The Communications Authority of Kenya (CA) has commenced a 12-month pilot phase for Digital Sound Broadcasting (DSB) services in Nairobi, marking a significant step toward modernizing the country’s radio landscape.
Why Digital Sound Broadcasting?
DSB technology converts analogue data into compressed digital signals, enabling multiple radio stations to share a single frequency. The initiative was announced on February 14, World Radio Day, as a response to limitations in the FM frequency spectrum (VHF Band II, 87.5–108.0 MHz), including:
- Saturation in major coverage areas.
- Increased interference.
- Relatively poor audio quality.
- Limited space for new broadcasters.
Benefits for Broadcasters and Listeners
The CA highlighted several advantages of DSB:
- Lower transmission costs by hosting multiple services on one channel.
- Wider coverage and reduced barriers to entry for new broadcasters.
- Reserved capacity for community radio stations at nominal carriage costs.
- Clearer sound quality and reduced interference.
- Greater diversity of content, including niche, regional, and thematic programming.
- Potential value-added services, such as programme and station information.
“Broadcasters and investors stand to gain from wider coverage, lower barriers to entry and new revenue opportunities,” CA noted.
Current Deployment
At present, 14 radio programmes within Nairobi are being hosted on a DAB+ trial network provided by Mast Rental Services Ltd. The provider, alongside Signet Signal Distributors Ltd, was granted approval in 2015 to deploy trial networks for DSB.
The CA’s framework, developed in 2023, focuses on Digital Audio Broadcasting (DAB) in VHF Band III (174–230 MHz) and Digital Radio Mondiale (DRM) in the HF band (30 MHz).
Roll-Out Plan
The pilot will begin with the Mombasa–Nairobi–Kisumu corridor and expand to major population centres. During the 12-month trial, CA will monitor:
- Signal coverage.
- Quality of service.
- Affordability of receivers.
- Public education to encourage voluntary uptake.
Importantly, existing FM services will not be replaced, as no analogue switch-off date has been set.
Stakeholder Engagement
The framework was developed with input from broadcasters, signal distributors, equipment vendors, government agencies, and industry associations. With radio reaching 98% of Kenyan homes and supporting over 300 licensed broadcast services, the pilot represents a crucial step in sustaining radio’s role as one of the country’s most influential media platforms.
Conclusion
Kenya’s move toward digital sound broadcasting reflects a broader global trend of modernizing radio infrastructure. By embracing DSB, the country aims to enhance listener experience, expand opportunities for broadcasters, and strengthen its digital economy.
