The studios in this building are broadcast studios but they are not as large as typical recording studios. They consist of booths where an announcer or DJ talks, and a small monitor room. There are four radio studios of BBC Radio 1-4.
There are not only studios - There is also a central control centre in this "Headquarters of BBC radio". It is the control area for the sound of radio as well as the sound of TV. The building is a central part of the BBC.
Of course, there is also a network room with local broadcasting stations, and the importance of this building can be inferred from it as well.
There is a small hall in the basement of the centre of the building built in early '30s. This hall has a excellent acoustics for classical music, and even now, it is used for recordings of small orchestras. The hall symbolises the British tradition - inheritance of good old quality.
There are four radio channels, the relation between AM and FM is puzzling.
The BBC has four radio channels, from Radio 1 to Radio 4. The output of Radio 1 covers the latest rock/pop music, Radio 2 covers easy listening and sports, Radio 3 covers classical music and dramas, and Radio 4 covers news and chats (it is called a talk show). Radio 1-4 have both AM radio frequencies and FM radio frequencies respectively, but the programs on AM and FM differ depending on the time of day so their relationship is a bit complicated. To make things more complicated, FM is called VHF, and AM is expressed by frequency and/or wavelength.
For example in case of Radio 1, as it has two mid-wavelength, it is expressed with frequency and/or wavelength as follows ; 1053kHz / 285m, and 1089kHz / 275m. FM is expressed like R1 / R2 88-91MHz.
Radio 3 and Radio 4 have the independent FM broadcasts, and they have educational programs called Open University in the morning and at night.. The Radio 1 and 2, in which the readers may have interest, share one FM radio wave; for example, they divide 24 hours broadcasting as follows; Radio 1 from 6:00a.m. to 5:00 p.m., Radio 2 from 5:00 p.m. to 10:00 p.m., and Radio 2 from 10:00p.m. to 5:00 a.m. As for AM broadcast, Radio 1-3 are using mid-wavelength and Radio 4 is using long-wavelength.