英文關鍵字
indicator
volume
music
led
audio
sound
equipment
dj
level
stereo
control
electronic
meter
light
vumeter
mixer
mixing
analog
closeup
decibel
desk
signal
broadcasting
console
lamp
green
radio
monitor
professional
peak
scale
musical
variation
unit
playing
detail
loud
bulb
flicker
producer
line
amplifier
presenter
modern
metering
recording