英文關鍵字
volume
level
meter
audio
two
arrow
round
indicator
vintage
sound
dial
analog
recording
amplify
scale
stereo
retro
vu
listening
music
classic
recorder
equipment
tape
gauge
voice
signal
display
playback
decibel
move
closeup
old
mechanic
watt
high
close
dynamic
electric
home
voltage
channel
studio
rhythm
instrument
limit
output
working