The Melody Web what each genre heard, and what it passed on

heard passed on Click or tap a node to recenter. Use a connecting line, or Influence, for the story.

Heard

Blues genre · 1860–

Early metal players have blues hands: pentatonic boxes, bent notes, call-and-response licks, and a guitar-hero role learned from electric blues and hard rock.

Influence
Hard rock style · 1968–

Metal inherits hard rock’s working unit — distorted guitars, bass lock, kit, high volume, and the public guitar solo — then changes what a song is made of.

Influence
Rock genre · 1964–

Metal keeps rock’s long-term working language: the amplified quartet, the album as the unit, backbeat residue, and the FM/festival economy.

Influence

Heavy metal

genre · 1970–

Also called metal, heavy metal music

Includes Black metal, Death metal, Doom metal, Glam metal, Gothic metal, Groove metal, Industrial metal, Neoclassical metal, New Wave of British Heavy Metal, Nu metal, Post-metal, Power metal, Progressive metal, Speed metal, Symphonic metal, Thrash metal

A named loud-guitar genre that crystallizes around 1970 when a wing of hard rock stops treating the blues song as the default: riffs become the form, power chords and modal/tritone harmony carry the tune, and distortion, down-tuning, and industrial or occult affect are structural rather than color (Cope, Walser, Weinstein). Black Sabbath’s first records are the usual founding case; Judas Priest and the later British wave make the name and the look durable. It is its own genre — like reggae or hip-hop, not a style of rock the way Hard rock is. Rock and hard rock are donors. It is not a synonym for all hard rock and not a bin for every later extreme style.

Listen

  1. Black Sabbath Black Sabbath (1970) YouTube · Spotify · Amazon
  2. Paranoid Black Sabbath (1970) YouTube · Spotify · Amazon
  3. Iron Man Black Sabbath (1970) YouTube · Spotify · Amazon
  4. War Pigs Black Sabbath (1970) YouTube · Spotify · Amazon
  5. Children of the Grave Black Sabbath (1971) YouTube · Spotify · Amazon
  6. Symptom of the Universe Black Sabbath (1975) YouTube · Spotify · Amazon
  7. Sabbath Bloody Sabbath Black Sabbath (1973) YouTube · Spotify · Amazon
  8. Into the Void Black Sabbath (1971) YouTube · Spotify · Amazon
  9. Fairies Wear Boots Black Sabbath (1970) YouTube · Spotify · Amazon
  10. Heaven and Hell Black Sabbath (1980) YouTube · Spotify

Passed on

Doom metal style · 1984–

Doom is the 1970 metal object kept as a tradition: riff-as-form, tritone and modal harmony, down-tuned mass, half-time groove.

Influence
Glam metal style · 1981–1992

Glam metal keeps the parent’s working unit — distorted guitars, high male (and later mixed) vocals, the solo as a display, and the word metal as a scene name — and puts it on a ra…

Influence
Grunge genre · 1986–1996

Grunge borrows metal’s riff-as-weight: down-tuned or muddy power chords, occasional tritone/Aeolian color, and Sabbath as homework.

Influence
Industrial metal style · 1988–

Industrial metal keeps metal’s guitar-riff band and high-gain public and replaces the live-kit default with machine pulse and samples.

Influence
Neoclassical metal style · 1984–

Neoclassical metal keeps the umbrella’s working unit — distorted guitars, metal rhythm section, public guitar hero — and spends it on sequence and caprice.

Influence
New Wave of British Heavy Metal style · 1979–1983

NWOBHM is the parent genre doing a second British job: same riff-and-gain unit, more speed, tighter songs, and a youth press after punk.

Influence
Post-metal style · 1996–

Post-metal keeps metal’s guitar-and-kit unit and high-gain public and spends them on long dynamic forms.

Influence
Power metal style · 1985–

Power metal keeps the umbrella’s high-vocal, twin-guitar, theatrical craft — Priest more than Sabbath — and writes it as bright speed anthems.

Influence
Progressive metal style · 1986–

Prog-metal keeps the umbrella’s working unit and the public guitar/drum virtuoso, then spends that craft on long form and odd meter.

Influence
Speed metal style · 1982–1987

Speed metal takes the 1970s metal twin-guitar unit, high vocal, and riff song and runs them at gallop and double-kick tempo without hardcore’s bark.

Influence

Blues → Heavy metal

harmonymelodyphrase and lickstrength: mediumwell documented1969–1975recordingoral

Mechanism

Early metal players have blues hands: pentatonic boxes, bent notes, call-and-response licks, and a guitar-hero role learned from electric blues and hard rock. That inheritance is audible on Sabbath and Priest even when the song is a modal riff cycle rather than a 12-bar. Strength is medium: the target’s definitional move (Cope) is to drop shuffle, 12-bar circulation, and blues-cadence form. Blues explains the fingers, not the 1970 compositional object.

Evidence

Sabbath’s first records still use pentatonic melody and blues-rock timbre; some early-1970s metal tracks retain a 12-bar or blues-turnaround wing. The British blues boom is the mediator, not a second parent genre. Later children (thrash, death, black) often thin this residue further.

Debate

Popular histories say metal “is” loud blues. Cope treats that as the claim the founding records refute. Both can be true at different layers: lick and pitch language versus form and harmony. This edge keeps the audible layer and refuses to make blues definitional of the umbrella. Classical/virtuoso rhetoric (Walser) is a later metal-internal resource, not a substitute parent here.

Mediators

artist: Black Sabbath; community: British blues boom

Hard rock → Heavy metal

instrumentationtimbre and productionphrase and lickperformance practicestrength: highscholarly consensus1969–1974recordingoral

Mechanism

Metal inherits hard rock’s working unit — distorted guitars, bass lock, kit, high volume, and the public guitar solo — then changes what a song is made of. The riff is no longer an intro to a blues or pop chorus; it is the piece. Gain and down-tuning become harmonic facts. The same Midlands and U.S. circuit that booked loud rock books the first metal bands. Strength high: without hard rock there is no ensemble or timbre to recode.

Evidence

Sabbath’s personnel and first-album production sit in the 1969–71 hard-rock world; Cope’s analyses show the compositional break (modal/tritone riffs, dropped shuffle and 12-bar). Priest and the later British wave keep the hard-rock stagecraft (twins leads, leather, festival) after the song grammar has shifted. Weinstein treats the fan culture as distinct once the name sticks.

Debate

Journalism still files Zeppelin and Purple as metal. This corpus follows Cope and Weinstein: those catalogs remain hard rock unless a later cover or scene actually recodes them. The boundary is real and contested in popular use; the Debate is about labeling, not about whether Sabbath had hard-rock neighbors.

Mediators

artist: Black Sabbath; artist: Judas Priest

Rock → Heavy metal

instrumentationform and structuretimbre and productionstrength: highscholarly consensus1969–1975recordingradiooral

Mechanism

Metal keeps rock’s long-term working language: the amplified quartet, the album as the unit, backbeat residue, and the FM/festival economy. That is influence, not taxonomy — metal is not a style of rock the way hard rock is. Hard rock is the immediate donor of loudness and riff habit; this edge names the older craft that would still be there if one never used the hard-rock label. Strength high on the target.

Evidence

Metal bands are booked, sold, and taught as rock bands. Grove and textbook histories place the style inside rock’s post-1960s fragmentation, not outside popular music.

Debate

Grove and radio formats still file metal under rock. This corpus does not: the 1970 umbrella is a split, not a child style. Later extreme-metal refusals of the “rock” name fit that encoding; they do not have to wait for a child node.

Mediators

artist: Black Sabbath

Heavy metal → Doom metal

harmonyphrase and lickmeter and groovetimbre and productionstrength: highscholarly consensus1970–1986recordingoral

Mechanism

Doom is the 1970 metal object kept as a tradition: riff-as-form, tritone and modal harmony, down-tuned mass, half-time groove. The 1980s bands do not invent that language; they refuse the speed and gloss forks and teach Sabbath as repertoire. Strength high — the child is hard to explain without the parent records.

Shared material

slow tritone rifflicki–♭ii / tritone ostinato at half-time

Donor Black Sabbath (Black Sabbath, 1970) · opening YouTube · Spotify

Receiver Born Too Late (Saint Vitus, 1986) · opening riff YouTube · Spotify

Same weight and tritone grammar, not a quotation of this Sabbath song. Doom keeps the 1970 object as repertoire

Evidence

Saint Vitus, Pentagram, and Candlemass as Sabbath-school bands; Cope’s analysis of the Sabbath riff as already “doom” before the name. The name crystallizes when the rest of metal has accelerated.

Debate

Whether doom is only a period nickname for early metal. The corpus splits them: 1970 is the genre founding; 1984– is the named style that conserves it. Stoner and drone wait.

Mediators

artist: Black Sabbath; artist: Candlemass

Heavy metal → Glam metal

instrumentationtimbre and productionperformance practicemelodystrength: highwell documented1979–1986recordingradio

Mechanism

Glam metal keeps the parent’s working unit — distorted guitars, high male (and later mixed) vocals, the solo as a display, and the word metal as a scene name — and puts it on a radio-pop chassis. Priest’s range and leather-stage craft are the usual metal hinge; the song form leans on hard rock (separate edge). Strength high on identity and guitar syntax; the pop form is not this transfer.

Evidence

Strip and MTV bands that still market as metal and use power-chord / tapping vocabulary Walser describes for 1980s metal. Weinstein’s lite/underground split treats this as inside the culture.

Debate

Underground scenes deny that glam “is metal.” That is boundary work, useful later for thrash/doom identity, not a reason to unhook the style from the parent. Van Halen stays on Hard rock as mediator, not as this node.

Mediators

artist: Judas Priest; artist: Mötley Crüe

Heavy metal → Grunge

harmonyphrase and licktimbre and productionstrength: mediumwell documented1984–1992recordingoral

Mechanism

Grunge borrows metal’s riff-as-weight: down-tuned or muddy power chords, occasional tritone/Aeolian color, and Sabbath as homework. It does not take thrash chug, glam gloss, or the guitar cadenza as defaults. Strength medium: definitional for Soundgarden and Melvins; weaker on the Nirvana/Mudhoney wing. Punk explains the song and the stance; metal explains the sludge.

Evidence

Scene interviews naming Sabbath (Yarm); Soundgarden riffs that read as metal cells in drop tunings; Melvins as a slow-heavy practice that still comes from the 1970 object (Cope).

Debate

Whether the donor is Doom metal rather than the 1970 umbrella. Doom names the 1980s conservation of that object; Seattle musicians cite Sabbath more often than Candlemass. This edge stays on Heavy metal. Grunge is not a metal style.

Mediators

artist: Black Sabbath; artist: Soundgarden; artist: Melvins

Heavy metal → Industrial metal

instrumentationphrase and licktimbre and productionstrength: highwell documented1988–1992recording

Mechanism

Industrial metal keeps metal’s guitar-riff band and high-gain public and replaces the live-kit default with machine pulse and samples. Strength high. Industrial supplies the factory-timbre parent. Taxonomically a child of Heavy metal.

Evidence

Ministry and Godflesh as metal-chart/metal-press bands using riff units (Weinstein, Grove).

Debate

Whether this leaves metal for industrial. The riff-and-stage job stays metal; the machine mix is industrial’s hop.

Mediators

artist: Ministry; artist: Godflesh

Heavy metal → Neoclassical metal

instrumentationtimbre and productionperformance practicestrength: highwell documented1982–1986recordingoral

Mechanism

Neoclassical metal keeps the umbrella’s working unit — distorted guitars, metal rhythm section, public guitar hero — and spends it on sequence and caprice. Strength high: without metal timbre and stage there is only a violinist. The Bach/Paganini homework is the other incoming pair.

Evidence

Rising Force as a metal instrumental record, not a chamber recital. Walser’s 1980s metal virtuosity describes this wing more tightly than 1970 Sabbath.

Debate

Whether this is “just metal with extra scales.” The corpus names a style once the classical rhetoric is the compositional object, not an occasional solo color.

Mediators

artist: Yngwie Malmsteen

Heavy metal → New Wave of British Heavy Metal

instrumentationphrase and licktimbre and productionperformance practicestrength: highscholarly consensus1977–1982recordingoral

Mechanism

NWOBHM is the parent genre doing a second British job: same riff-and-gain unit, more speed, tighter songs, and a youth press after punk. Priest is the usual hinge from 1970s metal into this wave; Maiden and Diamond Head recode the riff language for a singles circuit. Strength high: without heavy metal there is no style to “new-wave.”

Evidence

Repertory and interviews that name Sabbath and Priest as the school; Sounds packaging of already-metal bands as a wave (1979–80). Twin-lead writing continues a Priest/Wishbone-adjacent metal habit, not a new ensemble.

Debate

How much punk (DIY, tempo, anti-prog) belongs on this transfer. Keep that for a future punk edge. This file is the metal parent only.

Mediators

artist: Judas Priest; artist: Iron Maiden

Heavy metal → Post-metal

instrumentationtimbre and productionperformance practicestrength: mediumscholarly consensus1996–2004recording

Mechanism

Post-metal keeps metal’s guitar-and-kit unit and high-gain public and spends them on long dynamic forms. Strength medium. Sludge and crust are the local donors; this hop is the taxonomic metal child.

Evidence

Neurosis and Isis as metal-press bands writing long-form records (Grove, Weinstein).

Debate

Whether this leaves metal for post-rock. The amp-and-stage job stays metal; the crescendo name leftover is post-rock’s.

Mediators

artist: Neurosis; artist: Isis

Heavy metal → Power metal

melodyperformance practiceform and structurestrength: mediumwell documented1983–1988recordingradio

Mechanism

Power metal keeps the umbrella’s high-vocal, twin-guitar, theatrical craft — Priest more than Sabbath — and writes it as bright speed anthems. The gallop and song school are the NWOBHM edge; this edge is the older metal singer-and-stage language. Strength medium: audible and named, not the riff definition.

Evidence

Halford-range singers as the power-metal default; Walser’s account of 1980s metal virtuosity and fantasy fits this wing better than 1970 Birmingham.

Debate

Whether this is already covered by NWOBHM (Maiden also sings high). Maiden is on the other edge. Priest and the pre-1979 metal stage are the reason this file exists. No Romanticism parent: neoclassical shred is a later optional wing.

Mediators

artist: Judas Priest

Heavy metal → Progressive metal

instrumentationperformance practicemelodystrength: highwell documented1984–1992recordingpedagogy

Mechanism

Prog-metal keeps the umbrella’s working unit and the public guitar/drum virtuoso, then spends that craft on long form and odd meter. Strength high: without metal technique there is no “prog metal,” only prog. Progressive rock as a formal donor waits for a node.

Evidence

Dream Theater and peers trained on metal and on 1970s prog records at once; the stage and the guitar vocabulary remain metal (Walser).

Debate

Whether this is just metal musicians who like Yes. The corpus names a style once the combination is a scene and a market (late 1980s–90s).

Mediators

artist: Judas Priest; artist: Dream Theater

Heavy metal → Speed metal

phrase and lickmelodyinstrumentationstrength: highwell documented1978–1984recording

Mechanism

Speed metal takes the 1970s metal twin-guitar unit, high vocal, and riff song and runs them at gallop and double-kick tempo without hardcore’s bark. Strength high. NWOBHM remains the late-1970s tightening parent. Thrash is a parallel hardcore fork, not this child.

Evidence

Priest Exciter / Freewheel Burning and Accept Fast as a Shark against 1970s metal craft (Weinstein, Grove).

Debate

Whether this is already NWOBHM. The 1979–83 British wave is NWOBHM’s; the named high-speed hinge (Priest/Accept/Helloween) is speed metal’s.

Mediators

artist: Judas Priest