Known alternately as Papa M, Aerial M, M is the Thirteenth Letter and, simply, M, David Pajo has woven in and out of some of the most creative bands in the midwest while working on his own innovative solo/side projects. Born in Texas in 1968 to Fernando “Nanding” Pajo and Darlene Feldbusch, he was raised in Louisville, KY, which is still his base of operations. He was a founding member of Slint, the Louisville-based slowcore band that wowed critics from 1987 to 1991. After they broke up, he played with a variety of bands, including the Palace Brothers, Stereolab, The For Carnation, King Kong and Royal Trux. He was also a full-time member of Tortoise until 1998, cutting back his involvement with them to work on the M projects.

The common thread between all of the M projects was Pajo’s expressive, nearly eerie guitar playing. Backed at times by gentle, wave-like rhythms and the hum of synths and keyboards, the music had a mesmerizing quality to it, while conveying images of great expanses of space. Notable projects included a split single with Laetitia Sadier under the name M is the Thirteenth Letter (on Palace Records in 1995), and three full-length albums on the Drag City label: the self titled Aerial M, released in 1997, Post Global Music, released in 1999 as Aerial M, and Live from a Shark Cage, the first album released under the Papa M name, in 1999. Sings followed two years later.