BDS PP-131 spectrum analyser, visulation modes

BDS-PP131 spectrum analyser and visulation modes

Yamaha DSP-A5 AV Amplifier :
http://www.audioreview.com/product/am...
BDS PP-131 spectrum analyzer:
https://www.aliexpress.com/item/10050...
Yamaha NP-S303 Network Player:
https://www.hifichoice.com/content/ya...
Clock-VU spectrum analyzer:
https://www.aliexpress.com/item/10050...