Color music has attracted great interest in real applications. However, the mismatching problem between music and color has not been resolved. This paper proposes a novel mechanism to map the corresponding relation between music and color, which is embedded into a device with a micro-processor to play music color flashing. The proposed mechanism deduces perfect fifth relation among the wavelengths of lights and determines 12 colors corresponding to musical notes of Twelve-tone equal temperament is determined. Specifically, when a piece of music is playing, the audio signal is sampled and transformed by Fast Fourier Transform (FFT). The method can judge color corresponding to a note and research the mixed light effect of RGB LED driven by PWM outputs. Extended experiments show that the effect of music playing with matching colors flashing in real time is reached, and the color of the mixed lights can automatically match with arbitrary music being played. The paper can reveal relationships between music and color from the perspective of frequency spectrum, and promote the development of the color music, which has broad applications.

彩色音乐在实际应用中引起了极大的兴趣。然而，音乐与色彩不匹配的问题并没有得到解决。本文提出了一种新的机制来映射音乐和颜色之间的对应关系，将其嵌入到带有微处理器的设备中来播放音乐颜色闪烁。所提出的机制推导出光波长之间的完美第五关系，并确定了对应于十二音等律音符的12种颜色。具体来说，当播放一首音乐时，音频信号通过快速傅立叶变换 (FFT) 进行采样和变换。该方法可以判断音符对应的颜色，研究PWM输出驱动的RGB LED的混合光效果。扩展实验表明，达到了实时闪烁匹配颜色的音乐播放效果，并且混合灯光的颜色可以自动匹配正在播放的任意音乐。该论文可以从频谱的角度揭示音乐与色彩的关系，促进色彩音乐的发展，具有广泛的应用前景。