"1ST Setting your voltmeter to DC and plugging it into and AC outlet will probably smoke the unit."
There will be no smoke, that will be fine if you want to try it.
"2ND Direct Current is not ever present in Alternating Current line nor visa versa."
Sorry, that's not true.
The buzz may be caused by noise on the line. A common culprit is a dimmer switch. I used to have an isolation transformer that buzzed loudly when the light in my stove hood was dimmed.
There will be no smoke, that will be fine if you want to try it.
"2ND Direct Current is not ever present in Alternating Current line nor visa versa."
Sorry, that's not true.
The buzz may be caused by noise on the line. A common culprit is a dimmer switch. I used to have an isolation transformer that buzzed loudly when the light in my stove hood was dimmed.