A lost audio recording of Led Zeppelin performing “Dazed and Confused” live in 1969 is making the rounds on the Internet.

The 13-minute clip was reportedly recorded by a fan directly from their TV speakers during a broadcast of the song on a Dutch television show.

A review of the show in an early issue of Top Pop Stars magazine said, “The concert hall was packed, TV cameras were everywhere and the atmosphere crackled. Heavy, crashing Zeppelin sounds swept the audience onto another plain and the timing of their applause indicated their appreciation of the material. Wild, standing ovations brought the group back time and time again and they finally left the stage exhausted.”