I first annalysed Radio 1s, Annie Mac's Mash ups show. The beggining jingle to the show uses quite funky beats and sounds quite cool. It also has sound effects which say her name in a robot sort voice.This represents the genre of the show which is dance/electro music. The jingle then leads into the first song of the show. This type of show is aimed at younger age group, you can tell because of the types of tune they use to represent the show and the type of music they play. She doesnt really do any interviews in the show and mostly introudeces music due to the fact its a music show.
http://www.bbc.co.uk/iplayer/episode/b00gknyq/Annie_Macs_Mash_Up_16_01_2009/

The next show i annalysed was 1xtras breakfast show. This is also aimed at the younger age group. It starts off with a mix up of different songs with trevor nelson and gemma the hosts speaking over it introducing the show. A sound effect has been put on to thier voices to make them echo and they also repeat "1xtra breakfast show" many times. It includes a few beeps, which then leads into the first song which is Kardinall Offshall - Number 1, this indicates that they play hip/hop/ R'n'B music and is music which would appeal to people in the younger generation. The codes and conventions are similar to annie macs mash up show, which includes a jingle introducing the show and the first song being played. This seems to be the typical codes and conventions of a music radio show.
http://www.bbc.co.uk/iplayer/episode/b00gqpqd/1Xtra_Breakfast_with_Trevor_Nelson_and_Gemma_19_01_2009/

In comparison on radio 2's Alan Titchmarsh's show includes a lot more talking and seems to be aimed at the older age group. You can tell this due to the different type of music that is played. The music tends to be more classical and something that would appeal to the certain age group. It starts off with him being introduced, the jingle is someone singing the number of the station which his show is on and then singing his name. The tune to the jingle uses a lot more softer beats to the other shows which suggest it plays more calm music. It finishes off with someone singing "bbc radio 2!" and alan introduces the first song which is classical music.

http://www.bbc.co.uk/iplayer/episode/b00gr517/Alan_Titchmarsh_with_Melodies_for_You_18_01_2009/