Despite what they say about first impressions, in music it’s the second impression that can be the most important. Call it what you want, the sophomore jinx or the sophomore slump, the second album determines whether an artist can match his or her first effort or even grow beyond it. D.C.-based artist Laura Tsaggaris (suh Gair iss) must’ve spent the four years between her 2005 debut Proof and her newest record, Keep Talking, thinking…