Abstract: An electronic music instrument and music performance method mainly comprises the following steps: a, selecting a music score to be played in an electronic music score management unit, and selecting a played voice part and/or an automatic accompaniment voice part, the type of a music instrument, a corresponding input device, a performance music instrument, an output device and a reference voice part; b, starting an electronic music instrument performance device for playing said music score, transmitting a performance control signal to a digital music instrument unit under the control of a performance control unit to enable the digital music instrument unit to carry out corresponding performance actions or transmitting the performance control signal to a signal output unit.

Abstract: An electronic music instrument and music performance method mainly comprises the following steps: a, selecting a music score to be played in an electronic music score management unit, and selecting a played voice part and/or an automatic accompaniment voice part, the type of a music instrument, a corresponding input device, a performance music instrument, an output device and a reference voice part; b, starting an electronic music instrument performance device for playing said music score, transmitting a performance control signal to a digital music instrument unit under the control of a performance control unit to enable the digital music instrument unit to carry out corresponding performance actions or transmitting the performance control signal to a signal output unit.

Abstract: A method for producing metallic magnesium by vacuum circulating silicothermic process and apparatus thereof The method comprises the following steps: passing molten ferrosilicon (109) of 1350˜1600° C. and magnesium ore powder containing magnesia blended therein through a vacuum container (104) with a vacuum of 350˜10000 Pa periodically in a manner of circulating flow, and collecting liquid magnesium (201), i.e. the magnesium vapor released upon condensing. The apparatus comprises a heating container (101) and a vacuum container (104) connected with an elevating dip pipe (102) and a falling dip pipe (103) whose lower ends immersed into the molten ferrosilicon (109) in the heating container (101). An inert gas blowing device is inserted into the elevating dip pipe (102) wall. The method and apparatus thereof can improve productivity.