以TI DSP 實作之即時樂器音效處理系統

A Real-Time Instrumental Sound Processing System Based on TI DSP

林嘉欣(Jia-Sin Lin)

指導教授 ： 王佳盈

中原大學/工學院/電機工程研究所/碩士(2012年)

https://doi.org/10.6840/cycu201200423

摘要

音效合成器是鍵盤類玩家的好幫手，可以讓人演奏出各式各樣的音色和效果。然而傳統樂器如吉他等，雖然非常普及，卻無法享用這些設備，來演奏出如此變化多端的音效。本論文利用TI DSP C6713DSK板，設計了一個即時的樂器音效處理系統，以電吉他作為音源輸入，透過各種訊號分析和處理，分析所彈奏的各種音符，然後使用一些音樂合成效果，來加以變化和撥放。透過這個系統，我們可以即時產生各種音色和效果。除了基本的音符檢測，我們也針對和絃的部份，設計了簡單的偵測方法，使其應用更為寬廣。

關鍵字

吉他辨識 ； 音樂辨識 ； 即時樂器辨識

並列摘要

A sound synthesizer is a convenient tool for a keyboard player to play a variety of musical sounds and effects. However, traditional musical instruments such as guitar, although very popular, cannot access these devices to play such a great variety of sound effects. In this thesis, we use the TI DSP C6713 DSK board to develop a real-time music sound processing system. An electric guitar is used as the input source. By using signal analysis and processing, the playing notes are detected and then are synthesized according to our requirements. In addition to the basic note detection, for the chord part, we also design a simple detection method. Through this system, we can immediately produce a variety of sounds and effects with an electric guitar.

並列關鍵字

real music recognition ； music recognition ； guitar recognition

參考文獻

[4] “Robert Moog (Photograph),”

http://en.wikipedia.org/wiki/Piano_key_frequencies, June 20, 2012.

[15] “Frequency modulation synthesis,”

http://en.wikipedia.org/wiki/Frequency_modulation_synthesis, April 28, 2012.

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