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A Novel Efficient Algorithm for Music Transposition
Lawlor, Bob; Fagan, A.D.
We present a novel efficient algorithm for scaling the frequency content of an audio signal by any desired factor in the range 0.5 (minus one octave) to 2.0 (plus one octave) enabling a recording to be played in any desired key without affecting the tempo. The algorithm uses an adaptive overlap-add (AOLA) technique to realise the desired frequency scaling without affecting the duration. Informal listening tests show output quality equal to that of a conventional overlap-add algorithm used in many commercially available systems, but offering significant computational saving relative to that algorithm. The algorithm is also used to simultaneously scale both the tempo and key of a recording.
Keyword(s): music; speech-based user interfaces; speech processing
Publication Date:
Type: Book chapter
Peer-Reviewed: Yes
Institution: Maynooth University
Citation(s): Lawlor, Bob and Fagan, A.D. (1999) A Novel Efficient Algorithm for Music Transposition. In: Proceedings 25th EUROMICRO Conference. Informatics: Theory and Practice for the New Millennium. IEEE, pp. 161-167. ISBN 0769503217
Publisher(s): IEEE
File Format(s): other
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First Indexed: 2020-04-02 06:20:31 Last Updated: 2020-04-02 06:20:31