The dome is not just a visual medium — it is one of the most demanding spatial audio environments ever designed. A well-equipped fulldome venue wraps the audience in sound from every direction, far beyond what a cinema or concert hall can achieve. But the range of systems is enormous: from the 98-channel mastery of the Satosphere to the humble 5.1 setups found in smaller planetariums worldwide.
This guide ranks the leading venues by speaker count and explains what that actually means for your audio — plus a complete guide to spatial audio formats and how to deliver your work correctly.
🇨🇦 Satosphere — SAT Montréal
🇩🇪 Zeiss Planetarium Jena
🇺🇸 Fiske Planetarium — CU Boulder
🇺🇸 Hayden Planetarium — American Museum of Natural History
🇺🇸 Adler Planetarium — Chicago
🇨🇿 Brno Observatory & Planetarium
🇸🇪 Wisdome Stockholm
📊 Quick Comparison Table
| Venue | Speakers | Native Format | Dome Ø | Country |
|---|---|---|---|---|
| Satosphere (SAT) | 98 (93 FR + 5 LFE) | 3rd Order HOA / WFS | 18 m | 🇨🇦 Canada |
| Zeiss Planetarium Jena | Contact festival | 3D audio (HOA, post-2026 upgrade) | ~23 m | 🇩🇪 Germany |
| Fiske Planetarium (DFW) | Not published | Surround | ~20 m (65 ft) | 🇺🇸 USA |
| Hayden Planetarium | Not published | 5.1 Surround | 26 m | 🇺🇸 USA |
| Adler Planetarium | Not published | 5.1 Surround | ~20 m | 🇺🇸 USA |
| Brno Observatory & Planetarium | Not published | 5.1 Surround | N/A | 🇨🇿 Czechia |
| Wisdome Stockholm | TBC | TBC (new 2025) | TBC | 🇸🇪 Sweden |
| Typical mid-range planetarium | 8–24 | 5.1 Surround | 12–18 m | Worldwide |
| Small/portable dome | 4–8 | Stereo or 5.1 | 4–8 m | Worldwide |
🎚️ Spatial Audio Formats Explained
Fulldome audio is a specialist field. Most films are delivered in standard 5.1 surround, but advanced venues like the Satosphere and the upgraded Jena planetarium can decode and play back significantly more sophisticated formats. Here is a guide to the main formats you need to know.
Stereo (2.0)
Left + Right. The minimum viable audio format. Every venue can play it. No spatial imaging in the dome — sound appears to come from the front only. Use only as a last resort or for archival purposes.
5.1 Surround
L, C, R, Ls, Rs + LFE (subwoofer). The industry standard for planetarium audio. All digital fulldome venues support it. Gives front, rear, and centre coverage but no height — sound is essentially a horizontal ring around the audience. Adequate but not immersive in the true dome sense.
7.1 Surround
Adds side surrounds to 5.1. Wider horizontal image. Still no height channels. Better than 5.1 for dome content but still limited for full spherical immersion.
Ambisonics B-Format (1st Order)
4 channels (W, X, Y, Z). True 3D audio — captures and reproduces sound from all directions including above and below. The classic format for VR and early dome audio. Supported by most modern digital planetariums. Limited spatial resolution — sounds can feel slightly diffuse.
Higher Order Ambisonics (HOA)
2nd order = 9 channels. 3rd order = 16 channels. Each additional order dramatically sharpens spatial precision — sounds lock more tightly to their positions. 3rd order HOA (16ch ACN/SN3D) is the current gold standard for high-end fulldome audio and the native format of the Satosphere. Recommended for any work targeting SAT or the upgraded Jena planetarium.
Wave Field Synthesis (WFS)
Uses a very large number of densely packed speakers to physically reconstruct sound waves — rather than simulate spatial perception. Creates a "physical" presence of sound sources rather than a psychoacoustic illusion. The Satosphere's 93-speaker array is WFS-capable. Requires venue-specific authoring tools.
VBAP / DBAP
Vector Base / Distance Base Amplitude Panning — mathematical methods for distributing sound across any irregular speaker array. Used in live performance and installation contexts where Ambisonics decoding isn't available. Requires knowledge of the specific speaker layout of each venue.
Binaural (Headphone)
2-channel but processed with HRTFs (head-related transfer functions) to simulate 3D space on headphones. Used for previewing dome audio without speakers, and for streaming/online versions of dome content. Not used for dome playback itself — always convert to the venue's speaker format for actual screenings.
📦 Audio Delivery Guide
Different venues require different delivery formats. Here is what to prepare:
| Target Venue | Recommended Delivery Format |
|---|---|
| Satosphere (SAT Montréal) | 3rd Order HOA, 16 channels, ACN/SN3D, WAV 24-bit 48kHz — contact SAT R&D for exact specs |
| Zeiss Jena (post-2026 upgrade) | 3rd Order HOA preferred; 5.1 fallback. Per submission guidelines: separate uncompressed WAV files per channel, 16-bit 48kHz, filenames must match video filename with channel suffix |
| Fiske Planetarium (Dome Fest West) | Contact submissions@domefestwest.com for current specs |
| Standard planetarium (most festivals) | 5.1 surround — 6 separate WAV files (L, C, R, LFE, Ls, Rs), uncompressed, 24-bit 48kHz minimum |
| Unknown venue / safe fallback | 5.1 surround + stereo mix. Always include both. |
| Live performance | Discuss with venue technical team well in advance — live spatial audio requires venue-specific routing configuration |
MyWork_L.wav, MyWork_R.wav). This is specified in the official 2026 submission guidelines.
🛠️ Spatial Audio Tools for Dome Production
SpatGris (SAT — free)
Open-source spatial audio plugin developed by the SAT R&D lab. Designed for dome and immersive contexts. Outputs HOA and direct speaker feeds. github.com/GRIS-UdeM/SpatGRIS
Reaper + IEM Plugin Suite
The IEM (Institute of Electronic Music, Graz) plugin suite provides a full HOA production workflow: encoding, decoding, binaural monitoring, and room simulation. Free, open-source, works in Reaper and other DAWs.
Ambix / O3A
Ambix (Matthias Kronlachner) and the O3A suite are widely used HOA plugin collections for DAW-based Ambisonics production. Both support up to 7th order HOA. Free / low cost.
Spatial Audio Designer (New Audio Technology)
Grammy-nominated commercial tool by Tom Ammermann — a regular at the Jena Frameless Forum. Includes binaural monitoring environments for around 70 professional spaces including fulldomes. Good for previewing dome mixes on headphones.
dearVR PRO / SPAT Revolution
Commercial tools for real-time 3D audio spatialisation. SPAT Revolution (IRCAM) is widely used in professional immersive audio production and supports HOA, WFS, and arbitrary speaker arrays.
Binaural Preview
Always create a binaural (headphone) render of your HOA mix for sharing and review — tools: Reaper + IEM BinauralDecoder, or dearVR Monitor. This lets collaborators and festival curators preview your spatial audio without a dome.
Research compiled February 2026. SAT speaker data verified from sat.qc.ca. Fiske data from colorado.edu/fiske. Jena audio data from official 2026 submission guidelines PDF. Other venues: publicly documented specifications where available; estimated figures noted as estimates. Always verify directly with venues before production.