Here's what I would say....
"Do you always sound like this?".......... Reply... "Only when I'm mad" said with a smile
"How do you sound when you get angry?"......... Reply........."Like a grizzly bear"
"Your voice is cute"........."Yours is not" (wouldn't do that one at work)
"Your voice is sexy"........."Just like the rest of me" (Also wouldn't so that one at work)
"You talk White"(which I'm not)....... "Really, so do you"
"Is that your REAL voice" ( no, I'm just pretending).... "Is that yours"
I have had people say weird things to me all of my life. Until about 4 years ago, I only weighted 100lbs and I'm 5'8. People would say the rudest things to me about my weight. Like, "Are you anorexic?", "You make me sick", "God, you're so skinny" (my favorite reply to that one... "And you are so NOT"), "Do you eat", "Do you have a disease that makes you skinny and is it contagious 'cause I want it" And the list goes on. Finally when I got close to 40, I gained enough weight that while still skinny not super skinny. It's a good thing. Not only can I buy clothes that fit but the older I got... the less understanding I was to rude comments.