Creating Audio CD resulted in 20mins of static/white noise as Track 1?

I’ve attempted (twice!) to create this Mixed Mode CD (data + audio), it writes fine. The audio is being converted from MP3.

However on playback of the audio CD the first track is 20 minutes of white noise? The remaining two tracks are normal.

What am I doing wrong?

Using Nero

Ok from reading the manual I should have used the ‘CD Extra’ mode as that makes the data track invisible to regular CD players.

Quite why they don’t use this mode as default is a little odd.