Sound as a sales tool: How in-store audio affects retail ROI
Retail stores invest heavily in the physical environment. Lighting, layout, and materials are planned carefully and managed consistently. Sound is typically treated differently — added late, managed locally, or left unattended entirely.
That is a missed opportunity. And in some cases, it is actively harmful.
Why sound is no longer optional in retail
The research on in-store music is consistent: the right audio environment increases dwell time, improves brand perception, and influences purchasing behaviour. University of Bath research suggests that appropriate background music can increase consumer spending by over 10% by creating a more engaging experience.
But the more important finding is the negative case. Shoppers linger in areas where sound feels comfortable and move quickly through spaces where audio feels intrusive or unclear. When speakers are clustered near entrances or tills, those zones become acoustically aggressive, while deeper sections of the store feel flat or disconnected — unintentionally steering customers away from high-margin areas. Communitize
Poor sound distribution does not just fail to help. It actively disrupts natural movement patterns and shopping behaviour.
The difference between music and sound design
Most discussions about retail audio focus on playlist selection. That matters, but it is secondary to coverage.
Studies show that sales improve when the music is congruent with the products and brand identity. But congruence only works if the music actually reaches the customer evenly. A well-chosen playlist delivered through poorly placed speakers — creating hotspots near the entrance and dead zones at the back — produces a worse result than consistent, moderate background music across the whole floor. Melodial
The goal is not just to play music. It is to create a consistent acoustic environment across every square meter of the store.
What "playlist drift" costs a retail chain
For single-location stores, audio management is relatively straightforward. For chains, it becomes a governance problem.
When local staff controls the music — selecting playlists, adjusting volume, or connecting personal devices — the result is a fragmented experience across locations. Two stores in the same brand portfolio can feel completely different, undermining the consistency that makes a brand recognizable.
Brand-fit music, compared with no music at all, increases dwell time by over 42%. That lift disappears when different stores deliver different experiences. Shopify
Fixing playlist drift requires moving control from the shop floor to a central level — the same way lighting schedules and window displays are managed from headquarters, not left to individual store managers.
The ROI case for upgrading sound infrastructure
Every square meter of a retail store carries a cost. Rent, fit-out, staffing, and inventory all require a return. If a section of the store delivers a poor acoustic experience — too loud, too quiet, or inconsistent — it underperforms relative to its cost.
Good retail soundscapes can lead to a 28% increase in sales, while bad soundscapes can lead to a 28% decrease. The gap between a well-managed and a poorly managed acoustic environment is significant enough to affect overall store performance. ROCKWOOL
For retail chains, the calculation is straightforward: a system that delivers consistent, even coverage across all locations removes a variable that would otherwise undermine the investment made in everything else.
What good retail sound infrastructure looks like
The stores that treat sound as infrastructure — rather than an afterthought — share a few characteristics:
Consistent coverage across the entire floor, with no hotspots or dead zones. Omnidirectional speakers, like those in Spottune's system, distribute sound evenly in all directions, covering up to 75m² per speaker and eliminating the uneven distribution that directional speakers create.
Central control over playlists, volume, and scheduling across all locations. This removes playlist drift and ensures brand consistency is maintained regardless of which store a customer visits.
Simple infrastructure that does not require rewiring when layouts change. Wireless systems that mount on existing lighting track allow speaker placement to adapt as the store evolves.
Frequently asked questions
Does in-store music actually increase sales?
Yes, consistently across multiple studies. The effect is strongest when music is appropriate to the brand and delivered at a comfortable, even volume across the entire space. Poorly distributed sound can have the opposite effect, disrupting shopping behaviour and reducing dwell time.
What is playlist drift and why does it matter for retail chains?
Playlist drift occurs when individual store staff control music selection locally, leading to inconsistent audio experiences across locations. It undermines brand consistency and removes the ability to execute a coordinated in-store audio strategy at scale.
How do I calculate the ROI of a new retail audio system?Start with dwell time. A 1% increase in average dwell time correlates with approximately a 1.3% increase in sales. If upgrading your sound system produces measurable improvement in how long customers stay — particularly in areas that previously had poor coverage — the payback period is typically measured in months rather than years.
Summary
Sound is not a finishing touch in retail. It is infrastructure — and like all infrastructure, it either performs consistently or it creates problems.
The stores that get it right treat audio the same way they treat lighting: with a single system, central control, and consistent delivery across every location. The stores that do not create a fragmented experience that undermines everything else.
See how Spottune manages sound across retail chains →
