Question: Are Mikael Åkerfeldt and Lee Ranaldo both lead vocalist?

Context articles: Martín Méndez
The Fathomless Mastery
Clouds (Lee Ranaldo album)
The Roundhouse Tapes
Storm Corrosion
Opeth
Lee Ranaldo
Last Night on Earth (Lee Ranaldo album)
Mikael Åkerfeldt
Sörskogen

Martín Méndez (born April 6, 1978 in Montevideo, Uruguay) is the bass guitar player of progressive death metal band Opeth and second most constant member of the band, behind lead vocalist, songwriter and guitarist Mikael Åkerfeldt.
The Fathomless Mastery is the third full-length album by Swedish death metal band Bloodbath.
 Former Scar Symmetry vocalist Christian Älvestam performed guest vocals on the sixth track, "Iesous".
 The outro of the final track, "Wretched Human Mirror", features samples from the movie "I Am Legend".
 A video was made for "Hades Rising", directed by Owe Lingwall and shot on location in Vallentuna, near Stockholm.
 The album peaked at No. 45 on the Heatseekers Chart in the US on release.
 The album was reissued in 2011, bundled together with the tracks from the "Unblessing the Purity" EP released in 2008.
 "The Fathomless Mastery" is the last studio album with vocalist Mikael Åkerfeldt and the first to feature lead guitarist Per Eriksson.
Clouds is an album by Sonic Youth guitarist/vocalist Lee Ranaldo.
 The album is a reworked recording of the concert performed by Ranaldo & William Hooker at the 1997 edition of the Festival International de Musique Actuelle de Victoriaville.
The Roundhouse Tapes is a live double album by Swedish progressive metal band Opeth.
 The CD was recorded on November 9, 2006, and was released on November 5, 2007, in Europe, and on November 20, 2007, in the rest of the world.
 A two disc DVD version was released on November 10, 2008, and includes exclusive menu music written by Mikael Åkerfeldt and Per Wiberg.
 The title is a play on the name of Iron Maiden's first release "The Soundhouse Tapes", as well as the venue where the record was recorded.
 Åkerfeldt said, "The Roundhouse concert will always be a very memorable gig for us for many reasons, but most importantly it caught the band at the peak of the "Ghost Reveries" tour".
Storm Corrosion was a musical collaboration between Mikael Åkerfeldt of Swedish progressive metal band Opeth and Steven Wilson, an English solo artist and frontman of the progressive rock band Porcupine Tree.
 Åkerfeldt and Wilson began a longstanding musical partnership in 2001 when Wilson produced Opeth's fifth studio album "Blackwater Park".
 The two began writing together for a new project in 2010, releasing their self-titled first studio album on May 8, 2012 through Roadrunner Records.
Opeth is a Swedish heavy metal band from Stockholm, formed in 1989.
 The group has been through several personnel changes, but lead vocalist, guitarist and songwriter Mikael Åkerfeldt has remained Opeth's primary driving force throughout the years.
 Opeth has consistently incorporated progressive, folk, blues, classical and jazz influences into its usually lengthy compositions, as well as strong influences from death metal, especially in their early works.
 Many songs include acoustic guitar passages and strong dynamic shifts, as well as both death growls and clean vocals.
 Opeth is also well known for their incorporation of Mellotrons in their work.
 Opeth rarely made live appearances supporting their first four albums; but since conducting their first world tour after the 2001 release of "Blackwater Park", they have led several major world tours.
Lee Mark Ranaldo (born February 3, 1956) is an American musician, singer-songwriter, guitarist, writer, visual artist and record producer, best known as a co-founder of the alternative rock band Sonic Youth.
 In 2004, "Rolling Stone" ranked Ranaldo at number 33 on its "Greatest Guitarists of All Time" list.
 In May 2012, "Spin" published a staff selected top 100 guitarist list, ranking Ranaldo and his Sonic Youth bandmate Thurston Moore together at number 1.
Last Night on Earth is the tenth studio album by the American alternative rock musician Lee Ranaldo, released on October 7, 2013 on Matador Records.
 Recorded over a nine-month period at Echo Canyon West in Hoboken, New Jersey, the album features Ranaldo's backing band The Dust which comprises former Sonic Youth bandmate Steve Shelley, guitarist Alan Licht and bassist Tim Lüntzel.
 In addition to studio recordings, "Last Night on Earth" incorporates field recordings of Ranaldo in Berlin, Germany and Valeggio sul Mincio, Italy.
Lars Mikael Åkerfeldt (born 17 April 1974) is a Swedish musician, prominently known as the lead vocalist, guitarist, and primary songwriter of progressive death metal band Opeth, as well as being the former vocalist of death metal supergroup Bloodbath.
 He was also guitarist for the "one-off" band Steel, and is part of the collaboration Storm Corrosion with Steven Wilson.
Sörskogen was a Swedish progressive rock project Mikael Åkerfeldt of Opeth and Dan Swanö started for fun.
 Both musicians are known for their wide musical interests.
 The project was supposedly named after a small community near the Stockholm suburb Huddinge where Mikael practiced with his first band Eruption in the late 1980s.
 At the Opeth concert on December 18, 2008, Mikael Åkerfeldt claimed to have played soccer for the Sörskogen IF soccer club.
 Sörskogen is heavily influenced by 1970s prog rock bands, Camel to name but one.
 Not much is known about the project, except a few references made by Mikael in interviews.