用qt做的波形显示,只是一个示例，显示的是一个正弦波，有刻度表示，如果有人需要，可以增加功能-Qt to do with the waveform display, but one example, shows a sine wave, with scale indicated that, if someone needs, can increase the function

Decoding the signal from magnetic stripe card or ticket using just a simple magnetic head connected to a microphone jack. Recording an audio WAVE file, and then this information can be decoded by the 2 programs included. First program dab.c deco

本程序是用Qt做的显示三种基本波形的Demo。 三角波，方波，正弦波。可以启动和停止，能改变幅值和偏移量。-This procedure is to do with Qt, the Demo show the three basic waveform. Triangle wave, square wave, sine wave. You can start and stop, change the amplitude and offset.