Cambridge CD6 sound issues

That doesn't look right at all.

If you play the tones they should sound very pure. The scope image seems almost like noise. You should see similar to what you saw with the sweep (pure sinewave) except now the frequency is constant. Try just playing them and make sure they sound OK. You can use the sweep tone as well as a reference.

(also if you play it loud enough you should be able to measure the AC voltage across the speaker. It is AC voltage remember. Most meters are fairly accurate in the 40 Hz to 1kHz range. Even 1 or 2 volts signal will sound very loud but will not damage the speakers)

Have you nothing you can play the tones on without having to keep burning them?
 
I see what you are saying and forgive my ignorance. I assumed that to scope the CD player all I had to do was play the sweep/tones through the player and get the results. I should be using the CD player as normal by playing through the system in the normal way and then scoping, I have always said that it is hard to educate an idiot🙄.
 
You should be able to directly look at the audio from the CD player but because of the last result (looking just like noise) I wanted to be sure the tones played OK audibly and that they sound totally pure in tone like a sine wave should.