Originally, their music was entirely composed on a small portable MIDI sequencer, a Yamaha QY70, which has often been mistaken for a Game Boy. On more recent albums, they have expanded their toolkit due to a lack of variety in the sounds the QY70 provided, but it still remains an important part of the composing process. The release of Future Future Future Perfect only features the QY70 in a single song, that being "Pop Music Is Not a Crime".
Freezepop performing at the Cambridge
River Festival on June 18, 2005
In addition to Freezepop, Kasson, who had previously been in fellow Boston band Splashdown, still records as a solo artist Symbion Project. Drinkwater is also a member of the bands Lifestyle and Karacter, and worked with the band Polystar on their debut album. Enthusiasm appears on the song "Boom Box Chic" by Los Angeles-based LeMans Electro.
In addition to dozens of remixes released over the years, Freezepop released a remix of their song "Shark Attack" done by chiptune band 8 Bit Weapon in October 2007. The remix was done with a Nintendo Entertainment System and a Commodore 64 computer. Robotkid also used a similar approach in his Lameboy mix of "Science Genius Girl" that featured the Game Boy audio software Little Sound DJ.
A recurring theme in Freezepop's music is references to science, technology, and mathematics. As examples, the "hi-phive" mix of "Science Genius Girl" features Enthusiasm reciting the first thirty digits of Phi. Additionally, the "Robotron 2002" "All Your Base Are Belong to Us" remix by DJ Nebula pays homage to the Internet meme All your base are belong to us.
Freezepop was arrested in Canada in November 2006 for trying to enter the country under false pretenses. Harmonix pokes fun at them for this in the loading screens for their songs, in Rock Band and Rock Band 2.
On June 4, 2009, it was announced on Freezepop's official website that founding member the Duke of Pannekoeken (originally the Duke of Candied Apples, as well as the Duke of Belgian Waffles, all three pseudonyms of Crooker) would be leaving the band. Crooker stated, "My responsibilities at Harmonix making games continue to increase which takes away from my time and energy to compose and go out on the road to play shows." He also added that he had plans to focus on his side endeavor Symbion Project while also doing Freezepop remixes in the future. His last show as a member of the band was at the Penny Arcade Expo 2009 in Seattle on September 5.
On November 25, 2009, the band announced the addition of two new members: Robert John "Bananas" Foster and Christmas Disco-Marie Sagan.
On April 25, 2016, the band launched a Kickstarter crowdfunding campaign to raise money for a fifth studio album to follow Imaginary Friends (2010). They posted a video, along with a photo of a royalty check of $2.93 that they received for online music streaming services. The band's initial goal was US $30,000, which was reached in less than 24 hours. Their next goal of $40,000 was reached, which allowed the band to also release the album on vinyl. More stretch goals have been set for additional content, such as collaborations and a remix album. They are currently finishing the album.
Along with bands such as The Aquabats, Bad Credit, and Slowdraw the Hungry Eskimo, their music is featured in the comedy series Mega64, which also produced the music video for Freezepop's song "Brainpower".
Freezepop's song "Swimming Pool" was featured in the episode "Liquid Heat" in the fifth season of The L Word, originally aired March 2, 2008. "Frontload" was featured in the final episode of the fourth season of MTV's The Hills, which originally aired on December 22, 2008. In 2010. their song "Less Talk, More Rokk" was featured in The Fourth Panel, a web TV series from the webcomic Penny Arcade.