he valve under the pipe in the chest, which admits air into the pipe, causing it to speak when the key is depressed. With Mechanical Action the pallet is opened by a rod or tracker connected to the key, and feeds air into a channel supplying all pipes of the corresponding note on that chest. With DIRECT-ELECTRIC™ Action it is opened by an electromagnet when the key is depressed, and there is a separate pallet for every pipe, assuring an adequate supply of wind to each pipe no matter how many are played at once.