Matt Waldron' s current monthly digital single series is based on resurrecting material from the long-defunct Nine Day Antler Society web project which ran from 2012 - 2014. NDAS included contributions from irr. app. (ext.), At Jennie Richie, R. K. Faulhaber, Thomas Carnacki, The Recordists (myself and S.Higgins), Eriijk Rêssler / Swastika Novelty Co. and Crank Sturgeon. Although Matt's monthly digital single series is focused on reissuing the irr. app. (ext.) NDAS contributions, a few also involve collaborators. Last month's "single" features a collaboration between irr. app. (ext.) and The Recordists!
BTW, these "singles" are often more than just one track. The October edition is, in fact, 12 tracks!
And while we're at it, I should mention that the February edition of the series also includes a collaboration between irr. app. (ext.) and The Ossington Plank Ensemble (Matt Waldron, Greg Scharpen, W.A.Davison, S.Higgins, and Steve Stapleton).