The record
At a glance
- Artist
- Popol Vuh
- Released
- 1977
- Film
- Herz aus Glas / Heart of Glass
- Film-used tracks
- Two
- Original tracks
- Seven
- Voices
- None
Why it matters
A soundtrack association opens into an autonomous album
Herz aus Glas is a useful correction to the idea that every Popol Vuh album carrying a Herzog title is a complete soundtrack. Only Engel der Gegenwart and Hüter der Schwelle are documented as used in the film; the seven-track LP is a broader autonomous programme. The record is the first Popol Vuh album after the mid-seventies cycle without Djong Yun's voice. Daniel Fichelscher performs all guitars and percussion, making one musician responsible for both melodic lift and physical momentum.
Florian Fricke's piano provides harmonic direction without dominating every track. Matthias von Tippelskirch's flute and Al Gromer's sitar introduce breath and sustained overtone color inside a fully instrumental ensemble. The sequence ranges from quiet acoustic contemplation to Hüter der Schwelle's hard electric attack without treating those poles as different bands. Its importance lies in an exact seven-piece arc whose titles create a moral-spiritual landscape independent of Herzog's scene order.
Herzog 1976–77
Herzog selects music; Popol Vuh builds a larger record
Werner Herzog's film Herz aus Glas was released before the 1977 album and depicts a glassmaking community destabilized by the loss of a secret formula. Herzog used hypnosis with much of the cast, contributing to the film's suspended performance style. Fricke later explained that his collaboration with Herzog did not always begin with a purpose-written complete score. At times Herzog listened to existing Popol Vuh tapes and selected passages for a film.
That working method helps explain why the same-titled LP contains only two works actually used onscreen. Brain issued the German album as 0060.079 in 1977; French Egg editions used Cœur de verre. Florian Fricke and Renate Knaup produced at Bavaria Studio in Munich. The album followed Letzte Tage – Letzte Nächte and retained Fichelscher's stronger electric presence while removing lead vocals.
Instrumental quartet
Fichelscher carries guitar and percussion around Fricke's piano
Fichelscher's double role lets guitar phrasing and percussion breathe together instead of competing for rhythmic authority. His acoustic guitar can maintain repeating motion, while electric guitar introduces sustained peaks and rougher thresholds. Fricke's piano often defines a harmonic doorway rather than filling all available space. Tippelskirch's flute adds an airborne line that remains distinguishable from guitar sustain.
Gromer's sitar supplies drone and articulated string resonance without appearing as a generic album-wide exotic label. Knaup receives production credit despite not singing, a distinction essential to accurate personnel presentation. Bank, Fiedler and Wedel are collectively documented as engineers; unsupported individual track assignments are avoided. No vocal performance appears, so Instrumental is a correct classification for this album.
Acoustic and electric
Drone, flute, sitar and electric-guitar ascent
The album uses sustained tones as continuity across pieces that vary widely in density. Engel der Gegenwart begins with patience and radiant instrumental space. Blätter aus dem Buch der Kühnheit interweaves acoustic color with firmer electric movement. Das Lied von den hohen Bergen lets flute and guitar suggest height without cinematic scene painting.
Hüter der Schwelle makes the record's strongest transition into heavy electric guitar. Der Ruf converts signal and response into a compact Fichelscher composition. Singet uses an imperative title despite containing no singing, making instrumental melody itself the protective song. Gemeinschaft closes by gathering motion into a communal frame rather than reprising the film-used themes.
Track guide
Seven original pieces, only two heard in the film
Engel der Gegenwart
Angel of the Present is one of the two works documented in Herzog's film. Acoustic strings, piano, flute or sustained color create a spacious opening whose title locates transcendence in the current moment. The arrangement does not depict a literal angel; it establishes watchfulness and presence through long decay and careful entry. As the album opener, the piece also separates LP architecture from film chronology. Its eight-minute span is the record's broadest initial environment, allowing the shorter first-side works to emerge as changes of courage and landscape.
Blätter aus dem Buch der Kühnheit
Leaves from the Book of Boldness gives courage a written, fragmentary form. Guitar and percussion introduce firmer motion after the opener's suspended attention, while acoustic detail keeps the track from becoming a simple rock escalation. The title implies pages rather than one complete doctrine, an apt image for a piece assembled from recurring instrumental gestures. It was not one of the two album works used in the film. Its role is specifically musical: it turns angelic presence into action and prepares the mountain song without inventing a scene that Herzog never paired with it.
Das Lied von den hohen Bergen
The Song of the High Mountains closes side one with elevation in its title and rising melodic space in the arrangement. Flute and guitar can suggest open air, while piano supplies grounded harmonic steps. This is an editorial response to sound, not evidence that the track maps a particular filmed mountain. Its placement completes a progression from present angel through bold pages to expanded landscape. The word song applies to instrumental melody; there is no hidden or omitted vocalist. That distinction supports the album's Instrumental classification while preserving the expressive force of its titles.
Hüter der Schwelle
Guardian of the Threshold opens side two and is the second work documented in Herzog's film. Fichelscher's electric guitar becomes markedly heavier, making the record turn feel like a crossed boundary. Percussion drives rather than merely colors the movement, while sustained layers keep contact with side one's resonance. The title does not identify a specific film character; threshold is the stronger structural fact. This piece guards the entrance to the album's more forceful second half, and its compact intensity proves that Popol Vuh's spiritual vocabulary can include abrasion without abandoning concentration.
Der Ruf
The Call is Fichelscher's composition and follows the threshold with a direct signal. Guitar phrases can sound like summons and answer, while percussion keeps the exchange mobile. The piece does not specify who calls or who receives; that openness lets it function between guardian and protective song. Its four-and-a-half-minute scale gives instrumental dialogue enough room to recur without becoming a jam. Compared with Hüter der Schwelle, the pressure is redistributed rather than simply reduced. The track makes the second side a journey through functions—guarding, calling, singing and gathering—rather than a hidden film cue sheet.
Singet, denn der Gesang vertreibt die Wölfe
Sing, for Song Drives Away the Wolves supplies the album's subtitle and central protective image. No voice is present; guitars, flute, piano, sitar and percussion enact the singing instrumentally. Wolves can represent danger, fear or surrounding darkness, but the album documents no single allegorical key. The imperative is communal, preparing Gemeinschaft, while the melody demonstrates how song can exist without lyrics. Placed late on side two, it answers the threshold's electric threat through sustained collective motion rather than victory fanfare. Later English titles and remix projects should not replace this original recording.
Gemeinschaft
Community closes the seven-track LP. The title brings the album from individual angel, guardian and call toward collective presence. Instrumental lines coexist without one becoming a lead voice that silences the others; guitar, piano, flute, sitar and percussion define community through relation. The piece does not reprise a film theme or resolve Herzog's village story. It completes the autonomous album's symbolic path. Later bonus versions can make this seem like a penultimate track, but the original Brain LP ends here, with shared motion replacing the solitude and watchfulness of the opening.
Thresholds
Angels, courage, mountains and communal protection
The titles create a sequence of spiritual and communal functions rather than a documented retelling of Herzog's film. Presence enters through an angel located in the present. Courage appears as pages that can be read, turned and enacted. Mountains enlarge the landscape without fixing a film location.
A guardian marks the second-side threshold and changes the music's physical force. A call requires response, leading toward the protective act of song. Wolves represent an outside danger whose exact meaning remains open. Gemeinschaft closes with community, making collective relation the album's strongest thematic destination.
Brain / Egg
Heart of Glass becomes Cœur de verre
The German Brain LP uses the film title Herz aus Glas and catalogue number 0060.079. French Egg editions use Cœur de verre, while Spanish editions also translate the title. Those national titles identify the same seven-track album. Film association dominates the package even though only two pieces occur in the movie.
The subtitle Singet, denn der Gesang vertreibt die Wölfe gives the autonomous album a second identity. Three tracks form side one and four form side two. Later compact discs append alternate guitar versions or Earth View. A faithful presentation retains both the film-title context and the original seven-work boundary.
1977
Brain issues an album beside Herzog's film
Brain released Herz aus Glas in Germany in 1977. Egg issued French editions under the translated title Cœur de verre. Fricke and Knaup produced at Bavaria Studio with Bank, Fiedler and Wedel engineering. Only Engel der Gegenwart and Hüter der Schwelle are documented as used in the film.
The LP therefore should be called soundtrack-associated or a partial soundtrack, not a complete original score album. No unsupported chart peak or exact sales figure is attached. The film relationship helped the music reach an audience beyond Popol Vuh's album catalogue. Later editions and soundtrack compilations increased that reach while making title and programme distinctions harder to see.
Film and album
A central instrumental record of the late seventies
Herz aus Glas is often regarded as one of Popol Vuh's most approachable instrumental albums. Its seven concise pieces balance the contemplative and rock-oriented sides of the Fichelscher-era ensemble. Hüter der Schwelle demonstrates how electric heaviness can function as a spiritual threshold rather than genre display. The title track does not exist; listeners must resist collapsing the album into one film theme.
The subtitle track has remained an important statement of music as communal protection. The Fricke-Knaup production credit documents collaboration beyond visible performance. Its legacy in film music depends partly on two tracks, while its legacy as an album depends on all seven. Keeping those histories distinct allows both Herzog's selection and Popol Vuh's independent sequence to remain intelligible.
Original seven
Alternative guitars are not original tracks
The original Brain LP contains seven tracks. Cœur de verre and Corazón de Cristal are translated national titles. Auf dem Weg and Hand in Hand in Hand are alternative versions added later. Earth View is another later supplement.
The complete album is not a seven-cue representation of the film. No original title track named Herz aus Glas appears. There are no vocals, so Instrumental is correct. Retain Gemeinschaft as the canonical ending before any bonus.
A listening path
Move from angelic suspension to community
- Begin with the full eight-minute space of Engel der Gegenwart.
- Hear how Blätter introduces firmer motion without breaking the drone.
- Let the mountain song finish side one.
- Use the record turn as the threshold named by Hüter der Schwelle.
- Follow call into protective instrumental song.
- End with Gemeinschaft before exploring alternate guitar versions.
- Watch the film afterward and identify the two used pieces without forcing the other five into unseen scenes.
Research trail
Sources and further reading
- Original Brain programme, credits, editions and Fricke interview — Popol Vuh archival discography
- Herz aus Glas partial-soundtrack and critical context — Popol Vuh archive
- Popol Vuh album chronology — MusicBrainz
- Herz aus Glas film-music research — Popol Vuh archive
- Herz aus Glas album and film title record — AllMusic