Something In The Air

I remember one chol ha’moed Pesach going with a rosh yeshiva and his family to a Mets game. The rosh yeshiva had a son in my class and he invited me to come along. The Mets were good back then, so there was no question of causing needless distress during yom tov! We brought our own potato chips and box drinks. There was definitely no kosher stand back then.
The vendors came around hawking their goodies, but they did not profit from us. An interesting question that arises is, may you take a deep whiff when the vendor comes around offering his hot pretzels? May one smell chametz on Pesach? Are you allowed to walk past the Entenmann’s bakery on Pesach? Would it be preferable to find another route? Did we have to get off our seats and temporarily relocate to another section while the pretzel man was there?
A seemingly unrelated question: If church bells sound a nice melody to call parishioners to prayer, may one stop and enjoy the music?
Rebbe Shimon ben Pazi says in the name of Rebbe Yehoshua ben Levi: One is not liable for me’ilah for sounds, sights, and smells (Pesachim 26a). Me’ilah is a serious offense that enjoins an individual from deriving personal benefit from consecrated property. How could one personally benefit from the sound of consecrated property? Rashi explains that potentially one could have violated me’ilah for sitting and listening to the melody emanating from the musical instruments that the Leviyim employed in their service. Those musical instruments are consecrated property. It could be argued that listening to the Leviyim’s music is tantamount to using consecrated property for personal use. However, the Gemara states that one cannot violate me’ilah by merely listening to the melodies.