I hate to ask this question in public, but I have given up trying to find the answer in my documentation.  Plus, I never had this problem until I had to reinstall my T7 last week.  My question is this?  How do I turn off the ILS freq identification morse code audio?  It is driving me crazy listening to it.  As soon as I press APP, I get it.  I have looked every where I can think of in the manuals, the FMC set up and the audio panels with no luck.  If anyone can point me in the right direction here, I would be great ful.  Thanks, Mike Nicholson 

In the bottom right corner of the Audio Control Panel is a switch to select the APP audio source. You can select L, C, R or MKR. Just to the left of that switch is a light that should NOT be illuminated if you don't want to hear the audio. If it is, click on the volume knob to the left of the light to turn off the audio. For reference the area I am talking about is labeled "9" in the illustration on page 343 of PMDG-777-FCOMv2.pdf

John, I really appreciate your answer.  I am aware of the settings you set forth above.  I guess over the years, I just got used to hearing the marker beacons and have always sort of viewed them as my safety blanket.  This was especially true in years ago, with no FMC, and the marker beacon only had blinking lights and these were not really in your direct scan during an approach.  I have not had time this morning to fly the T7 but it really seems that I had the audio light lit and would hear the marker beacons, but not the freg morse code identifiers.  My PMDG 447, 737NGX and J4100 all allow an approach with just the marker beacons sounding off.  I do thank you and am going to continue to play with this.  Mike

Try CTRL+4 or CTRL+5 if you can't get it silenced by a button in the cockpit.