The debut album from the Quad Cities instrumental ensemble The Low Down, 7 has a clearly defined sound with its jazzy funk, bright keyboards, and concisely well-spoken guitar against the busy percussion patterns. Fans of Carlos Santana’s distinctive fusion will feel right at home in the record’s smooth, comforting stew.

Har Mar Superstar’s latest album, Best Summer Ever, doesn’t always have the fun vibes one would expect given the title. Listen to “How Did I Get Through the Day,” a ballad that wouldn’t have sounded out of place on AM radio 60 years ago, for example. “I’m all alone, watching the phone,” sings Sean Tillman, who performs under the name Har Mar Superstar. “But you ain’t coming home.”

The song’s longing feels perfectly at home on Best Summer Ever. Many of the tracks focus on departures and yearning, such as closing track “Confidence” and the synthesizer-driven version of Bobby Charles’ “I Hope.”

Yet maybe these songs aren’t in conflict with the album’s title. Summertime is fleeting, as is the youth with which summer fun is most commonly associated.

Tillman explained the name of the sixth Har Mar Superstar record, which was released last month, in a phone interview ahead of his May 15 appearance at Daytrotter’s Davenport venue. “It’s something I say when people ask me to take photos with a group of friends, or if people are toasting,” he said. “No matter what time of year, I always say, ‘Best summer ever.’”

There’s more to the title than just being a goofy refrain Tillman uses with friends: “Since the album’s also kind of melancholy at a lot of points, I think that it’s got a nice kind of haunting, weird, sad vibe as well.”

When Blue Grass, Iowa’s David G. Smith recorded his last studio album, he actually cut enough material for two records. Given the consistently topical/political nature of 2014’s One House, a listener might expect the leftovers to taste a little like ... leftovers.

As the singer/songwriter/guitarist said in an interview last week – in advance of the local album-release show for First Love – “This one covers quite a bit of territory. ... This record is a little bit more on the softer side of things, maybe a little more introspective. It’s funny how a group of songs can seem to fit together.”

Indeed, it’s easy to hear that the record is bound in sorrow; half of the songs deal with lives and loves lost.

Listening to Sean Watkins’ fifth solo album, What to Fear, you might get whiplash trying to follow the wild swings in lyrical tone in just its first half. The title track opens things with an acidic attack on the media told from the perspective of the media, and it’s followed by the earnest, bite-sized confessions of “Last Time for Everything.”

“I Am What You Want” has menace and attraction in equal measure, as the narrator gently threatens to bend its target to his will: “But I swear you’ll learn to love me. / Darling, would I lie?”

“Keep Your Promises II” returns to a clever lyrical refrain from his previous album: “Just keep your promises. / Don’t let them leave your lips.” And that admonition to a serially dishonest partner segues back into a heartfelt love song in “Everything.”

Watkins, one-third of the platinum-selling Nickel Creek (with his fiddler sister Sara and mandolinist Chris Thile), doesn’t apologize for those abrupt shifts. In an interview last week promoting his April 14 Redstone Room show, he said: “If they like the songs, they like the songs. ... It’s all very me. It’s sincerely coming from me, and something that I feel is part of my musicality, so that’s okay. ... I’m not worried too much about the schizophrenic aspect, because I’m being honest.”