windows media folder: C:\WINDOWS\Media
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马克·吐温有句名言： “历史不会重演，但常会惊人的相似。” 意思是大家都会学习 抄袭 变更调整
馬雲2017年世界物聯網無錫峰會演講
keys: b backward, f foreward, t TOC, T top, e bottom, m must watch, r random
Room Acoustics Software
ARTA for audio measurements and analysis
Visual Analyser transform PC to measurement instruments
Soundcard Oscilloscope
Use PC Soundcard as an Oscilloscope