If you start with mp3's, you need to "normalize" the volume so that all tracks have similar "loudness". You can use free software to do this. I use mp3trim found at mptrim.com .
Some software used for burning includes the "normalize" function. The function isn't perfect, but gets you much closer to what you want to do.
Some software used for burning includes the "normalize" function. The function isn't perfect, but gets you much closer to what you want to do.