The specialised radio station transmits thematic and specialised content for publics that are very segmented by the variety of content. Martí (2004: 33) considers that the specialised radio is the programming model defined by some mono-thematic content intended for a specific segment of the potential audience of the radio station that broadcasts it. Specialised radio is characterized by content sectorialisation and audience segmentation. Moreno (2004: 101) thinks it is appropriate to differentiate the terms of the formula and format in the mode of programming formula radio. Based on the studies made by Robert Todd Storz and MacFarland, Moreno discovered that during the 1960s in Spain the term radiofórmula was generalised to refer to thematic radio in general and in particular to the radio centred in the broadcast
of music. Based on these considerations, Moreno (2004: 101-102) defines formula radio as “the set of musical, informational, and entertainment content, and the manner in which they are combined to create the programming unit of the format. The formula is the smallest unit of programming, in content and duration, of the specialized radio. On the other hand, the format is the model of specialised programming that results of the schedule combination of the formula
during the 24-hours broadcast”