英文關鍵字
music
vu
meter
volume
db
level
analog
indicator
arrow
sound
audio
control
electronic
studio
equipment
stereo
needle
vintage
dial
amplifier
scale
technology
peak
amplify
display
black
measuring
amp
close
yellow
retro
maximum
oldfashioned
loud
pointer
play
output
record
noise
movement
measurement
espionage
graduation
value
information
voltage