卡农 音乐程序，用matlab编写的，根据蜂鸣器的频率发音，可以自己再编写其他曲目-Canon music program, written using matlab pronunciation buzzer frequency you can re-write other tracks

检测蜂鸣器焊点是否存在明显裂纹，是否符合加工后的要求。-Detecting whether there is obvious crack buzzer pad, whether to meet the requirements after processing.