how are the notes on a steam whistle set-up for say a six-chime whistle or a four chime whistle? Are chords used like a G chord or anything like that? Is each note in a six-chime whistle go up a third creating a chord with six different notes or do they go up one step like in scale? Something I've been wondering about for some time, any thoughts any one has would be apprectiated. Thanks.