Tipard All Music Converter, the best music file converter, can finish the mutual conversion between all popular music formats, including MP3, MP2, AAC, AC3, WAV, MID, RAM, OGG, etc with a few clicks. Also, you can extract audios from video files.
Program using the LPT-port for determining the speed of human reaction to the visual signal. After starting the program LEDs blink. If one of the LED flashes, the test person is trying as quickly as possible to press a button.