Yamaha P-37E - Lucy421
Yamaha image of the keypad strip, an innovation of which in the P-37E is the differentiation of the size and shape of the holes through which air is released. The bass end holes are shown on the right. On the P-37D, all holes are of that same shape and size. It seems that one effect is muting and another is the requirement of more air pressure at the high end.

Yamaha image of the keypad strip, an innovation of which in the P-37E is the differentiation of the size and shape of the holes through which air is released. The bass end holes are shown on the right. On the P-37D, all holes are of that same shape and size. It seems that one effect is muting and another is the requirement of more air pressure at the high end.

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