I have an automatic sorting system that uses minecarts and dispensers which is giving me a headache. I tried putting the carpet block on top of it (treating it like a note block) to see if it would muffle it. Nothing. I'm wondering if there is a command I could use to quiet it.
21 Answer
I do not believe there is a command that muffles noise. However, you could use comparators to only fire when the dispenser has an item in it.
dispenser > comparator > redstone wire (1) > repeater(1-tick) > wire > dispenser
This will cause the dispenser to fire only when it has an item in it. Note that this method will not work if you have more than one hopper flowing into the dispenser as it will fill faster than it fires, and the comparator will provide a constant signal, stopping item flow.
