The Impossible Music Festival was a recurring event broadcast on Australia's Triple J radio station over 55-hour periods in 2005, 2006, 2007 and 2008. Each event comprised 55 live music recordings from Triple J's music archives. The first went to air over 26–29 August 2005, to celebrate the 30 years worth of live music recorded by Triple J. The second was broadcast over 6–9 October 2006. The third was aired over 25–27 May 2007. The fourth and most recent was aired across 19–21 September 2008. The lineup was selected by Triple J listeners voting for over 1000 live recordings made by Triple J. The recordings included music from festivals, concerts, smaller pub gigs, bands playing live in the studio, and some special events where listeners were able to win tickets to see the band for free in a secret location.

2005

One live set was played every hour between 6pm on Friday 26th, and 1am on Monday 29 August. The following is the order in which the broadcasts went to air; the details in the brackets denotes the location and date in which the live recording was made.

Lineup

Friday

Saturday

Sunday

Monday

Announcers

2006

The 2006 Impossible Music Festival was broadcast over the weekend of 6 October-8 October.

Lineup

Friday

Saturday

Sunday

Monday

Announcers

2007

The 2007 Impossible Music Festival was broadcast over the weekend of 25 May-27 May.

Lineup

Friday

Saturday

Sunday

Monday

Announcers

2008

The 2008 Impossible Music Festival was broadcast over the weekend of 19 September-21 September.

Lineup

Friday

Saturday

Sunday

Announcers

2009

There was no Impossible Music Festival in 2009 due to the Hottest 100 of All Time.

2010

Triple J asked their listeners who their favourite live acts ever are, this is the result: