Problem - Gain out of my cable box to my Processor


I'm connecting my Cable Box to a surround processor (Meridian 565) using an optical cable. The sound is very low, I have to really crank it to hear. Tried using a digital cable and have the same issue. The sound is normal if I use either of the same connections coming from my bluray. Anybody had this experience? WHAT TO DO?

Thanks
Oscar
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Nick778, My Comcast (Motorola HD DVR box) will not allow any volume adjustments.
The 565 if I remember correctly has input sensivity ajustment from 1 volt to 3 volts for every input indepently. It should be in the manual.
Thank you all for your thoughts. I did change the volume output to fixed on the Comcast (Samsung) box. Meridian does allow you to adjusts your inputs via a gain adjustment to make them all approximately the same, but this only works on the analog inputs, not on the digital or optical.
I will look into the compression adjustment, that is a new one for me.
Strangely I have to put the volume up over 3/4 on a 200 watt amp to get a barley decent sound level on regular TV.
Maybe newer equipment is set up to accommodate this?