hd ratio speaker background

1970s 1980s analog analysis aspect audio background blue circle circles concentric defintion design disco discotheque electricity electronic element elements energy entertainment frequency funky glow glowing green high loudspeaker modulated modulation music oscilloscope pink pop purple ratio record retro ripple rippled ripples rock scrapbook scrapbooking sine sinusiodal song sound sounds soundtrack speaker style stylised tech techno technology track vibrations volume wave waveform waves