Hello,
I understand that you need to synchronize two audio files. One of them contains music to a song and the other is a vocal part.
I can do it with excellence and I would love to do it for you!
I am a certified guitar player, I have conducted am amateur choir and played in a band for 5 years. Recently, I made a very similar project to yours (audio and music synchronization). I can provide you the sample after you start chatting with me. Also, I can charge a very reasonable price of $14.
Please feel free to contact me for any details. Thank you!
Vlad