用单片机编程实现电子音乐谱曲并播放，音调、节拍都可以调节-Microcontroller Programming electronic music compose and play, pitch, tempo can be adjusted

基于PPGA的音乐播放器 可以切换三首歌曲 控制播放速度 控制音调-PPGA-based music player can switch three songs pitch control playback speed control

Only coding parameters of sound generation model • LPC is an example where parameters are a1, a2, …ak , e(n) • Music instrument parameters: pitch, loudness, timbre, …Frequency Masking: If a tone of a certain frequency and amplitude is