The International Conference Centre in Sydney can be reached by a full range of public transport options including Train, Ferry, Light Rail, Bus and private cars. Click on this link to see further details of each option and to find a downloadable map of the Darling Harbour precinct.
For specific information about travelling to the John Little Quartet Show at Sydney Boys High click this link
All travel on Sydney public transport is ticketless and requires all travellers to have an Opal Card pre-loaded with sufficient funds to cover the cost of the trip. For details on how and where you can obtain an Opal Card visit this link