South Korean singer Yeahwon Shin’s ECM debut, “Lua ya” is a gentle album of songs and lullabies, recorded in 2012 in the spacious acoustics of Mechanics Hall, near Boston. It’s a very intuitive set, shaped by “improvising, listening to our childhood memories and letting the music flow”, as Yeahwon says. Shin and pianist Aaron Parks played together just once before the present recording, finding “an instant improvisational connection” which is further explored here. Accordionist Rob Curto shares with Yeahwon an affinity for Brazilian music and has collaborated with her previously (in contexts including her Latin Grammy-nominated album “Yeahwon” on ArtistShare). But this new disc is a project beyond the idiomatic borderlines: Korean children’s songs are amongst the inspirational sources, and jazz has influenced the phrasing and imagination of all three participants, yet “Lua ya” seems to emerge from a place of pure music and a common reservoir of feeling. Yeahwon Shin dedicates the set to mothers and children everywhere.