CASE STUDY

Club Wintercircus

Enabling immersive impact from stereo content with the Areal Upmix Engine.

Located in the iconic circular building in the heart of Ghent, Club Wintercircus is one of Belgium’s most technically advanced venues. At its core sits a full L-Acoustics L-ISA immersive system, designed to deliver object-based spatial audio across a multi-cluster loudspeaker array.

From day one, the in-house technical team embraced immersive mixing. The L-ISA engine provided an intuitive and powerful workflow, allowing engineers to move beyond traditional left-right reinforcement into precise object placement and spatial depth.

Yet one structural challenge remained.
Not all content arrives as object-based productions.
A significant portion of programming, guest engineers, corporate content, and touring acts still deliver stereo. In an immersive venue, stereo playback across a multi-speaker array creates compromises. Engineers must distribute signals carefully to avoid comb filtering, phase conflicts, and unwanted summation artifacts. The result can be acceptable, but rarely optimal.

The question became clear: how can stereo content benefit from an immersive system without forcing every show into full object-based production?

This is where Areal entered the conversation, as part of a structured on-site evaluation period to assess how stereo content could be translated into the immersive environment using the Upmix Engine.

The immersive foundation at Wintercircus

Stan, part of the core technical team at Wintercircus, has been working with immersive systems since his final year at PXL. When L-ISA was installed, he adopted it immediately.

I embraced immersive from the start. It adds something extra to the experience which is difficult to achieve in stereo.

Caesar Edmunds

The transition from earlier immersive systems to L-ISA lowered the barrier for object-based mixing. Guest engineers could be guided toward immersive workflows through careful advance preparation, technical support, and trust building.

Around 60 to 70 percent of visiting engineers are open to immersive mixing when properly prepared in advance. The team invests heavily in this process: pre-show calls, shared sessions, object placement prep, and collaborative sound design.

Still, a consistent percentage prefers to remain in stereo. Others arrive with locked show files and limited time to adapt. In those scenarios, stereo remains the default.

For a venue built around immersion, stereo-only content presents both a limitation and an opportunity.

FOREST STAGE
loudspeakers - acoustics

configuration - Full circle

SHELTER STAGE
configuration - 16-point

The stereo dilemma in a multi-speaker environment

In an immersive room with 5 frontal clusters, surrounds, and height speakers, distributing stereo across the array requires compromise. Engineers can:
  • Keep playback frontal for consistency
  • Distribute stereo to additional speakers to widen coverage
  • Apply delays and EQ to reduce summation issues
But stereo fundamentally lacks spatial metadata. There is no object separation, no depth mapping, no intentional localization beyond left and right. As Stan explains:

There is always a challenge when you’re trying to get something useful out of a multi-speaker system with only a stereo source. You can make it sound okay, but there will always be conflicts.

Caesar Edmunds

The goal was not to create a gimmick. It was to achieve a spatial presentation that felt natural, coherent, and musically meaningful.

Introducing Areal: from workaround to spatial coherence

Stan first encountered Areal years earlier during a large-scale production in Antwerp. What stood out was how each cluster contributed to a unified spectral image.

You could really hear how the processing worked together. It created a full spectral image across the clusters.

Caesar Edmunds

When the opportunity arose to implement the Areal Upmix Engine at Wintercircus, the team focused on integration with the existing L-ISA infrastructure.

The process included:

  • Dedicated routing design
  • Custom presets tailored to the room
  • Multiple configuration modes
  • Measurement and fine-tuning
  • Timing alignment adjustments


Two primary presets were developed:

  1. A configuration with multiple frontal clusters and side reinforcement
  2. A more expanded version incorporating height information

The system quickly reached a strong starting point.

Right from the start, the presets were really good. It didn’t take much time to get to a solid baseline

Caesar Edmunds

Stan then refined timing, levels, and tonal balance to suit his taste and the room’s acoustic behavior.

FOREST STAGE
loudspeakers - acoustics

configuration - Full circle

SHELTER STAGE
configuration - 16-point

What changed in the room

The most striking outcome was not exaggerated movement or obvious spatial tricks.

It was subtle immersion.

The strength was that it made immersive playback make sense. It added value without being exaggerated. It was subtle, but the difference was huge.

Caesar Edmunds

Listeners did not immediately identify the system as “upmixed.” There was no obvious spotlight effect. Instead, the sound field became enveloping and cohesive.

When compared directly with pure stereo, the contrast became obvious.

If you switch it back to stereo, you immediately hear it. You think: okay, this is stereo. The subtlety is what makes it powerful.

Caesar Edmunds

Internal demonstrations confirmed the effect. Staff and programming teams listened first in the Areal preset, then in stereo. The improvement became clear only after the comparison.

Audience feedback followed naturally. Regular organizers and experienced listeners described the sound as more embracing and more immersive, without being able to point to a specific technical trick.

That invisibility is precisely the point.

The Areal Upmix Engine does not impose spatial effects. It reconstructs a spatial field from stereo material in a way that aligns with the room’s architecture and the loudspeaker topology.

Supporting immersive strategy, not replacing it

Wintercircus remains committed to object-based mixing whenever possible. For fully prepared productions, object-based workflows offer maximum creative control.

However, Areal expands the venue’s flexibility:

  • Guest engineers who prefer stereo can still benefit from spatial enhancement
  • Smaller desks without network audio integration can integrate more easily
  • Touring acts can explore immersive playback without redesigning their show
  • Corporate and keynote content can gain depth without multichannel assets

     

As Stan notes:

It definitely solves the problem of doing something sensible with stereo content in this venue

Caesar Edmunds

In other words, The Areal Upmix Engine bridges the gap between legacy stereo production and next-generation immersive infrastructure.

It allows venues to protect their immersive investment while respecting the reality of incoming content.

Beyond nightlife: a scalable concept for stereo ecosystems

While nightlife programming provides an obvious use case, the broader implication extends much further.

Any immersive venue, performing arts center, multipurpose hall, or touring system encounters stereo sources daily:

  • Playback tracks
  • DJ sets
  • Hybrid band productions
  • Corporate video content
  • Streaming feeds
  • Support acts without immersive show files

For artists hesitant to commit to object-based production from day one, upmixing provides an entry point. Bands can continue touring with stereo show files while still accessing spatial enhancement in equipped venues.

This lowers the psychological and technical barrier to immersive adoption.

Rather than forcing a binary choice between stereo and full object-based mixing, Areal creates a continuum.

FOREST STAGE
loudspeakers - acoustics

configuration - Full circle

A future-oriented perspective

After extended use, Stan’s conclusion is forward looking.

I would love to see Upmix Engine in other venues and explore it deeper.
I really enjoyed working with it.

Stan
The enthusiasm stems from practical experience. The technology did not complicate workflow. It simplified a recurring problem. It aligned with the venue’s immersive philosophy without replacing its object-based foundation.

For venues like Club Wintercircus, the future of spatial audio is not exclusively object-based or exclusively stereo.

It is flexible.

And with intelligent upmixing,
 stereo content no longer limits
what an immersive system can deliver.