Eric A. "Doc" Hammer is an American musician, actor, film and television writer, voice actor, and painter.
 He performed in the gothic rock bands Requiem in White from 1985 to 1995 and Mors Syphilitica from 1995 to 2002, both with his then-wife Lisa Hammer.
 His film credits include a number of Lisa's projects—released through their own production company Blessed Elysium—in which he participated as a writer, actor, composer, designer, and visual effects artist.
 He also composed the music for the 1997 film "A, B, C..
.
 Manhattan".
 He and Christopher McCulloch are the co-creators, writers, and editors of the animated television series "The Venture Bros." (2004–present), in which Hammer voices several recurring characters including Billy Quizboy, Henchman 21, Doctor Girlfriend, and Dermott Fictel.
 The show is produced through Hammer and McCulloch's company Astro-Base Go.
 Hammer is also the singer, guitarist, and songwriter of the band Weep, which formed in 2008.
Within the broad movement of new-age music, neoclassical new-age music is influenced by and sometimes also based upon early, baroque or classical music, especially in terms of melody and composition.
 The artist may offer a modern arrangement of a work by an established composer or combine elements from classical styles with modern elements to produce original compositions.
 Many artists within this subgenre are classically trained musicians.
 Although there is a wide variety of individual styles, neoclassical new-age music is generally melodic, harmonic, and instrumental, using both traditional musical instruments as well as electronic instruments.
 Similar neoclassical elements can often be found within other genres besides new-age music, including electronic music, minimalist music, post-rock music and neoclassical dark wave music.
Black Tape for a Blue Girl (often stylized as black tape for a blue girl) is an American dark wave band formed in 1986 by Projekt Records' founder Sam Rosenthal.
 Their music takes on elements of dark wave, ethereal, ambient, neoclassical, and dark cabaret music.
 Director David Lynch is one of their more well-known fans.
 Their 11th album, "These Fleeting Moments", was released on August 12, 2016.
 on Metropolis Records.
Medieval folk rock, medieval rock or medieval folk is a musical subgenre that emerged in the early 1970s in England and Germany which combined elements of early music with rock music.
 It grew out of the British folk rock and progressive folk movements of the later 1960s.
 Despite the name, the term was used indiscriminately to categorise performers who incorporated elements of medieval, renaissance and baroque music into their work and sometimes to describe groups who used few, or no, electric instruments.
 This subgenre reached its height towards the middle of the 1970s when it achieved some mainstream success in Britain, but within a few years most groups had either disbanded, or were absorbed into the wider movements of progressive folk and progressive rock.
 Nevertheless, the genre had a considerable impact within progressive rock where early music and medievalism in general, was a major influence and through that in the development of heavy metal.
 More recently medieval folk rock has revived in popularity along with other forms of medieval inspired music such as Dark Wave orientated neo-Medieval music and medieval metal.
Dark wave (or darkwave) emerged as a dark form of new wave and post-punk music combining elements of gothic rock and synth-pop.
 The label began to appear in the late 1970s in German music media, coinciding with the popularity of new wave and post-punk.
 Building on those basic principles, dark wave is used to describe dark, introspective lyrics and an undertone of sorrow for some bands.
 In the 1980s, a subculture developed primarily in Europe alongside dark wave music, whose members were called "wavers" or "dark wavers".
Synthwave (or electro-wave) is an electronic, synthesizer-based variant of new wave and dark wave music in contrast to the more guitar-oriented variants of these genres (see cold wave and gothic rock).
Lisa Hammer (née Houle; born April 4, 1967 in Salem, Massachusetts, U.S.) is an American filmmaker, actress, composer and singer and is the sister of director James Merendino ("SLC Punk!
").
 She graduated from Emerson College, with a BS in Film.
 She founded the Blessed Elysium Motion Picture Company, which produces German Expressionist films.
 Such works include "Pus$bucket" and "Crawley", a collaboration with Ben Edlund and Doc Hammer, her ex-husband.
 She has also contributed to "Joanie4Jackie", a film anthology project run by Miranda July, which featured Hammer's film "Empire of Ache" starring Dame Darcy.
Mors Syphilitica was a gothic rock/ethereal band formed in 1995 in New York City by Lisa Hammer ("née" Houle) and Eric Hammer after the breakup of their prior band Requiem in White.
 Their music combined often-surreal lyrics with unusual instruments such as mandolin and banjo, as well more conventional instruments like guitar.
 Lisa Hammer's operatic vocals gave Mors Syphilitica's music a distinctive powerful, sweeping quality.
 On record, all of the instruments were played by Eric Hammer; in concert, they were accompanied by live drummers and bass players.
Neoclassical dark wave refers to a subgenre of dark wave music that is characterized by an ethereal atmosphere and angelic female voices but also adds strong influences from classical music.
 Neoclassical dark wave is distinct from the art music form known as neoclassical music, a style of classical music dating from the early twentieth century.
 In the context of popular music, the term 'neoclassical' is frequently used to refer to music influenced by classical (including elements from the baroque, classical, romantic, impressionistic music).
Ethereal wave, also called ethereal darkwave, ethereal goth or simply ethereal, is a subgenre of dark wave music and is variously described as "gothic", "romantic", and "otherworldly".
 Developed in the early 1980s in the UK as an outgrowth of gothic rock, ethereal was mainly represented by 4AD bands such as Cocteau Twins and early guitar-driven Dead Can Dance.

Question: Which subgenre of dark wave music was performed by the and formed by Lisa Hammer ("née" Houle) and Eric Hammer?
Answer: ethereal