Yes, that method is very smart. I did the same before upgrading. And also for NXDN.Thanks for the responses. I actually didn't mean "encrypted," I really meant to say whether I would be able to hear the "digital static" using whatever modulation that might tell me if DMR is being used. I would assume that if I can "hear" a voice transmission on any of these frequencies it's not DMR.
To confirm, you won't be able to hear the difference between an encrypted and non-encrypted raw DMR data stream...same goes for NXDN.If you are simply playing a DMR frequency as plain analog FM demodulation, you will hear the "digital buzz" of the data stream. While there might be some sort of small variation a trained ear might be able to detect between encrypted and open, I think it's going to sound pretty much the same.
Encryption doesn't seem to be that prevalent with DMR.