After the wiring update, the Note-Block along with alot of other blocks, got added a input. When a signal goes in that block, it triggers the block. same goes with the Note-Block. When a signal goes into the Note-Block, the note plays.
So what if there was a reversed version. intead of the Note-Block having a input, it has an output. Meaning, when a player or a item triggers the Note-Block, the Note-Block sends a signal.
For those who dont know, a block with a little indent is an input. And a block with a tiny bump is an output. The default Note block has a indent/Input.
