Ernst Karel, Heard Laboratories (and/OAR, forthcoming)

Helen Mirra/Ernst Karel, Maps of parallels 41°N and 49°N, at a scale of ten seconds to one degree (forthcoming)
- stereo version of dual mono installation

EKG & Giuseppe Ielasi, Group (Formed, 2006)

EKG, No sign (Sedimental, 2005)

Fred Lonberg-Holm’s Lightbox Orchestra, Instant landscape (Terry Plumming, 2005)
- with Guillermo Gregorio, Liz Payne, Uncle Woody Sullender, Ben Vida, Michael Zerang, TV Pow, etc

Television Power Electric, 2 (Kuro Neko, 2004)
- with TV Pow, Toshimaru Nakamura, Boris Hauf

Relay Signals (Lucky Kitchen, 2004)
- with Tim Daisy, Jason Ajemian, Zoe Buck, Aram Shelton

Who cares how long you sink (Lucky Kitchen, 2004)
with Jason Ajemian, Matt Bauder, Aram Shelton, Tim Daisy, Jeff Parker, etc

Helen Mirra/Ernst Karel, on Sound writing 10" lathe-cut compilation (DeadCEO, 2004)

Ernst Karel, "1/3 TVP 24.02.02", on TV Pow, Powerful Friends And Devoted Lovers, (Bottrop Boy, 2004)
- reworking of a recording of my contribution to a TV Pow performance

EKG, Object 2 (Locust Music, 2003)

Ernst Karel, Fern Room (BOXmedia, 2002)
- stereo version of quadraphonic sound installation

Fred Lonberg-Holm’s Lightbox Orchestra, First Contact! (Locust Music, 2002)
- with Jim O'Rourke, Kevin Drumm, Jeb Bishop, Guillermo Gregorio; members of Town and Country, Pillow, and TV Pow; etc

Ernst Karel, on Noise brunch sampler plate compilation (CIP, 2002)

Boris Hauf/Ernst Karel/Michael Hartman, 'Un', on Winter construction (DeadCEO, 2002)

Ernst Karel/Brent Gutzeit/Jason Soliday, 'Splinter 3', on Winter construction (DeadCEO, 2002)

EKG, Shift or latch (Crank Satori, 2001)

Television Power Electric, Television Power Electric (Gentle Giant, 1999)
- with Jim Baker, Otomo Yoshihide, Aaron Bergman, Rob Wilkus, TV Pow

The Improvisation Meeting in Chicago (Radio Off Duty, 1998)
- with David Grubbs, Michael Hartman, Masahiko Okura, etc

Myopic Bookstore Improvised Music Workshop Vol. One (BOXmedia, 1998)

Blowhole, Billowing Sheen (Apraxia/Animist, 1996)

Blowhole, Reassembled (b/b Tapes, 1995; reissued on CDR by Lunhare, 2008)

Blowhole, Gathering LP (Giardia/Fusetron/Carburetor, 1994)
- with Patrick Barber, Jeph Jerman, Amy Denio, Hyla Willis, etc.

plays trumpet as a guest on:

The Missing Ensemble, Zeropolis (Low Impedence, 2007)

The M's, The M's (Brilliante, 2004)

Central Falls, Love and easy living (Truckstop, 2003)

Olivia Block, Mobius Fuse (Sedimental Records, 2001)

The Incredible Moses Leroy, Electric Pocket Radio (Ultimatum/Artemis, 2001)

Bobby Conn, The Golden Age (Thrill Jockey, 2001)

Bobby Conn, Llovessonngs (Thrill Jockey, 1999)

Simon Joyner, The Lousy Dance (Truckstop, 1999)

David Grubbs, The Thicket (Drag City, 1998)

Negativland, Happy Heroes (Seeland, 1998)

Aiko Shimada, Bright and Dark (Bera, 1995)

Soundgarden, Badmotorfinger (A&M, 1991)