The concert will start at 21:30 (Chile): the difference in time from Chile to Brazil is less than an hour (so the show will begin at 22:30, at the time of Brazil).
Just one hour for the start of the show in Chile!
Important information!
The concert in Chile, according to the official website of the event, will have 1 hour and 30 minutes! In Brazil, the time that the band will have to play is 2 hours!
UPDATE!
First picture from stage of Maquinaria Festival: http://twitpic.com/2w6idu