Timbres
Momente seeks to employ the greatest possible number of vocal phenomena—not just conventional singing but also the communication functions of spoken and whispered language, crying, and laughter, producing an "infinitely rich mode of expression … profoundly touches our emotive sensibility" (Bosseur 1967, 124). Isolated syllables and even single phonemes or linguistic segments, including vowels, continuant consonants, and tongue clicks are used "in a scale extending from unvoiced exhaling via aspiration, whispering, giggling, murmuring, speaking, shouting, screaming and laughing, to singing" in order to "permit the composition of timbral transitions and relations between spoken and instrumental sounds" (Stockhausen 1964b, 132).
In addition to singing, the choir members clap their hands, snap their fingers, stamp and shuffle their feet, and slap their thighs. They also play small "auxiliary" instruments: choir I has cardboard tubes of various lengths with glued-on covers, played like drums using light mallets; choir II uses twelve pairs of claves—all with different pitches; choir III shakes plastic soap boxes and refrigerator drink canisters filled with buckshot, which sound like maracas with different pitches, according to the number of pellets and the size of the plastic canisters or boxes; choir IV uses twelve pairs of Volkswagen lug-nut spanners (which kept disappearing during rehearsals, because most of the choristers drove Volkswagens). The purpose of these instruments was to create mediating links between the percussion and vocal timbres. Having the choristers play simultaneously with each syllable they sing or speak automatically and easily solves the problem of rhythmic coordination (Stockhausen 2009, 129). However, Stockhausen reported that the WDR choir, which sang for the première, initially objected to these practices (Stockhausen 1964a) and, "because such means of sound and noise production can have a comic effect, . . . one newspaper report talked about a 'cabaret performance' and ridiculed the whole thing" (Stockhausen 1964b, 132).
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