Echoes - Pink Floyd -

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

The song's signature opening was born from a happy accident. Keyboardist Richard Wright played a single high note on a grand piano that was accidentally fed back through a . This created the famous "underwater" sonar sound that defines the track's intro. 3. Collaborative Writing Echoes - Pink Floyd

"Echoes" was the first song in years that all four band members—David Gilmour, Roger Waters, Richard Wright, and Nick Mason—wrote together as a true group effort. It served as a bridge toward their later sound, with David Gilmour noting it showed the direction they would take with The Dark Side of the Moon . 4. Structural Highlights : The eerie, screaming sounds in the middle