Song ended a seven-year association with Arsenal to sign for Barca during the close season.
The 25-year-old has insisted that he is driven by an ambition to help Barcelona win back their La Liga crown from bitter rivals Real Madrid.
He told the club's official magazine: "I have come to Barca to win.
"It is a team that despite having won everything is still hungry for titles. That's why I signed. Because I always want to win and this team is on another level.
"I know the best are at Barca and I'm happy to be here because of that. I'll work hard to get to play as many games as possible."