Flavor Wave’s single, “The Optimist,” arrived less like a declaration and more like someone tentatively drawing back a dusty curtain on a grey afternoon. From West Chester, PA, these five lifelong friends – Kyle Loedel (vocals, lyrics), Matthew Stretch (lead guitar), Patrick Blair (rhythm guitar), Noah Montgomery (bass), and Joshua Speaker (performer/drums) – typically tread alternative rock paths nodding to influences like The Strokes....

Before listening to a single note of Suris’ new album, “Pertinax”, I spent a few minutes just looking at the word. Pertinax. It has the distinct ring of a Stoic philosopher’s last defiant utterance or maybe a type of beetle known for its unusually stubborn shell. What a curious flag to fly for a collection of songs in an age of fleeting distraction. But...