MIDI 音樂的優點在於檔案小，在手持式裝置或儲存空間有限的裝置
上，可以存放大量的MIDI 音樂檔案。而由於軟體開發的便利性，MIDI音樂已經可以使用精確複雜的演算法來合成，且以軟體設計的音色合成器之擴充性也較硬體來的容易方便，其對於新的MIDI 音色，我們可藉由修改演算法，或將新的音色加入資料庫即可，不受限於硬體設計。
本論文主要的研究是以軟體音源合成的MIDI 音樂播放器，並根據系
統晶片(SoC)中ARM 與數位訊號處理器(DSP)的硬體，探討如何使兩者溝通以達到即時MIDI 解碼、合成、及播放聲音的實現方法。同時，本研究亦於電腦上架構一簡易卡拉OK 歌唱系統，並擷取MIDI 音樂的主旋律音符資訊，配合音高與速度調整演算法，校正聲音作為發展智慧型聲音調整的歌唱系統。

Because MIDI is a compact data format to represent the music, we can store a lot of MIDI files in hand-held devices or the devices with limited memory. With the convenience of software realization, we can precisely synthesize music by using complex algorithm. We also can easily modify the algorithms or add new timbres to database. Unlike the synthesizer designed in hardware, the extension of synthesizer designed in software is much easier for creation of new MIDI music.
The research of this thesis focuses on the implementation of MIDI player with software synthesizer. We discuss the issue of communication between ARM core and DSP chip designed in system-on-a-chip (SoC) to realize real-time decoding, synthesizing, and playing of MIDI files. Furthermore, we also build a simple karaoke system, which can catch the notes information of the melody line. Combined with pitch and speed control algorithms, we hope to develop an intelligent singing system which can automatically correct the erroneous sound of a singer.

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