Abstract: A kind of timbre model based on sad-type instrument is presented，which can provide the sound basis for emotion-based algorithmic composition.Musical sound samples of the instrument are collected.This instrument is good at expressing sad emotions.And spectral and envelope characteristics are obtained by discrete Fourier transform and analysis calculation method of the instrument waveform.Finally，a kind of timbre model based on sad-type instrument is constructed.Experimental results show the sad-type sound generated by the model and the model itself are well regulated.Compared with the traditional form of recording，this method is of low cost，flexibility，and also plays an important role in promoting the development of computer music technology and the emotional arithmetic composition.

摘要： 提出了一种悲伤型乐器的音色模型，为基于情感的算法作曲提供音响基础。采集擅长表达悲伤情感的乐器的乐音样本，利用离散傅里叶变换获取频谱特征，通过对乐器波形的分析计算获取包络特性，最终构建了一种悲伤型乐器的音色模型。通过实验验证了由该模型产生的悲伤型音色及模型本身具有良好的可调节性。与传统的录制形式相比，该方法成本低，灵活性强，对计算机音乐技术的发展和算法作曲的情感化也起着重要的推动作用。