The Acoustics and Performance of DJ Scratching. Analysis and Modelling
The acoustics and performance of DJ scratching Analysis and modeling KJETIL FALKENBERG HANSEN Doctoral Thesis Stockholm, Sweden 2010 TRITA-CSC-A 2010:01 ISSN 1653-5723 KTH School of Computer Science and Communication ISRN KTH/CSC/A–10/01-SE SE-100 44 Stockholm ISBN 978-91-7415-541-9 SWEDEN Akademisk avhandling som med tillst˚andav Kungl Tekniska h¨ogskolan framl¨agges till offentlig granskning f¨or avl¨aggande av teknologie doktorsexamen i datalogi Fredagen den 12 februari 2010 klockan 10:00 i F2, Kungl Tekniska H¨ogskolan, Lindstedtsv¨agen 26, Stockholm. © Kjetil Falkenberg Hansen, February 2010 Tryck: Universitetsservice US AB iii Abstract This thesis focuses on the analysis and modeling of scratching, in other words, the DJ (disk jockey) practice of using the turntable as a musical instru- ment. There has been experimental use of turntables as musical instruments since their invention, but the use is now mainly ascribed to the musical genre hip-hop and the playing style known as scratching. Scratching has developed to become a skillful instrument-playing practice with complex musical output performed by DJs. The impact on popular music culture has been significant, and for many, the DJ set-up of turntables and a mixer is now a natural instru- ment choice for undertaking a creative music activity. Six papers are included in this thesis, where the first three approach the acoustics and performance of scratching, and the second three approach scratch modeling and the DJ interface. Additional studies included here expand on the scope of the papers. For the acoustics and performance studies, DJs were recorded playing both demonstrations of standard performance techniques, and expressive perfor- mances on sensor-equipped instruments.
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