HARD ROCK This is the format for rock fans who like to feel their music loud, somewhere up past mark 11 on the volume control! From Black Sabbath to Metallica; Led Zeppelin to Foo Fighters; Van Halen to Tool. Sizzling guitars and thumping drums, often augmented by powerful blasts on Korg Keyboards. There are at least a few hundred hard rock stations online and at least two on the FM dial. Hard Rock has spun off its own sub-genres; Jam, Prog / Art Rock and Psychedelic to name but a few.
HEAVY METAL A very popular sub-genre of Metal, (see below) Heavy Metal now has around 60 online radio stations and two FM outlets playing the sub-genre. Heavy Metal has its origins in blues and includes artistes such as Led Zeppelin, Iron Butterfly, Blue Cheer, Black Sabbath and Deep Purple.
Hip hop music is often called rap music. It is a music genre of very stylised rhythmic music over which artistes usually chant. Hip-Hop is a sub-culture which incorporates beatboxing (making instrumental sounds with the mouth into a microphone) and MCing as well as occasionally graffiti painting while doing so!
HOLIDAY An alternative name for the format of playing predominantly Christmas music, usually as a temporary format aimed at shop or restaurant operators to run up to the Christmas holidays.
HOT (ADULT) AC There are now several different versions of Hot AC in use. It originally meant stations playing current hit music that is more energetic or upbeat than the average Adult Contemporary station, but over the last five years has increasingly meant stations that play a larger proportion of the very latest releases. Billboard's Adult Top 40 chart includes new releases played on rock oriented CHR stations as well as Hot AC stations.
HOUSE A sub-genre of electronic dance music that has heavy bass chords and its origins in Chicago. The sound has repetitive 4/4 beats, lots of off-beat hi-hats and urgent pounding basslines. The style was popularised by MARRS, S Express, Grandmaster Flash and Sylvester, who each had huge hits in many countries with the genre. Its popularity continues with the likes of Robin Schulz and Duke Dumont and there are several dozen house music based radio stations around the world.