We've updated our Terms of Use. You can review the changes here.

The Sleep Theory Collection

by Altus

  • Streaming + Download

    Includes unlimited streaming via the free Bandcamp app, plus high-quality download in MP3, FLAC and more.
    Purchasable with gift card

      $16 USD  or more


  • Full Digital Discography

    Get all 57 Altus Music releases available on Bandcamp and save 30%.

    Includes unlimited streaming via the free Bandcamp app, plus high-quality downloads of Hidden Realms and Vacant Spaces, Our Unyielding Sky, Fractional Dimensions Volume 1, Anthropoaliena, Pallid Memories, Robot Party (Digital 7"), Hypoxia, Pure, and 49 more. , and , .

    Purchasable with gift card

      $109.20 USD or more (30% OFF)


  • Limited Edition 4-CDr Set
    Compact Disc (CD) + Digital Album

    Collects the complete Sleep Theory series (4 volumes).
    4 discs stored in a wooden keepsake box with metal clasp.
    Handstamped Altus logo on top. Numbered inside.

    Includes unlimited streaming of The Sleep Theory Collection via the free Bandcamp app, plus high-quality download in MP3, FLAC and more.

    Sold Out

Session 1 19:40
Session 2 22:30
Session 3 20:10
Session 4 16:53
Session 5 22:05
Session 6 20:53
Session 7 21:20
Session 8 21:41
Session 9 20:30
Session 10 19:49
Session 11 22:40
Session 12 24:05


When I originally conceived the Sleep Theory series in late 2010, before even writing a note, I was aiming to create warm drones to be used as a sleeping aid. That concept was quickly lost once I sat down to create it. Instead of being music for sleep, it was music about sleep. That said, I’ve been happy to discover that it hasn’t stopped listeners from using it as a sleep aid.

I’ve had a long-standing fascination with dreams, and how our bodies rejuvenate as we rest. These sessions are an aural exploration of these processes, and what you hold now is a culmination of work over ten years.

Each session has been carefully remixed and remastered to create a cohesive experience of just over 250 minutes worth of music. I hope these sessions will bring you to places of introspection and wonder for many years to come. Enjoy the journey!

The original albums can be purchased separately here:


released April 2, 2021

Composed by Mike Carss

Volume 1 (Session 1 - 3): December 2010 - March 2011
Volume 2 (Session 4 - 6): October - December 2013
Volume 3 (Session 7 - 9): February - April 2017
Volume 4 (Session 10 - 12): September - December 2020




Altus Music Ottawa, Ontario

Aural Journeys
for the Mind's Eye

The music of Altus, Loneward & Burlorke

contact / help

Contact Altus Music

Streaming and
Download help

Shipping and returns

Redeem code

Report this album or account

If you like The Sleep Theory Collection, you may also like: