Lahore Flute 11 Scale ChangerDescription: Lahore Flute Scale Changer includes 11 scales. Scale changer is also an easy harmonium with the difference that the keys are not settled over the reed board. The keys are preferably mounted on an adjustable plate which slides sideways making one key placeable on another note. The reed board (hidden under the keys) is the plate on which the keys are fixed and has different holes that are covered using reeds.