No, this is not going to be another trumpet bashing article, although we sometimes deserve one. The amount of warm air you exchange through your instrument can be an indication as to how well you are playing. A great way to tell if you are playing with efficiency is to check the amount of condensation coming out of your instrument. The better you play, the more condensation is generated. Why does water form in a brass instrument? Most brass instruments (the exception being the Horn- incorrectly referred to as a French horn) are equipped with a water key which is…