it gives people a chance to peel back the layers of dust that's gathered in 40 years. it's like listening as if they're playing in the room. they were in their 20s. here in this studio, they're still in their 20s ♪ baby you can drive my car ♪ and baby i love you ♪ the benefit of -- ♪ there will be a show tonight. >> larry: everything that happens has to fit the song that happens. >> normally we build our show and the music would follow in support. now we had to work on the music. so basically what we've done, i went to london working with george martin and giles, martin's son. >> we took the masters, digitized them, brought them to vegas, and produced the music for the show in a way that we are replicating everything that was heard and wrote. what we have here on the master