Hi, I used Smartripper 2.41, Flashmeg 0.6, then Nero 220.127.116.11 to copy DVD Karaoke. I updated my Pioneer DVR A03 firmware to become a RPC-1. After those steps process Nero burnt successfully. When I played it in my Sony DVD-S500D I can only hear the vocal singing. I can't turn this off. Note that when i ripped the DVD, I selected all files from the original DVD, such as *.ifo, *.buf, and *.vob. Please help.