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
panel
light
dynamic
reading
aluminium
device
maximum
up
electrical
mixer
double
old
speech
dance
motion
energy
70s
loud