I have a DVD-rip of a concert, which I downloaded. If I burn it separately, all is good... audio & video are great. I have an interview of this band, as well as a music video, in mpeg1, which I converted to DVD format, with TMPGEnc Xpress. I wanted to burn a DVD, with the concert, and the two converted videos. I put it together with TMPEG DVD Author. I burned it, but when I play it, the audio for the concert, is very low, while the other two videos sound fine. Any ideas why the audio for the concert, would be much lower, when I burned it the 2nd time, with the other videos? They're all the same audio & video format, and aspect ratio. Also, if I need to re-encode the concert, how can I keep the video quality (not re-encode the video), while re-encode the audio, to boost the volume? Is there a DVD authoring tool, that can boost audio for one clip, while creating the vobs? I'm very new to DVD, so I'm puzzled, and would appreciate any help... thanks!!!