I was given a CD that had no slip case. The printing on the CD is as follows: The Opera Collection. The sopranos. DUET Music. DUETCD 075. I want to know who sings what track as it is not shown . The Daily Telegraph may have given them away. I can find no web site for Duet Music.
Can't you just put it into your PC and use the various media players available to gather the info (Windows Media Player, Real Player etc)?
Just click on the 'Get Info' tab and you ought to get the info you require.