Promenade is a stereo acousmatic work, commissioned by CRiSAP (Creative Research into Sound Arts Practice). It is based on a recording made in the promenade of Alghero, in Sardinia and makes use of the déjà vu software program developed by Ollie Bown, Michael Casey and Christophe Rhodes. The program facilitated the organisation of collections of sound fragments into groups; sections were constructed and developed by focusing on these similarity groups.
DejaVu uses Chromogram for melodic analysis and MFCC (Mel-Frequency Cepstral Coefficients) for spectral analysis in order to extract a number of features to create the databases. Analysis based on MFCCs approximates the human auditory system’s response and is used mainly in speech recognition systems.
Some of the databases assembled for developing sections in Promenade can be seen in the left column in the image above. At the top right, audio segments with similar melodic profiles appear, indicated by time tags (in seconds) in brackets that follow the names of sound files.
The piece later became part of the larger composition Paramnesia.
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