Echoes - — Pink Floyd

: The eerie, screaming sounds in the middle section were created by David Gilmour reversing a wah-wah pedal.

"Echoes" was essentially a giant musical puzzle that Pink Floyd pieced together from 24 separate fragments. When they started recording in January 1971, they had no finished songs, so they spent studio time experimenting with random musical ideas. Here is how they "put together" the masterpiece: 1. The "Nothing" Fragments Echoes - Pink Floyd

To fit the format of their legendary film Live at Pompeii , the band "put together" a different version by splitting the song into two parts. "Part 1" opened the film and "Part 2" closed it, creating a bookend effect for the performance. : The eerie, screaming sounds in the middle

: Around the 7-minute mark, the song transitions into a repetitive, bass-driven "funk" groove. Here is how they "put together" the masterpiece: 1