介绍了基于TI TMS320VC5501 DSP的吉他效果器的设计与实现。硬件方面，主要对DSP，CODEC，MCU，信号处理以及信号选通等模块电路进行了详细的分析；软件方面。主要对各种芯片的初始化和系统的工作流程进行了分析和设计。最后介绍了延迟和移相两种效果的算法。实验证明，该效果器达到了预期目标，取得了良好的数字效果。-The design and implementation of TI TMS320VC5501 DSP-based guitar effects device. Hardware, mainly for DSP, CODEC, MCU, signal processing and signal gating circuit modules such as a detailed analysis　software. The main variety of chip initialization and workflow system are analyzed and designed. Finally, the delay and phase two effects algorithms. Experiments show that the effect to achieve the desired goal, and achieved good digital effect.