To put bungs into the empty stocks to test the bag for leaks. Four corks occupy the drone and pipe chanter stocks, and the blowpipe is used to fill the bag. 2. . To put bungs into the bushes to prevent the drones from sounding. This is an imperfect method of making a bagpipe take less air, and is usually used for beginners. 3. . To apply cork to the tenons as an alternative to hemp. 4. . The state of the tenons after the application of cork, e.g. "The corking was too loose after my friend borrowed my pipe."