Rolling Stone Magazine rated Sgt. Peppers as the number one rock album of all time.  I heartily concur because no album changed the face of Rock-N-Roll more.  For the first time, Rock music was capable of being more than mere dance music -- it was to be listened to and digested.  Where the Beatles first album took 10 hours to record, this took 700 hours and 129 days.  The sound of every instrument is in some way altered:  instruments and voices are compressed, limited, and echoed.  Violins were recorded by taking headphones and using them as microphones.  Microphones were dropped down the bells of horn instruments.  Voices were played through the whirling speakers inside a Hammond organ.  This was the the first "concept album" where the songs on each side of the vinyl did not have pauses between them.  Thank you Sir George Martin!