So you emerge blinking into the light around the end of 2007, early 2008, playing sharp, clever-clever East Coast pop with inflections of world music, a touch of Peter Gabriel. Everything goes just swell. Then you’re back in late 2009, early 2010, ready to consolidate vast critical and sturdy popular acclaim with a second album. Triumph is assured, right?

But what if you’re not Vampire Weekend? What if you’re Yeasayer? The answer seems to be to mainstream it up a bit more, move your world music closer to the US borders. Reggae! ‘Ambling Alp’ is a cosily appealing song, a grower and a fashion-free standalone. It also has Junior in paroxysms of giggles, which may or may not be a guarantee of success.

Yea or nay?