Custom Sound Profiles

[obas#AC]

I have the sprint version of the optimus G and was trying to use the NFC tags. I wanted to be able to lay the phone down at work on a NFC tag and would lower the volumes. When using that feature or software it only allows me to use the sound profiles that are there which are loud, silent or vibrate. I would like to be able to create custom volumes to a sound profile. Am I over looking this feature?