function visualizeAP(anchorpoints,parameter) %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Name: visualizeAP % Date: 03-2014 % Programmer: Jonathan Driedger % http://www.audiolabs-erlangen.de/resources/MIR/TSMtoolbox/ % % Visualizes a set of anchorpoints. % % Input: anchorpoints an n x 2 matrix specifying a set of % anchorpoints. An anchorpoint is a pair of % sample positions [l k] which says that sample % position l of the input signal should be % (roughly) mapped to sample position k in the % TSM result. % parameter. % fsAudio the sampling rate of the audio signal x. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Reference: % If you use the 'TSM toolbox' please refer to: % [DM14] Jonathan Driedger, Meinard Mueller % TSM Toolbox: MATLAB Implementations of Time-Scale Modification % Algorithms % Proceedings of the 17th International Conference on Digital Audio % Effects, Erlangen, Germany, 2014. % % License: % This file is part of 'TSM toolbox'. % % MIT License % % Copyright (c) 2021 Jonathan Driedger, Meinard Mueller, International Audio % Laboratories Erlangen, Germany. % % We thank the German Research Foundation (DFG) for various research grants % that allow us for conducting fundamental research in music processing. % The International Audio Laboratories Erlangen are a joint institution of % the Friedrich-Alexander-Universitaet Erlangen-Nuernberg (FAU) and % Fraunhofer Institute for Integrated Circuits IIS. % % Permission is hereby granted, free of charge, to any person obtaining a % copy of this software and associated documentation files (the % "Software"), to deal in the Software without restriction, including % without limitation the rights to use, copy, modify, merge, publish, % distribute, sublicense, and/or sell copies of the Software, and to permit % persons to whom the Software is furnished to do so, subject to the % following conditions: % % The above copyright notice and this permission notice shall be included % in all copies or substantial portions of the Software. % % THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS % OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF % MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. % IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY % CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, % TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE % SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % check parameters %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% if nargin<2 parameter=[]; end if nargin<1 error('Please specify the anchorpoints.'); end if ~isfield(parameter,'fsAudio') parameter.fsAudio = 22050; end %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % visualization %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% apIn = anchorpoints(:,1)/parameter.fsAudio; apOut = anchorpoints(:,2)/parameter.fsAudio; figure; plot(apIn,apOut,'+r','MarkerSize',6); hold on; plot(apIn,apOut,'k'); legend('Anchorpoints','Linear interpolation','Location','SouthEast') plot(apIn,apOut,'+r','MarkerSize',6); box on; axis tight; xlabel('Time-axis input [sec]'); ylabel('Time-axis output [sec]') end