Question: Tame Impala and Letters to Cleo, are both musical bands of which type?
Context: Tame Impala is the second EP by Australian psychedelic rock band Tame Impala.  It reached number 1 on the Australian Independent Record Labels (AIR) Chart and number 10 on the ARIA Physical Singles Chart.  Three singles were released from the EP: "Desire Be, Desire Go", "Half Full Glass of Wine" and "Skeleton Tiger".  All three received national radio airplay on the Triple J network. Cam Avery (born 21 April 1988) is an Australian multi-instrumentalist, musician, singer and songwriter.  He is best known as a member of the bands Pond and Tame Impala, and as the frontman for The Growl. Tame Impala ( ) is an Australian psychedelic rock band founded by Kevin Parker in 2007.  The group began as a home recording project for Parker, who writes, records, performs, and produces the music.  As a touring act, the project consists of Parker (guitar, vocals), Jay Watson (synthesiser, vocals, guitar), Dominic Simper (guitar, synthesiser), Cam Avery (bass guitar, vocals), and Julien Barbagallo (drums, vocals).  Previously signed to Modular Recordings, Tame Impala is signed to Interscope Records in the US, and Fiction Records in the UK. Letters to Cleo are an alternative rock band from Boston, Massachusetts, best known for the 1994 single, "Here & Now", from their full-length debut album, "Aurora Gory Alice".  The band's members are Kay Hanley, Greg McKenna, Michael Eisenstein, Stacy Jones, Scott Riebling, and later, Tom Polce. Koi Child is an Australian hip-hop band from Fremantle, Perth, Australia.  They formed in 2014 through the combination of two bands; Kashikoi and Child's Play.  Their self-titled debut album was recorded, mixed and co-produced by Kevin Parker of Tame Impala and was released in March 2016. Julian Fulton is an American songwriter and multi-instrumentalist from New Jersey.  He is known for incorporating multiple musical styles into a unique brand of indie rock.  When performing or recording with a full band, Fulton and fellow musicians are known as Julian Fulton and the Zombie Gospel.  Fulton has been compared to acts like The Beatles, Beck, Grizzly Bear (band), Wilco, The Beach Boys, Tame Impala, and many others. Kevin Richard Parker (born 20 January 1986) is an Australian singer, songwriter, multi-instrumentalist and record producer, best known for being the frontman and live guitarist of the Australian psychedelic rock band Tame Impala, for which he writes, records, and produces the music.  At the ARIA Music Awards of 2015 he won two awards, Engineer of the Year and Producer of the Year, for his work on Tame Impala's "Currents" (2015). Jay Watson (born 27 May 1990) is an Australian multi-instrumentalist, singer and songwriter.  He is best known as a member of the psychedelic rock bands Tame Impala and Pond.  Watson records solo material under the name GUM and has released three albums under this name. David Lawrence "Dave" Fridmann is an American record producer and musician.  From 1990 onwards he co-produced most releases by Mercury Rev and The Flaming Lips.  Other bands he has worked with include Weezer, Saxon Shore, Neon Indian, Wolf Gang, Ammonia, Ed Harcourt, Sparklehorse, Café Tacuba, Elf Power, Mogwai, Thursday, Mass of the Fermenting Dregs, The Delgados, Low, Phantom Planet, Gemma Hayes, Goldrush, Tapes 'n Tapes, Hopewell, Black Moth Super Rainbow, Number Girl, Jed Davis, Zazen Boys, Sleater-Kinney and Clap Your Hands Say Yeah.  He has recently worked on new recordings with MGMT, Neil Finn, The Cribs, OK Go, Tame Impala, Baroness and Spoon. Estéreo Picnic is a music festival that takes place annually in Bogotá, Colombia.  It began in 2010 as a one-day festival showcasing mainly Colombian artists, but low turnout and financial losses during its first three years resulted in a strategic change of direction in 2013, becoming a multi-day festival on a bigger site and inviting major international bands to play alongside artists from Colombia and other Latin American countries.  As a result attendance increased markedly and Estéreo Picnic is now Colombia's biggest alternative music festival and one of the most important music festivals in South America.  The musical style of the festival is similar to that of Lollapalooza and European festivals such as Glastonbury, focusing on alternative rock, indie music, punk rock, reggae, electronica and hip hop.  Among the acts to have played at Estéreo Picnic since 2013 are American artists The Killers, Red Hot Chili Peppers, Pixies, Nine Inch Nails, Kings of Leon, Jack White and Snoop Dogg, British groups New Order, Foals, Kasabian, Mumford & Sons and Florence and the Machine, and Australian bands Empire of the Sun and Tame Impala.  The festival has also featured many of the major groups of the Latin American alternative music scene, including Calle 13, Babasónicos, Café Tacuba, Los Fabulosos Cadillacs and Aterciopelados, as well as sets from high-profile DJs and dance acts such as Tiësto, Skrillex, Major Lazer and Calvin Harris.
Answer: rock