In the example here the Main Studio is the primary and there are two secondary computers, all running PlayoutONE. One secondary is for FM specific content like spots, promotions and production. The other secondary is the same but for DAB. The black dotted line shows commands being fed to the secondary from the primary.
The red dotted line indicates the audio feed. The Main Studio, would supply the main, non-split audio, like the presenter and the music, but when it’s time for the split content, it would simply wait until the FM and DAB content has completed. It would then pick up seamlessly and all audio would be mixed at the point of distribution.