simple project with 2 arduino pro mini and 2 oled for stereo audio visualized.

more details: https://forum.arduino.cc/index.php?topic=403234.0

small video sample: https://youtu.be/g6SAsMqN89U

part list:
1 pcs 3.5mm Audio Socket Jack Breakout Headphone : https://www.aliexpress.com/item/NEW-TRRS-3-5mm-Jack-Breakout-Headphone-Video-Audio-MP3-Jack-Professional-AL-Module/32825889101.html?spm=2114.search0104.3.15.91wyfR&ws_ab_test=searchweb0_0,searchweb201602_4_10152_10151_10065_10344_10068_10342_51102_10343_10340_10341_10084_10083_10304_10307_10302_10312_10313_10059_10314_10534_100031_10604_10103_10605_10594_10142,searchweb201603_6,ppcSwitch_5&algo_expid=419c352c-772b-498c-9816-45b68627476d-2&algo_pvid=419c352c-772b-498c-9816-45b68627476d&transAbTest=ae803_5&rmStoreLevelAB=5

2 pcs i2c oled screen : https://www.aliexpress.com/item/1pcs-0-96-blue-0-96-inch-OLED-module-New-128X64-OLED-LCD-LED-Display-Module/32643950109.html?spm=2114.search0104.3.15.vsnegf&ws_ab_test=searchweb0_0,searchweb201602_4_10152_10151_10065_10344_10068_10342_51102_10343_10340_10341_10084_10083_10304_10307_10302_10312_10313_10059_10314_10534_100031_10604_10103_10605_10594_10142,searchweb201603_6,ppcSwitch_5&algo_expid=25ac9613-b342-474b-a43a-aae3d70fe62c-2&algo_pvid=25ac9613-b342-474b-a43a-aae3d70fe62c&transAbTest=ae803_5&rmStoreLevelAB=5

1 pcs Micro USB Breakout Board : https://www.ebay.com/itm/Micro-USB-Breakout-Board-Adapter-to-0-1-pin-header-PCB/182860406754?hash=item2a93545fe2:g:m~0AAOSwSQFZ87rL