Denon 1312 AVR - Audio directing to TV speakers instead of AVR speakers

Please can someone advise on the below problem.

I have connected the HDMI out of the cable set-top box to SAT/CBL HDMI port in the AVR and then connected another HDMI cable from 'MoNITOR' OUT port of the AVR to the HDMI port in TV.

Problem is both video and audo signals being are directed to TV, hence no sound from the AVR speakers.

I believe there should be a setting in the AVR somewhere to direct the audio to AVR speakers, but I can't seem to find it!

Thanks in advance.

Found it! The setting is under 'Other Setup'. Thanks alot !!!