For solo alto saxophone, subtitled "Etude on trills and tremolos of large intervals." This is the 34th concert étude by Christian Lauba, dedicated to Alex Sebastianutto. 

Score consists of 6 pages, including significant use of multiphonics (fingerings provided). Extended sections of tremolos and virtuosic playing. 

*Also found in Lauba - Volume 9 (Etudes).

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