1985-10-xx: Rombouts School Orkest - RSO olv Rob Waltmans en Gerard de Groot (lp, DaCapo) [Marco Kalnenek was a member of this school band]
1988-05-xx: Marco Kalnenek - To all the people who hate me (cassette, New Age Pig Breeders)
1990-xx-xx: Marco Kalnenek - Democassette!!??? (cassette, no label)
1991-xx-xx: Marco Kalnenek - Music for looking at (cassette, no label)
1991-xx-xx: Marco Kalnenek - Collaaage (cassette, Unstbe)
1991-10-xx: Marco Kalnenek - Unstbe 3 (cassette, audio issue of Unstbe magazine, no label)
1992-xx-xx: Marco Kalnenek - Someweirdomusic (cassette, no label)
2001-10-xx: Kalnenek/Dörenberg - What were we thinking? (limited edition cd-r, Weirdomusic)
2004-11-22: Weirdomusic - Collaaage (download, reissue of cassette release,WM Recordings WM003)
 

Compilation appearances:
1988-08-08: Various Artists - Souvenir Parade '88 Brunssum (lp, Miragram)
[Marco Kalnenek appears as pianist of the Rombouts School Orkest on 1 track only]
1989-04-07: Various Artists - De Effektenbeurs/One minute songs (cassette, De Effektenbeurs)
1992-12-xx: Various Artists - Zappa cover competition (cassette, Gus Productions)
2003-11-01: Various Artists - Two zombies later (online cd, Comfort Stand Recordings CSR001)
2004-04-15: Various Artists - Interplanetary materials (online cd, Comfort Stand Recordings CSR020)
2004-08-14: Various Artists - Oddio Overplay celebration compilation (online cd, Oddiooverplay.com)
2004-10-08: Various Artists - Stand (online cd, compiled by Chenard Walcker, no label, but put online by Comfort Stand Recordings)
2004-10-31: Various Artists - Comfort Cake (online cd, Comfort Stand Recordingss CSR048)
2004-11-07: Various Artists - Water, wind and sails (online cd, WM Recordings WM001)
2005-05-xx: Various Artists - Ein Tribut an der Plan, Coverversionen, Interpretationen und Texte zum Werk (cd-r, Glück Auf! Recordings)
2006-10-25: Various Artists - Calling all fiends (online cd, Oddiooverplay.com)
2007-09-14: Various Artists - You need to get things right (online "audio exhibition", Oddiooverplay.com)
2008-09-16: Various Artists - Music For The Williamson Tunnels: A Collection Of The Sound Of Dripping Water (This double-CD set explores artists’ uses of the sound of dripping water from 1916 to the present, and combines works of historical importance with newly composed pieces. Produced in a limited edition of 1,000, this collection was given away free of charge, primarily to visitors of the Williamson Tunnels in Liverpool.)
2009-06-02: Various Artists - Life On Ceres (netBloc Volume 22) )online cd, blocSonic.com)
 

Airplay, radio & tv appearances, podcasts:
2000-07-20: cover version of Frank Zappa's "Let's make the water turn black" played on Uncle Bri's Early Morning Funhouse, CBC Radio. Canada.
2004-06-23: track "Fiber, ruler of Pinakel" played on Mondo Bongos at CFRU 93.3fm in Guelph, Ontario, Canada.
2005-06-05: track "Planologie dub" played on Space Bop at CKUT 90.3fm in Montreal, Quebec, Canada
2005-07-13: track "Fiber visits the Q Continuum" played on Lironcast Podcast
2005-10-25: 1 hour special featuring releases from WM Recordings on Radio404.org, including a fragment of Weirdomusic's "Collaaage".
2005-10-31: track "Fiber, ruler of Pinakel" played on Radio EMC
2006-06-04: telephone interview on Jan Turkenburg's Radio Zwolle Klassiek, about WM Recordings.
2006-09-01: tracks "The embryo and I" and "Satan in the white house" played on Vreemde Geluiden at Radio Zwolle, the Netherlands. 
2006-10-27: track "Very scary (part 2)" played on Vreemde Geluiden at Radio Zwolle, the Netherlands.
2006-10-29: track "Very scary (part 2)" played on Space Bop at CKUT 90.3fm in Montreal, Quebec, Canada.
 

Various items:
2007-09-xx: track "Very scary (part 2)" used by Frightmare Forest, a Halloween attraction in Cedar Rapids, Iowa, USA.
2008-10-13: track "Fiber visits the Q Continuum" used in game Pirate Fishing [Kloonigames]