I'm Uncle Marty, this is The 3D RadioActivity. 440 Hz serves as the audio frequency reference to calibrate acoustic equipment, to tune musical instruments, and it is the same number of times that we have entertained you with our thematic presentations, so this one is going to be unique. How special you ask? It will take more than five notes to show you that No Airedaliens … [Read more...] about Close Encounters Of The 3D Kind