英文關鍵字
amplifier
analog
audio
background
closeup
decibel
dial
display
electrical
electronic
equalizer
equipment
graph
indicator
information
input
level
light
loud
loudness
machine
macro
measurement
meter
metrical
minimum
mixer
monitoring
music
needle
peak
reading
record
recorder
retro
signal
sound
stereo
studio
tape
two
unit
value
vintage
voltage
volume
wave
yellow