It did not take more than a  minute to realize that the concert of Korn  Americans could be recorded in memory for the  worst reasons. The group of Jonathan Davis had  just arrived at the scene 20 minutes later than  planned, and interpreted  Blind , the  1994 debut self-titled album, when a sound system  failure left him speechless. 
   the band returned ten minutes later, the  adrenaline from the audience came to feel, to the  sound fails again exactly the same time of the  song. The public is impatient, the group showed  frustration, and the organization, after a long  silence, said there was a technical problem. And  behold, the group returned for the third time, and  managed, with songs like  Falling away from me  ,  Coming Undone  or  Shoots and  ladders , create yet some uproar in  assistance. Before the problems resurface in the  recreation of  One , Metallica. 
   Korn no longer returned. “Unfortunately  the concert will not continue,” heard of the  organization. They played four songs and a half  for 25 minutes. The audience whistled, a mixture  of disappointment and anger, and after the concert  hundreds of people signed the book of complaints  in the expectation of being compensated. Others  left the room. 
   In a note published on social networks, the  group apologizes to fans saying he had  “several problems with the energy on  stage.” The organization, in turn, explained  in a statement that ” it seems that the  problem was the equipment of the band “, and  added that collected complaints and that will give  them answer in the coming days. 
   the metal group of fans were in the majority  among the 56,000 people who They passed through  the room this Friday, so what happened was  remarkable. And were not the Hollywood Vampires   –  the band that was born as a  way to honor a bohemian group of the 1970s that  joined in a bar in Los Angeles, and which were  part known rock musicians, including Alice Cooper   – to achieve revive disillusioned   
   it was Alice Cooper himself the idea last  year, joining Joe Perry (Aerosmith), Matt Sorum  (ex. Guns N ‘Roses), Robert DeLeo (Stone  Temple Pilots) and actor Johnny Depp to pay  tribute to so many missing rock musicians in  recent decades – from Jim Morrison to John  Lennon, or more recently, David Bowie and Lemmy  (Motorhead). In 2015, they released an album of  versions and original, and now walk the world on  tour 
   In the front rows, the female audience longed  for Johnny Depp. – Which in recent days has  been in the news for the death of his mother and  the troubled separation of women – but this  did not turn out the views, preferring to remain  almost always discreet. The exception was when he  chose to wander around a bit with his guitar by  the side of the stage, or when it approached the  microphone to thank, even at the end of time and  show a half. 
   The attention eventually fall more Joe Perry,  for example when he tried unsuccessfully from your  guitar against the stage of the battery,  especially in voice and scenic presence of Alice  Cooper, in almost 70 years. It was he who led the  public by successive evocations – Who (  My generation ), Doors ( Break on through  ), the Beatles ( Come together ) Led  Zeppelin ( Whole lottta love ), David  Bowie ( Rebel rebel ) or Motorhead (  Ace of spades ) – powerful recreations  in a struggling concert , dominated by guitar  duels and the doubling of the rock as a cultural  matrix. But nothing more than that. 
   Before had already acted Californians Rival  Sons, that although touch originals of their four  albums end up not walk very far from what the  Vampires have to offer: reiteration of sound and  rock attitude of the 1970s, with influences from  Led Zeppelin suffused with blues environments and  many guitar solos. 
   in the antipodes of all this were the Metz  Canadians, who played on the second stage before a  few hundred people, and that gave the best concert  day. In his music there are also reminiscences  (Nirvana, Jesus Lizard, Public Image Ltd) but it  is as if they were wild and frantic projection of  that past. The Vampires formalize the rock  celebrities; Metz show that the main rock vitality  remains the possibility of anyone up to a stage,  even without great technical skills, and express  themselves without simulacra. 
   On stage, only three musicians, voice ,  guitar, bass and drums, to powerful songs, short,  dry, fast and punchy. To many, the middle, the  singer joked saying that they were like to be  there, but at the same time was a little strange  for a band like the Metz play at Rock in Rio. You  can tell that says, because in earlier stints in  Portugal had played in small spaces. But the  behavior was the same as always: distorted  guitars, rhythmic discharges, shouting into the  microphone, furious contortions and the volume to  maximum. The rock as catharsis. 
   In the context of a festival that autocelebra  (as noted with the musical that opens the main  stage), or seems to be limited to official rock  memory, Metz are proof that this can still be  burning matter. In a year of very weak poster, the  festival continues Saturday with Maroon 5 and  Ivete Sangalo or Real Estate, to finish on Sunday  with Avicii, Ariana Grande or Hinds.