英文關鍵字
music
vu
meter
volume
level
analog
sound
audio
control
electronic
indicator
studio
arrow
equipment
stereo
db
needle
vintage
dial
amplifier
scale
technology
peak
amplify
display
measuring
amp
signal
closeup
tape
reel
measure
number
horizontal
hi
power
graduation
unit
speech
move
70s
loud
entertainment
retro
noise
broadcasting