Fiddle and accordion. Pretty nice. Available on iTunes and also on Bandcamp: https://lynnseyandtreasa.bandcamp.com/album/dyad
From the info on Bandcamp:
Dyad, meaning "twoness," pairs traditional tunes sourced from archival collections alongside modern compositions. Our dyad of fiddle and accordion blend seamlessly to create the experience of a solo performance. With each tune melody, we explore its unique possibilities through our arrangements, variation, and improvisation.
released May 2, 2019
Recorded at ITMA Studios, 73 Merrion Square, Dublin, Ireland
Thanks to the Irish Traditional Music Archive for use of their studio space and equipment.
Non-standard fiddle tuning: Track 3 - AEAE; Tracks 6, 11, & 13 - ADAE.
All tracks traditional, except where noted.
Arranging: Lynnsey Weissenberger & Treasa Harkin
Recording, mixing, & mastering: Danny Diamond
Photography & design: Lynnsey Weissenberger