for instance Arduino, you would need atleast 6 I/O pins to talk to the LCD. However, if you use an LCD module with I2C interface, you only need 2 lines to process the display information. Now a days, ...

Inside the radio there is an Arduino Mega controlling ... and a PT2314 audio processor. For display there is a set of retro LED seven-segment modules, and an MSGEQ7 spectrum analyser.