A-Trak, Salem and Flying Lotus are also additions to the events in Barcelona, A Coruna and Tokyo.
The central festival in Barcelona has received the biggest batch of new names so far. In addition to previously announced headliners Steve Reich and Magnetic Man, the three-day event will feature a headlining set from the almighty Underworld. Swedish Peacefrog outfit Little Dragon have also been confirmed, along with A-Trak, Salem and Warp Records newcomer Tyondai Braxton. Both Salem and Underworld will both appear at Sonar Galicia in A Coruna as well.
Meanwhile, the bill for SonarSound Tokyo is shaping up to be a bit more left-field. Flying Lotus and Kode9 have both been confirmed, as have post-rock heavyweights Battles and Seefeel, plus Tokyo's own DJ Krush and the spastic sounds of DJ Scotch Egg.
Mar 19 A Taste of Sonar, The Roundhouse, London Apr 02 Sonar Tokyo - Day 1, ageHa, Tokyo Jun 16 Sonar By Day 2011 - Thursday, CCCB, Barcelona Jun 16 Sonar 2011 Opening Night, L'Auditori, Barcelona Jun 17 Sonar By Night 2011 - Friday, Fira Gran Via, Barcelona Jun 17 Sonar By Day 2011 - Friday, CCCB, Barcelona Jun 18 Sonar By Day 2011 - Saturday, CCCB, Barcelona