In the end, all sounds must be combined into one mp3 file. Do I have to develop and use ffmpeg to implement this function on Android? Are there any examples or related libraries?