Uploaded August 2022 | Updated September 2026, 3 weeks ago

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This is an old Goldline RTA circuit from 1979 that i modified and also connected to bunch of LED matrix "à la" 80' style.
The circuit is really simple and 100% analog based on the LM3915 audio bargraph chip. Each of the 1 octave band are filtered and then latch one by one to the LM3915 circuit. Nothing like the todays's alliexpress digital all integrated cheap RTA circuits... Just... Great Old analog audio!

The song playing is :
'Concrete Angel': the new vocal single by Gareth Emery featuring Christina Novelli

I like the building light RTA effect in the video of that song. It would be awsome in real life outdoor rave show!