Biffy Clyro tease fans with new music

After sending out a very short email to their fans, a uproar was started. Why? Well it now looks like the band are due to drop a new track any day now. The teaser below is just 12 seconds long, but I just know something will be out soon!

You can watch a the first performance of their new song "On A Bang" below that too!

UPDATE :: They've just released a second teaser.