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Brian Ferneyhough, Carceri
d’Invenzione IIb (m. 29)
Air sounds are produced by aiming a diffuse air stream above the embouchure
hole. Different sounds are possible, from a gentle "whoosh"
to a harsh "hiss." The fingered pitch is discernible in each
case. While second- and third-octave air sounds are possible, the most
effective notes are in the lowest register. Brian Ferneyhough combines
air sounds with regular pitches in Carceri
d'Invenzione IIb. He uses open, diamond-shaped note heads to
indicate their use. This symbol is not necessarily the standard notation
for this technique, however; writing an explanatory note in the score
or in the preface will alleviate any doubt about the composer’s
intention.
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