本論文實現一創意無線音樂播放系統，經由藍芽傳輸手機上的歌曲到一個帶有一對羽毛，並且該對羽毛會隨音樂拍子改變擺動速度的播放裝置。本創意透過即時且穩定的音樂速度(Tempo)分析與預測下次拍子(Beat)出現時間的演算法。首先，我們使用聲音訊號的標準差來量測能量的集中程度，以加強訊號的特徵，並以簡化的梳形濾波組作為分析的基礎，來決定音樂訊號的速度，並預測下次拍子出現的位置。在不受音樂曲風的限制下，本方法能依預先設定的動作腳本產生符合拍子的控制訊號，並驅動節奏羽毛擺動。除提出的節奏還原方法，本論文亦完成，藍芽傳輸，伺服馬達，以及音樂播放模組以實現隨音樂拍子擺動羽毛之音樂播放系統。

In this thesis, we proposed a creative wireless music playing system, which transmit the music from a mobile device with Bluetooth wireless channel to the player designed with a pair of feathers, where this pair of feathers can swing according to music tempo and change the swing speed according to the music tempo. In this creative design, the stable music tempo is analyzed in real time and the beat in next moment is predicted. First, the energy standard deviation of the music signal is used to detect the concentration of signal strengthen to extract the music appearance. Then, the simplified combo filter is exploited to extract the basis of analyses, which could help to determine the tempo speed of the music signal, and predict the beat position in next moment. Regardless of music genre restriction, the realized method can harmonically drive the rhythm feathers swinging according to a pre-set action script. Except the rhythm retrieval mthod, in this thesis, the complete music playing system, including wireless Bluetooth, servo motor control, and music playing modules, could successfully realize rhythm feathers harmonically swinging with music.

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