先告訴你dBFS是dB Full Scale,專門適用於digital audio measurement(to show the dynamic between LSB(Less Signal Bit) TO MSB( Max Signal Bit),VU是Volume Unit,由字面應不難理解,....先告訴我你是否姓姚,randy from Randy Rhodes,我再告訴你decibell怎麼從bell變小成decibell,or dBu,dBa,dBm.....!!O.K. ?