Rodger Hughes and Mallorca Lee formed Ultra-Sonic in the early 90s and becomes of Scotlands most successful dance acts. After signing a recording deal in 1991 with Scottish independent dance label Clubscene Records they released their first single, 'Obsession' and quickly became ones of the rave scene's biggest acts.

From 1991-1998 Ultra-Sonic released 14 singles, 4 studio albums, 1 live album and 2 full length tour videos.

Their albums sold over 50,000 copies in the UK alone (with pre-sale orders at 30,000) and around 400,000 in combined singles and albums in just under three years. The bands video sold 6,500 copies in four days, outselling Disney's 'The Jungle Book'.

Rodger and Mallorca disbanded in the late 90s after their final release 'The Hour Of Chaos'. Mallorca Lee continued producing under other various artist names including joining Public Domain for their most successful years. In the mid 2000s original member Rodger Hughes teamed up with new member Peter Coughlan to revive the Ultra-Sonic name.