Each week the Monday Mix features three fresh songs from opbmusic’s broadcast. This week we feature much anticipated new music from Unknown Mortal Orchestra and two new singles from some of Philadelphia’s finest — Hop Along and Dr. Dog.

Unknown Mortal Orchestra - ‘American Guilt’

Unknown Mortal Orchestra is back with a new single, “American Guilt.” It opens with a stoner metal-ish riff. Ruban Nielson’s double-tracked vocals are on the raspier side of the bands’ constantly evolving lo-fi to soul spectrum. The band’s last full-length, “Multi-Love,” came out in 2015, so we’re taking this as a hopeful sign that more new music is on the way. Unknown Mortal Orchestra plays the Roseland Theater in Portland on May 9. Be sure to check out Ruben Nielson’s solo acoustic set from the opbmusic studio.

Hop Along - ‘How Simple’

Hop Along’s latest track “How Simple” has everything, sweetness, grit, a shout-along chorus and different flavored guitar leads for every section of the song. Frances Quinlan’s ever-poignant lyrics allude to a breakup in a way that acknowledges the complexities of such an experience. Hop Along’s upcoming album, “Bark Your Head Off, Dog” comes out April 6.

Dr. Dog - ‘Listening In’

“Listening In” by Dr. Dog feature’s slick, spacious production. Scott McMicken’s cryptic lyrics are punctuated with surreal instrumental flourishes. Dr. Dog have never shied away from dark and heavy subject matter, but this time the atmosphere seems to have caught up with the meaning. Dr. Dog play the Arlene Schnitzer Concert Hall in Portland on June 8.