Peter Trojkovic was the sound engineer for the band his two brothers, Luke and Drago, formed in the 1970s. Peter soon expanded his duties to managing and securing the audio gear needed for live performances. Those tasks soon led to renting gear to other musicians and thus a Live Sound rental company was formed. Meanwhile, Luke was creating a retail side to their business and Drago was developing the wholesale division. Soon the three brothers had three companies, all of which were growing. When Luke announced his retirement, Peter and Drago sold the concert rental company to focus on wholesale. Peter and Drago also served on the Australian Music Association’s Board of Directors.