Advance Base is the melancholic soft rock recording project of Chicago, IL singer/songwriter Owen Ashworth (formerly of Casiotone for the Painfully Alone). Using a two-handed arsenal of electric piano, Omnichord, samplers, effect pedals & drum machines, Ashworth builds minimalist, heavy-hearted, & nostalgia-obsessed ballads around his conversational baritone. The warm, electronic sound of Advance Base has been described as "lo-fi," "depressed" & "weirdly uplifting."

Horrible Occurrences, the fourth album of original songs by Advance Base, was released December 6, 2024 by Run For Cover Records / Orindal Records. In her Album of the Week review for Stereogum, Miranda Reinert writes: “(Ashworth’s) power as a songwriter has always been in the simple realism of the worlds he creates and the people who inhabit all of them.”

“It’s with no exaggeration we describe Owen Ashworth as one of the most consistent and important songwriters in contemporary indie music. From the earliest Casiotone For the Painfully Alone demos to most recent Advance Base single ‘Little Sable Point Lighthouse‘, Owen has crafted a catalogue of characters and circumstances with few rivals in the modern era. His is an ever evolving body of work which stands out in its deftness and humility and empathy and care, bringing to life individuals from across the spectrum of human experience while remaining unerringly attuned to the tender, fallible heart at the centre of each.” - Various Small Flames