Next Show October 29th at 7 pm at the Denver SIE Film Center

Join us for a “muy spectacular” double-Feature screening Sat. Oct. 29 at 7pm – after a special pre-film music performance by Carbon Dioxide Ensemble (Co2E).

Scream Screen – hosted and curated by Theresa Mercado – presents a terrifying trip to Mexico to spotlight two of Mexican gore-master Rubén Galindo Jr.’s greatest entries to the horror canon: CEMETERY OF TERROR and DON’T PANIC!

A special Halloween party in the Henderson-Withey Lounge starts at 5:30pm with tricks, treats and prizes for best costume!!!



The Carbon Dioxide Ensemble (CO2E) is a collaboration with Thomas Lundy, Victoria Lundy, and Mark Mosher. We focus on live improvisational performance art and musique concrète and are based in Colorado.

In this unique music and multimedia act, Mark uses the Elektron Octatrack dynamic performance sampler and other electronics to live-sample Thomas Lundy as he manipulates a Copper Heart with dry ice and other objects. Victoria Lundy accompanies on Theremin and live electronics. The only audio source for Octatrack other than drum samples is the input from the contact mic on the Copper Heart. Mark also provides interactive visuals with live camera input to further enhance the experience.

CO2E descends from Denver’s Carbon Dioxide Orchestra which you can learn about here.

Since 2014, we have performed multimedia concerts in an around the Denver area including the long-running Concréte Mixer concert series at the Walnut Room, were the opening act for day 2 of the Denver International Noise Fest, collaborated using graphical scores with the filmmaker Taylor Dunne, and were invited to play a music convocation for the Lamont School of Music at the University of Denver performing on stage at the Gates Concert Hall.

In 2022 we started releasing 4K multimedia performance videos on YouTube.


The Carbon Dioxide Ensemble – “Unmaintained Heavy Machinery” in 4K (5/28/2022)

Performance behind-the-scenes performance video in collaboration with filmmaker Taylor Dunne.

More Videos on YouTube


Some of Denver’s Most Challenging Music Finds a New Audience at DU…

DU is certainly no stranger to experimental music on campus, but it is certainly rare for this sort of performance to happen at a university in general…

Perhaps out of this performance, a new crop of adventurous musicians will take root in Denver or at least a greater awareness of the existence of an experimental scene in Denver spread to people who might be completely ignorant of it.

Westword Magazine


May 28th, 2022
4k Multicamera Performance with Interactive Visuals

Rocky Mountain Synthesizer Meet Drone Day Celebration Livestream


July 27, 2019
Presentation & Performance – “Theremin, Musique Concrète, and Live Sampling, Oh My!”

Colorado Modular Synth Festival
Denver, CO

April 8th, 2017
Carbon Dioxide Ensemble with Filmmaker Taylor Dunne

TIME+SPACE Process Reversal Fundraiser
The Temple, Denver

Dec 22nd, 2016
The Carbon Dioxide Ensemble (CO2E) Opens Day 2 of the Denver International Noise Fest 2016

Globe Hall, Denver

Nov 27th, 2016
Concréte Mixer #6 – Featuring Mark Spybey of Dead Voices on Air

Walnut Room, Denver

April 4, 2015
Concréte Mixer #5 – Featuring Mark Spybey of Dead Voices on Air

Walnut Room, Denver

January 30th, 2015
Concréte Mixer #4 – An evening of solo and collaborative musique concréte

Walnut Room, Denver

October 13th, 2014
Concréte Mixer #3 – Convocation

Lamont School of Music
University of Denver

June 24th, 2014
Concréte Mixer #2 – Solstice

Walnut Room, Denver

June 25th, 2014
Concréte Mixer #1 – An evening of solo and collaborative musique concréte

Walnut Room, Denver

Photos from Our Adventures

Contact & Bookings


The Carbon Dioxide Ensemble descends from Denver’s Carbon Dioxide Orchestra, a group that performed in the 1990s and early 2000s. An earlier incarnation of the CO2 Orchestra performed in the 1980s.

The Copper Heart was built and played by William Valdez. The Orchestra had a changing membership that at various times included David Dickson, Leroy Jaramillo, Victoria Lundy, Eduardo Mendez, Jason Mieger, and Bruce Nickerson.