This is what we found on Wikipedia regarding the Liverpool Sound City:

Liverpool Sound City is an annual music festival and industry conference held in Liverpool, England. It was founded in 2008 by Dave Pichilingi. Sound City was located in Liverpool City Centre venues, such as The Kazimier, The Zanzibar and the Liverpool Cathedral, until 2015 when it was relocated to Bramley-Moore Dock in Liverpool's historic docklands.

In 2015, the festival took place on Friday 22 May through Sunday 24 May, with headliners The Vaccines, The Flaming Lips and Belle and Sebastian and several artists including, Everything Everything, Peace and The Cribs. Previous artists included Florence and the Machine, The Maccabees, The xx, The Kooks and Ed Sheeran.

The Sound City conference is a two-day digital industry conference with keynotes, in conversations and workshop sessions from key digital industry figures. In 2015, the conference took place on Thursday 21 May - Friday 22 May in the Titanic Hotel at Stanley Dock. Speakers included Wayne Coyne of The Flaming Lips, Ramones manager Danny Fields and Mark E. Smith of The Fall.