Yep. DS10 gets emotional when he hears some melancholy music.
He has sensory issues too.
When he was younger he would sob until he couldn't speak - I actually thought he was in pain and didn't know what had happened.
Eventually he would settle enough to say "It was the song. It made me sad." And then the bottom lip would go again and he'd dissolve again.
He would have got this way hearing about something sad that happened to someone else too. Hated films with sad parts.
I actually thought it was the sweetest thing.
I just comforted him but didn't fuss too much. Told him I understood, it was normal to be moved by some music, I was too sometimes, etc, etc.
I wanted to down play it because I suspected that he was more upset about being upset than the music - he is very sensitive and has trouble handling his emotions. So where my DD might watch a sad film or hear sad music and say "Ooh, that's so sad" or "I've a lump in my throat" DS couldn't handle how was feeling. He didn't really know what he was feeling. He was completely overwhelmed.
We talked about different types of people and that some are more sensitive than others and there's nothing wrong with that - it's a good thing - so when he does feel emotional he isn't overwhelmed or freaked out by those feelings.
He's now much much better at dealing with stuff like that now. He gets glassy eyed and a bit of a bottom lip wobble the very odd time but we haven't had any crying for a long long while.
He's learnt that it's ok to be sensitive so he doesn't overreact when he does experience those emotions.
Getting older helps too.