Backing track in the vocal track

Cubase
1

Sorry for a stupid question, but I have a problem with backing tracks coming uninvitedly to a vocal track. I’ve been doing this a long time without seeing this problem and looking back to my old recordings, vocal tracks includes just my voice - but now when I try to sing along the backing it all come blended to the vocal track.

This is clearly some setting mistake - but I can’t find it.

(Cubase Artist 7.5)

Thanks in advance,
Mika

2

Too loud headphones?
Open back headphones?
Wrong routing somewhere in the software or in the audio interface or in the driver settings?

We can just guess here…

3

Disable “loopback” type functionality in your mysteriously unmentioned audio interface?

Just a guess, given the few details provided …