| 摘要 |
The device comprises means for disconnecting the keys, namely an element A for the A key 3 and the B natural key 2, an element B for the G key 4 and the G correspondent 6, an element C for the E 9 and D 10 keys and the F correspondent 7, an element D for the B natural 2, F correspondent 7 and F 8 keys, a means for disconnecting the low sharp key from the low C key and means for opening or closing at will the plates which are normally solid with the B, G correspondent and F correspondent keys 2, 6, 7. Application to obtaining microtones and polyphonic sounds. <IMAGE>
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