When the New Pornographers’ fourth album goes on sale in August, fans will have already streamed the songs on their computers and received bonus tracks that won’t be on the album, and will own a live recording from the band’s coming tour in the fall.

Matador Records, hopes that an extra dose of songs — some available now and some later, will help stem the flow of illegal copies of the new album and drum up a bit of extra revenue.

Record labels have stepped up already aggressive campaigns to lure consumers with unique downloads, bonus videos, special vinyl versions and music that hasn’t been recorded yet.

The people who go out to the record stores on the first day of a release deserve something extra,” said Paul Cardillo, who handles sales for North Carolina-based Merge Records, whose top-selling artists include Arcade Fire and Spoon. “And for those people who may be interested in a record, you want to give them a reason not to download it illegally.”

“We are being very aggressive,” said Patrick Amory, Matador’s general manager. “It seems we have to reinvent our business plan every six months, maybe even with every new release.”

In addition to trying to halt piracy, the label is doing the promotion in an effort to take advantage of the publicity a band gets before an album is released.

“At the time we are promoting the record, when the biggest buzz is going on about the record, people can’t buy it,” Amory said. “But they can often download it for free” from an illegal file-sharing site.