If you are looking for the "best of the best" within the Elektor archives, these three categories usually top the list: 1. Audio and Hi-Fi
Before digital delay pedals, Elektor published a BBD (Bucket Brigade Device) based echo. This circuit taught a generation how to use clock drivers (like the TCA350) to manipulate analog samples. It is still cloned by guitar pedal builders today. 1001 circuits elektor top