Answer the question at the end by quoting:

Pendulum is an Australian drum and bass and electronic rock band founded in 2002. Pendulum originally formed in the city of Perth, Western Australia by Rob Swire, Gareth McGrillen, and Paul "El Hornet" Harding. The band was later expanded to include members, Ben Mount, Peredur ap Gwynedd, and KJ Sawka. Members Swire and McGrillen also formed the electro house duo Knife Party.
Pendulum once again toured Europe in 2009. During this tour they announced that they were working on their third studio album, Immersion. It was announced in December 2009 that Pendulum would be touring for their new album in May 2010. The release date of the album was announced to be sometime "in May" during the live preview party at Matter, and was then announced to be released on 24 May. Pendulum previewed their album Immersion at the Ear Storm night at London's Matter nightclub on Friday 22 January. "Salt in the Wounds", a track from their new album, was Zane Lowe's Hottest Record in the World on BBC Radio 1 on 25 January 2010. On Zane Lowe's show, it was also announced that he wanted to join the band and the first single from the new album would be called "Watercolour". This single also received its first play on Zane Lowe's BBC Radio 1 show on 8 March 2010, and was his Single of the Week for that week. In December 2010, "Watercolour" was found to be featured in the soundtrack of the 2010 hit game "Need for Speed: Hot Pursuit". On 1 April, the music video for "Salt in the Wounds" was released. The video is unique in that it is, according to the band's website, "...the world's first 360deg interactive music video."  "Watercolour" claimed the No.4 spot in the UK Singles Chart, making it their biggest hit to date. On 21 May 2010, the band headlined the annual Radio 1's Big Weekend festival which was held at the Vaynol Estate, Bangor, Gwynedd. The second single from the album, "Witchcraft", was released on 18 July and charted at No.29 in the UK Singles chart, making it their third highest charted single in the UK. The third single from Immersion was "The Island", and just missed the UK Top 40 at No. 41.  Rob Swire had stated that if it had achieved greater success than "Witchcraft", he would have released a song entitled "Ransom", which was taken off Immersion before the album's release. Swire revealed the original files for "Ransom" were corrupted, and that he has no plans to recreate them, therefore it will not be released. However, on 6 April 2011, Pendulum released "Ransom" as a single via their website with all proceeds going to the Help for Japan fund after the tsunami. "Crush" was released as the fourth single in January 2011. In January 2011, Pendulum released a Deluxe Edition of Immersion via iTunes which contained the album's original 15 tracks and a collection of remixes of "Watercolour", "Witchcraft" and "The Island" by other artists including deadmau5, Tiesto and Chuckie. Both the UK and US store were also given the music videos of those three tracks in the release.

What were some of the singles in the album?

Salt in the Wounds",



Answer the question at the end by quoting:

The Manchu (Manchu: manjU; Mollendorff: manju; Abkai: manju; simplified Chinese: Man Zu ; traditional Chinese: Man Zu ; pinyin: Manzu; Wade-Giles: Man3-tsu2) are an ethnic minority in China and the people from whom Manchuria derives its name. They are sometimes called "red-tasseled Manchus", a reference to the ornamentation on traditional Manchu hats. The Later Jin (1616-1636), and Qing dynasty (1636-1912) were established by Manchus, who are descended from the Jurchen people who earlier established the Jin dynasty (1115-1234) in China. Manchus form the largest branch of the Tungusic peoples and are distributed throughout China, forming the fourth largest ethnic group in the country.
Octagonal drum is a type of Manchu folk art that was very popular among bannermen, especially in Beijing. It is said that octagonal drum originated with the snare drum of the Eight-banner military and the melody was made by the banner soldiers who were on the way back home from victory in the battle of Jinchuan. The drum is composed of wood surrounded by bells. The drumhead is made by wyrmhide with tassels at the bottom. The colors of the tassels are yellow, white, red, and blue, which represent the four colors of the Eight Banners. When artists perform, they use their fingers to hit the drumhead and shake the drum to ring the bells. Traditionally, octagonal drum is performed by three people. One is the harpist; one is the clown who is responsible for harlequinade; and the third is the singer.  "Zidishu" is the main libretto of octagonal drum and can be traced back to a type of traditional folk music called the "Manchu Rhythm". Although Zidishu was not created by Han Chinese, it still contains many themes from Chinese stories, such as Romance of the Three Kingdoms, Dream of the Red Chamber, Romance of the West Chamber, Legend of the White Snake and Strange Stories from a Chinese Studio. Additionally, there are many works that depict the lives of Bannermen. Aisin Gioro Yigeng, who was pen named "Helu" and wrote the sigh of old imperial bodyguard, as the representative author. Zidishu involves two acts of singing, which are called dongcheng and xicheng.  After the fall of the Qing dynasty, the influence of the octagonal drum gradually reduced. However, the Chinese monochord and crosstalk which derived from octagonal are still popular in Chinese society and the new generations. Many famous Chinese monochord performers and crosstalkers were the artists of octagonal drum, such as De Shoushan and Zhang Sanlu.

What is the octagonal drum called?
Octagonal drum is a type of Manchu folk art that was very popular among bannermen, especially in Beijing.