Sonic Encounters Swarm of the Nanobots

[Update – Fixed a broken link to the audio file so I could feature this as #TBT]

The swarm of the Nanobots is approaching.  This micrtonal mayhem is an exploration of swarming notes and joyous distortion that was inspired by the Dewanatron Swarmatron instrument. I performed and recorded this in one real-time pass with no edits on an Elektron Octatrack.


011 Swarm of the Nanobots cover

Music and cover art by Mark Mosher

Performance and Production Notes

Inspired by the Swarmatron

This piece was inspired by the Dewanatron Swarmatron (

“The Swarmatron was created to produce eight tones tuned approximately to one note, each tone slightly different in pitch to produce a complex and natural choral effect.

These eight oscillators can be played with a single ribbon controller (variable resistor) to move the pitch center up or down.

The span control expands the sound of a swarm of eight notes spread just a few cents apart into a wide chord of equidistant pitches spread over the entire spectrum. The player can “taffy pull” the resulting chord by using the span control and pitch ribbon in tandem.

Swarms of sine waves evoke swarms of angels congregating. Swarms of sawtooth waves evoke the swarming of bees. The sound of a host of voices, earthly or unearthly, has a unique character recognized by the ear even when they are folded together in unison.”

There is a nice overview of how a Swarmatron works in this video “Charles Hazlewood plays Thunderbirds, Jarvis Cocker and Barry Gray’s Ondes Martenot” at 8m25s This video inspired me to explore the Swarmatron deeper and attempt to emulate it with the Octatrack.

The Swarmatron was also used by Trent Rezonor and Atticus Ross on the soundtrack to The Social Network which you can see in this video Trent Reznor – Swarmatron (The Social Network bonus DVD).

Emulating Amazing Instruments

The Barry Gray tribute video got me to thinking about using the Swarmatron and inspired me to try and reproduce it in some way using the instruments I already own. I decided to use the Octatrack becuase like the Swarmatron it has 8 oscillators you can switch on and off. It has a crossfader that could act as a sort of ribbon controller.

Process: Emulating The Swarmatron with an Octatrack

For my fellow electronic music artists here are the details on how I pulled this off with the Octatrack.

  1. I sampled sawtooth wave from the Nord into track 1 of the Octatrack using a Flex machine.
  2. I used the on-board audio editor to normalize the audio; set start, end an loop points to zero crossings; and then cropped the sample.
  3. I used the file menu to save the sample and assign it to the track naming it “Nord01”.
  4. I duplicated this idea on to tracks 2-7 in pointed Flex machines for those tracks to the same source sample.
  5.  I went through each track and panned and slight detuned each one.
  6. I configured each track to have slightly different effects. So some had chorus delay. Others had filter and phaser etc… all in the box.
  7. Track 8 is a master track with filter and reverb in Part 1 and in Part 2, comb filter and reverb – so my Swarmatron is 7 voice :^)
  8. I made some scene B variations so the crossfader would either detune or change the playback speed emulating the swarm.
  9. Like a real Swarmatron, I use the track mutes to bring oscillators in and out.
  10. I performed using mostly chromatic trig mode and manually modulated parameters with the crossfader and manually manipulated parameters. I used a little sequencing of some notes with “slide trigs” to emulate playing notes on a ribbon (in addition to manipulating pitch and swarm with crossfader).

All the distortions are intentional (as in I’m not over-driving the inputs). I’m super happy with the non-linearities in this and I think this shows once again that digital can be unstable and organic when you use feedback in effects circuit models in the proper way.

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Hi, this is Mark Mosher. Welcome to my blog. I’m a synthesist, Composer, Producer, and Visualist living in Boulder CO. I’m also the founder of the Rocky Mountain Synth Meet and Synth Patrol.

I’ve been blogging wince 2005 and this blog is a mix of posts on artistic news as well as synth tech & technique posts under the category Modulate This!

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5 responses to “Sonic Encounters Swarm of the Nanobots”

    • Mark Mosher • Electronic Musican | Synthesist | Composer | Improvisor • Boulder, CO says:

      Thanks! And thanks for time to listen and comment.


      • Thanks for you reply. I have been listening again and again to it. It is really beautiful and by far the most interesting use of the OT. I have a virus ti synth that I love and that has great sound design abilities. I now am looking for a sampler/sequencer. How is the OT sequencer? Do you use it? Is the monophony of the 8 tracks a frustrating limitation or a creative one? Thanks in advance for our answers.


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