Mic and Music Audio output problem
 

Recently I noticed when I sing in my mic the music volume output is reduced.

I am hooked up using a mic on a Kareoke machine that also receives my music from computer and sends it to VCR which then sends all to Receiver.

Again, it seems like this just started about 3 weeks ago and I have been set up this way for about 8 months.

Appreciate advice. Thank you!!

Sbyron