「小號志願軍曲」名中雖有小號，卻是以管風琴演奏。其實這是一種管風琴樂曲的曲種，曲名中的小號，指的是用管風琴裡的小號音栓來演奏這種樂曲，以模仿小號的音色。小號志願軍這種曲子只有英國作曲家寫作，為英國巴洛克時代特有的曲種。樂曲有其固定的型式，通常是一開始以慢速度演奏的序奏，之後則是快速度演奏，右手彈奏出類似小號信號曲一樣的旋律。
專輯中第一首克拉克的「小號志願軍曲」正式曲名是「丹麥王子進行曲」，大約完成於一七零零年左右。克拉克是當時倫敦聖保羅教堂的管風琴師，曲子就是為教堂的管風琴演奏而寫。此曲原本就很有名，但並不稱為「小號志願軍曲」，事實上它是一首輪旋曲式的進行曲。一九八一年在已故英國王妃黛安娜與查爾斯王子婚禮上演奏後，讓此曲更加有名，也經常被人用在婚禮上。查爾斯王子在婚禮上用這首曲子別有緣故，因為他也具有丹麥血統，所以選用這首「丹麥王子進行曲」，是非常名符其實的。
本片中不只有這類以管風琴演奏的軍樂風格信號曲，也有一些非常激勵人心，並改編以小號演奏的樂曲：如古諾改編自巴哈的「聖母頌」、阿爾比諾尼的管風琴「慢板」、孟德爾頌的「無言歌」，乃至原本用小提琴演奏就非常艱難，改編成小號後更是超高難度的「霍拉斷奏曲」。這些改編曲均由超技小號家哈登柏格所演奏。
Jeremiah Clarke
[1] Trumpet Voluntary (arr. Peter Hurford) 2.54
Marc-Antoine Charpentier
[2] Te Deum — Prelude (arr. Chris Hazell) 2.14
Henry Purcell
[3] Trumpet Tune (arr. Peter Hurford) 2.34
The Michael Laird Brass Ensemble / Peter Hurford
George Frideric Handel
[4] Messiah — The Trumpet Shall Sound 4.01
Gwynne Howell bass / John Wilbraham / Academy of St Martin in the Fields / Sir Neville Marriner
John Stanley
[5] Suite in D major, Voluntary — Trumpet Tune (arr. Leslie Pearson) 2.11
John Wilbraham / The London Festival Orchestra / Tutti Camarata
Charles Gounod
[6] Ave Maria (arr. from Bach’s Prelude No.1, BWV 846) 2.56
Giovanni Battista Martini
[7] Toccata (transc. Marie-Claire Alain) 2.15
Georg Philipp Telemann
[8] 12 Heroic Marches — No.1, La majeste (transc. Marie-Claire Alain)1.46
Hakan Hardenberger / Simon Preston organ
Alessandro Marcello
[9] Oboe Concerto in D minor (arr. Trumpet) – II. Adagio 3.34
Hakan Hardenberger / I Musici
Franz Joseph Haydn
[10] Trumpet Concerto in E flat major, Hob.VIIe No.1 — III. Allegro 4.25
Hakan Hardenberger / Academy of St. Martin in the Fields / Sir Neville Marriner Georg Philipp Telemann
[11] 12 Heroic Marches — No.6, L’amour (transc. Marie-Claire Alain) 2.14
Hakan Hardenberger / Simon Preston organ
Antonio Vivaldi
Concerto for Two Trumpets, Strings and Continuo in C major, RV 537
[12] I. Allegro 2.43
[13] II. Largo 1.03
[14] III. (Allegro) 3.04
Hakan Hardenberger, Reinhold Friedrich / I Musici
Tomaso Albinoni
[15] Adagio for Strings and Organ in G minor
(arr. Remo Giazotto, transc. Giovanni Orsomando) 8.27
Hakan Hardenberger / Simon Preston organ
Johann Nepomuk Hummel 1778–1837
[16] Trumpet Concerto in E flat major –— III. Rondo 3.39
Hakan Hardenberger / Academy of St. Martin in the Fields / Sir Neville Marriner
Felix Mendelssohn
[17] Lieder ohne Worte, op.67 — No.4, “The Bee’s Wedding” 2.04
(arr. Hakan Hardenberger / Roland Pontinen)
Virgil Thomson
[18] At the Beach 4.41
Grigoras Dinicu
[19] Hora Staccato 2.01
(arr. Jascha Heifetz / Hakan Hardenberger / Roland Pontinen)
Hakan Hardenberger cornet / Roland Pontinen piano
Jean-Baptiste Arban
[20] Theme and Variations on “The Carnival of Venice” (arr. Tutti Camarata) 6.05
John Wilbraham / The London Festival Orchestra / Tutti Camarata