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
working
science
device
moving
aged
old
energy
sync
panel
recorder
dynamic
maximum
metrical
closeup
silver
output
decibel
reel
listening
input