sc/get-spectrum [ Modules ]
NAME
get-spectrum File: get-spectrum.lsp Class Hierarchy: none (no classes defined) Version: 1.0.12 Project: slippery chicken (algorithmic composition) Purpose: Used mainly by spectra.lsp, get-spectrum returns, as a list, the most prominent frequencies in a sound file. The list is ordered from the most prominent to the least prominent frequency (:order-by 'amp) or the highest to lowest frequency (:order-by 'freq) and the number of elements in the list is set by the <num-partials> parameter. The instrument spec-an is called by get-spectrum and is therefore not meant to be used as a public function (it is written as an instrument to take advantage of CLM's run-loop efficiency). The results of analysis are stored in *slippery-chicken-get-spectrum-last-result* so that if you request the same analysis repeatedly, the analysis will not need to be reperformed each time. Be careful though, only the input file, the ordering, the number of partials requested and the analysis start time are used to detect whether analysis has to be reperformed or not. If you want to force reanalysis, do (setf *slippery-chicken-get-spectrum-last-result* nil) before the call to get-spectrum. Creation date: This is very old code but it was added to slippery chicken on August 5th 2015 Author: Michael Edwards: m@michael-edwards.org $$ Last modified: 11:23:34 Tue Jan 16 2024 CET SVN ID: $Id: get-spectrum.lsp 5359 2015-07-24 20:53:22Z medward2 $