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Constant Q Profiles for Tracking Modulations in Audio Data
Citation key Purwins2001a
Author Purwins, H. and Blankertz, B. and Obermayer, K.
Title of Book Proceedings of the International Computer Music Conference
Pages 274 – 276
Year 2001
ISBN 0-7695-0619-4
ISSN 1098-7576
DOI 10.1109/IJCNN.2000.859408
Publisher IEEE
Abstract Cq-profiles are 12-dimensional vectors, each component referring to a pitch class. They can be employed to represent keys. Cq-profiles are calculated with the constant Q filter bank (Brown and Puckette 92). They have the following advantages: (i) They correspond to probe tone ratings. (ii) Calculation is possible in real-time. (iii) Stability is obtained with respect to sound quality. (iv) They are transposable. Cq-profiles are reliably applied to modulation tracking by introducing a special distance measure.
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