singer in addition to playing a Ztar – a guitar-like MIDI controller – during live performances. After the band's first tour they started work on a second album, In Silico, for which Swire featured as the main vocalist, after already appearing on tracks such as "Spiral", "Hold Your Colour", "Streamline", and "Still Grey" in order to keep a consistent sound. In addition, he continued his former roles of writer and producer, although he delegated the task of vocal mixing to a professional mixing engineer. Swire was also extensively involved in creating publicity material for the new album, as he explained during an interview with Lucy Chakaodza of The Independent. Pendulum released their third album titled Immersion in the UK on 24 May 2010. This is Pendulum's only number one album, topping the UK Albums Chart. Pendulum announced on 19 June 2012 that they had split. Swire stated, "We're having too much fun with the Knife Party project. It's also great because Pendulum, towards the end, sort of felt like we were doing it because we had to, and that's never a fun way to do music. Whereas Knife Party is pretty much solely us doing what we want to and if no one likes it we don't care." This can be equated to Rob Swire feeling limited to a genre under the band Pendulum, and he has stated publicly over tweets that he hates the restriction that a fan base can bring, he does enjoy continuing to produce music. On 22 August 2013, Swire revealed that a new Pendulum album will probably be released sometime in 2014. Despite this, Swire ruled out the possibility of Pendulum performing live again. However, Pendulum reunited at the 2016 Ultra Music Festival in Miami, Florida. On 9 January 2017, Pendulum confirmed to be reuniting for a world tour and possibly releasing a new album, with Swire also returning. They performed live at several music festivals internationally throughout 2017. On 29 June 2018, Pendulum's album, aptly titled "The Reworks" was released, composed solely of remixes from artists such as Skrillex, Moby, Pegboard Nerds, Noisia and the Knife Party alias. Remixes from Noisia, Knife Party, Icarus and Skrillex were released as singles beforehand. On 17 September 2020, Pendulum released two singles "Driver" and "Nothing for Free", making this the first new material in ten years since Immersion. A music video for "Nothing for Free" was produced,