Amy Oelsner’s homemade pop songs sparkle with these eternal truths: that story-telling is part of being alive, and excavating the past is part of growth. Oelsner, who records as Amy O, is a lifer of the indie-pop underground for whom songwriting is a way of processing the passing of time. Her latest, Shell, brims with poetic granular details of everyday life; its her third studio album, and tenth including her many years of home recordings.Its title track is a beautiful, bouncing power-pop ode to grappling with the people you used to be, with twisty interlocking wordplay and bright hooks and harmonies. Written after reading through a bunch of old emails and letters, “Shell” bops along with subtle heaviness as Oelsner revisits the minutiae of past lives, collaging a decade’s worth of snapshots and people and places: “In the song, I’m looking back fondly on a younger version of myself, celebrating the ways I’ve grown since then and also seeing how I can reincorporate some of those traits I’ve lost over the years into myself now.”Following 2017’s Elastic, Oelsner continues living up to that album’s namesake: Shell similarly stretches with melodies upon melodies. But here there is greater use of space and pace and patience. Perfectly minimal riffs slowly build, ebb, erupt and recoil; guitars and keys layer and swell; there are moments of steady piano-pop, intricate drums and pristine criss-crossing vocal melodies. On Shell, Oelsner deals in the outer and inner boundaries of self. She grapples with mortality, physical transiency and vulnerability, the concept of home. There are homages to the formative relationships that shape our lives, imperfect as they may be. There are meditations on the mundane daily routines that support mental and physical health; in her description of it, Oelsner wanted to honor invisible processing, the inward emotional labor that often goes unseen, the type of internal work that is “not encouraged by society and can make you feel like you’re disappearing.”The first song written for Shell was “Planet Blue,” a song about the difficulty of grieving, but also about how lightness and silliness can sometimes coexist with depression. “Crushed” is a perfect noisy pop miniature, a vignette of suburban teen life, sneaking out of windows to meet in parking lots. “Good Routines” recalls Takeoffs and Landings era Rilo Kiley, as Oelsner sings that such routines are “only what you make them,” while “Zero” builds on a crunchy drum machine into one of the album’s stickiest refrains. The subtle twang of “Rest Stop” captures a moment in time during an end-of-summer road trip. It was written after Oelsner got married, moved to a new home, and quit a job of five years: “It’s about changes, when you’re halfway between the old and the new.” Indeed, the time between Elastic and Shell was one of personal changes. In addition to her work as a musician, Oelsner is also an educator and arts organizer, who has lived all over the country and taught zine writing to teenagers for years. More recently, she’s been teaching songwriting at a local community college and launching Girls Rock Bloomington, a music camp for girls, trans and non-binary youth.For Oelsner, music is a way of connecting with herself, her personal history and context. Going into the process of writing Shell, she says: “I was noticing a gap forming between my ‘adult’ self who was moving forward with her life and parts of my younger self that were stuck behind and hadn’t yet caught up. The process of writing and recording Shell played a big role in helping to get some of those stuck parts of myself caught up and able to join me in the present so that I can move forward in a more fully embodied way.”