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Playing techniques are important expressive elements in music signals. In this paper, we propose a recognition system based on the joint time-frequency scattering transform (jTFST) for pitch evolution-based playing techniques (PETs), a group of playing techniques with monotonic pitch changes over time. The jTFST represents spectro-temporal patterns in the time-frequency domain, capturing discriminative information of PETs. As a case study, we analyse three commonly used PETs of the Chinesedoi:10.1109/icassp40776.2020.9053474 dblp:conf/icassp/WangLBC20 fatcat:6uz6goh465eazpje4ihdrby2jq