英文關鍵字
music
meter
level
analog
sound
volume
audio
vu
control
electronic
indicator
studio
arrow
equipment
stereo
db
needle
vintage
dial
amplifier
scale
technology
peak
display
measuring
signal
retro
tape
macro
classic
reading
metrical
graduation
electric
closeup
amplitude
decibel
play
nobody
60s
broadcast
pointer
electrical
player
wave