The service overlaps with local-level DAB multiplexes centred on particular cities and towns (such as Score Glasgow and Score Edinburgh), meaning that listeners in central Scotland are able to tune into three levels of coverage - national, regional and local services.
Many of the DAB-only stations are relays of programmes from other areas: Gold, Xfm and Heart originate in London and Kerrang!
After the Saga-Smooth changeover, Smooth London on the regional multiplex gave way to a relay of Glasgow's Smooth, and the ex-Saga slot on the local multiplexes was used by the GMG-owned jazzfm.com; in Glasgow this later became the new Jazz FM (UK), but in Edinburgh this slot was then used to relay another GMG-owned Glasgow-based station, 96.3 Rock Radio, instead.
Two more recent changes to services on this multiplex had both been actioned by Global Radio: the removal of rock station The Arrow in favour of a relay of the London version of Gold, and the relaunch of Xfm Scotland as Galaxy (which resulted in a change to the DAB arrangement, which had been carrying Xfm Scotland and Yorkshire-based Galaxy Digital, and changed to carrying Xfm London and Galaxy Scotland).
The ultimate aim of these changes appears to be to continue carriage of the Glasgow-area local FM franchises of Real XS and Smooth to the Glasgow DAB multiplex, whilst providing listeners in Edinburgh and elsewhere with access to the network versions of the stations.