Bridge Base Songs, 9 of 9

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Description

Heífhen (in English: The Sky River) is a piano duet composed by the Bridge Base Foundation between January and Feburary 2026.

The tempo is given as Andante e agitato, ♩ = 75.

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Primo | Secondo

Structure

Heífhen is in the key of E♭ minor and runs for 54 bars (approx. 3 minutes of playing)

There are four themes in the song, listed in the order in which they appear:

1. The bassline and tremolo "chords". Persists throughout the piece, although the tremolos are replaced with three-note arpeggios in the final sections.
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   music:1000 X:1\nM:4/4\nK:Ebm bass\nL:1/32\n B,EB,EB,EB,E B,EB,EB,EB,E CECECECE CECECECE | F,EF,EF,EF,E F,EF,EF,EF,E G,EG,EG,EG,E G,EG,EG,EG,"> etc."E
2. Short sets of four notes, with a pedal note on E♭ for the first six bars.
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   Initially music:1000 X:1\nM:4/4\nK:Ebm treble+8\nL:1/16\n z7((3 e/f/g/ g8)|z7((3 f/g/a/ a8)|z7((3 g/a/b/ b8)|z7((3 e'/d'/c'/ b8)|z7((3 e/f/g/ g8)|z7((3 f/g/a/ =a8)|z7((3 _a/g/f/ e8)|z7((3 g/f/e/ =d8)| Development (B′) music:1000 X:1\nM:4/4\nK:Ebm treble+8\nL:1/16\n z6((3 efg g8)|z6((3 fga a8)|z6((3 gab b8)|z6((3 e'd'c' b8)|z6((3 efg g8)|z6((3 fga =a8)|z6((3 _agf e8)|z6((3 gfe =d8)|
3. A more tuneful, cantabile line, which has a chromatic descending bassline and builds up tension before the climax (a perfect cadence). The theme's second appearance only develops the first four bars, with a chromatic reharmonisation transitioning into the subdominant.
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   Initially music:1000 X:1\nM:4/4\nK:Ebm treble+8\nL:1/8\n z3 (e B2 A2-|A2) z (d B2 A2 | G2) z (G A2 B2 | (G7/2) F//E// =D4) | z3 (B _d2 A2 | G4) z (E/F/ Ge | d2 c2 (B)ABc | !marcato!B2 !marcato!A2 !marcato!G2 !marcato!F2 | !marcato!E4) Development (C′) music:1000 X:1\nM:4/4\nK:Ebm treble+8\nL:1/8\n z3 (e B2 A2-|A2) z (=d B2 A2 | G2) z (G A2 __B2 | (_F7/2) E//D// =C4) | Second development (C″) music:1000 X:1\nM:4/4\nK:Ebm treble+8\nL:1/16\n "<(" ">)" E4 z2 ((3 ed=c B4 =A4- | A6) ((3 d=cB =A4 F4 | G6) ((3 GFG A4 =A2B2 | (G4) (3 FGF (3 EFE =D8) |\nz6 ((3 B=AB _d4 _A2- (3 ABA | G8) ((3 E=DE (3 FEF (3 GFG (3 AGA | B4 e4 _d2c2)(g2a2 !marcato! b4 !marcato! a4 !marcato! g4 !marcato! f4 | "<(" ">)" g2)
4. The tune played in the introduction of the treble left hand, and at the end of the piece. At the end, the bass plays the original tune, whilst the treble plays a third up.
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   Initially music:1000 X:1\nM:4/4\nK:Ebm treble\nL:1/2\n (E G | F D) | (E B | A F) | Development (D′) music:1000 X:1\nM:4/4\nK:Ebm\nV:T clef=treble+8 name="Primo r.h."\nV:B clef=bass name="Secondo r.h."\nL:1/8\n[V:T] (g b a f) (g d' c' a) | (g b a f e4) | \n[V:B] (E, G, F, D,) (E, B, A, F,) | (E, G, F, D, E,4) |
5. The A♭ minor section, alternating between D♭m and E♭ chords.
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   music:1000 X:1\nM:4/4\nK:Ebm treble+8\nL:1/8\n z3 ((3 d/e/_f/ a2 f2 | =g2) z ((3 e/g/a/ b2 g2 | (a7/2) _f/ d2 f2 | (e)d)(_fe) (a=gec |\nA2) z ((3 d/e/_f/ a2 f2 | (=g)=f)(fe) (ed)(B=G) | ((3 e/f/e/d B2) ((3 =d/e/d/ B A2) | (!marcato!G2 !marcato!F2 !marcato!E2 !marcato!=D2 | !marcato!E2)

Using the labels defined above, the overall structure of the piece is A B C D B′ C′ E C″ D′.

Chord progressions