Interesting - I did a test using a number of different tracks that had all been converted to the WMA (Windows Media Audio) format.
First created a CD using Windows Media Player 8 on WinXP.
Then, created a CD using the same tracks with Nero 220.127.116.11. When I listened to the two, the Nero CD was recorded at a higher volume level, which produced distortion and clipping on some tracks. The audio CD made with WMP 8 didn’t.
Any ideas? FWIW, I don’t recall EZCD 5.1 causing this problem, and EZCD has better WMA support (both Encoding and decoding - Nero only does decoding)