With little more than a month to go before the Sept. 18 release of Rattle That Lock, David Gilmour has now given us a sneak preview of the second single and opening cut, "5 A.M." and an unboxing video.

Based on the short clip, which can be viewed above, "5 A.M." is a moody, minor-key piece in the tradition of "Shine on You Crazy Diamond." It features the former Pink Floyd guitarist's most distinctive musical trademark, his ability to convey emotion with just a few bluesy notes from his Fender Stratocaster.

The unboxing video, which is set to "Rattle That Lock," shows the contents of the different formats in which the record will be available. Those buying it on vinyl will get a 16-page lyric book with photographs by Gilmour's wife and collaborator, Polly Samson, and Kevin Westenberg. The two-disc Deluxe edition contains two hardcover books: a 32-page expansion of the one from the vinyl edition and a copy of John Milton's Paradise Lost (Book II) -- the inspiration for "Rattle That Lock" -- a poster, a postcard, a guitar pick and a DVD with videos and documentaries.

Rattle That Lock is Gilmour's first record since 2006's On an Island. He will play a week's worth of dates in Europe next month, with shows in the United States booked for the spring of 2016. You can find all the information here.

The first single and title track, "Rattle That Lock," came out three weeks ago. For the background vocals, Gilmour used a choir comprised largely of inmates from London's Wandsworth Prison.

Watch the Unboxing Video for 'Rattle That Lock'

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