Until the early 1990s, FM adoption in the UK was relatively low, so it was common practice amongst stations to simulcast their programming on both AM and FM frequencies. Starting in the late 1980s, the UK government and the IBA required that ILR and BBC stations cease simulcasting and provide separate services on their AM and FM frequencies. This change occurred at Swansea Sound in 1995. Their FM frequency became a CHR (contemporary hit radio) station called "96.4 Sound Wave" (now 96.4 The Wave), while "Swansea Sound" continued to broadcast as normal on 1170 AM.