I was told later, and also by lots of singers who were involved in this, that they sometimes recorded 50 or 60 different takes until they got just the right take -- they uploaded it.
Scoprii più avanti, anche tramite molti cantanti coinvolti nel progetto, che a volte registravano anche 50 o 60 volte fino a che ottenevano il risultato perfetto e lo caricavano.