One of my brother's spawn was involved in piping competitions some years ago.
She played a drum of some sort, snare I think.
Anyways, before the start of the competition, each band would form in a circle, and the pipers would blaw to inflate the bag and let the drone pipes do their monotonic thing. ( The tune comes from the chanter pipe.) The boss man would go around with a digital bagpipe-tuner (yes!) which he would hold onto the top of each drone-pipe, and then twiddle the length-adjuster so it was emitting the exact right frequency of drone.