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Scale Changer Harmoniums

A scale changer harmonium is a professional harmonium that allows you to adjust the pitch of the notes while still playing from the same position. For example, if you've learned a song starting from a particular key, but it’s now too high or too low for you, you can change the scale.

The scale changer enables you to shift the pitch by one or two scales down, but you still play from the same key. Professional musicians use scale-changer harmoniums to adjust the pitch of the notes while singing/performing. So that without retuning the instrument they could produce different pitches.

For instance, in a 9-scale changer harmonium. It has nine positions, with four forward and four backward adjustments. If you're playing on C sharp, you can move four scales higher or four scales lower. Similarly, a 13-scale changer has 13 positions, and this is indicated on the harmonium. To adjust it, simply press down, and the keyboard will shift to the desired position for playing.

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