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Diffstat (limited to 'fx.py')
| -rw-r--r-- | fx.py | 36 |
1 files changed, 0 insertions, 36 deletions
@@ -1,36 +0,0 @@ -# Copyright (c) 2009 John Glover, National University of Ireland, Maynooth -# -# This program is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 2 of the License, or -# (at your option) any later version. -# -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with this program; if not, write to the Free Software -# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - -from simpl import Partial -import numpy as np - -def time_stretch(partials, factor): - """Time stretch partials by factor.""" - stretched_partials = [] - step_size = 1.0 / factor - - for partial in partials: - stretched_partial = Partial() - stretched_partial.starting_frame = partial.starting_frame * factor - stretched_partial.partial_id = partial.partial_id - num_steps = int((partial.get_length() - 1) / step_size) - current_step = 0 - for step in range(num_steps): - current_peak = partial.peaks[int(np.floor(current_step))] - stretched_partial.add_peak(current_peak) - current_step += step_size - stretched_partials.append(stretched_partial) - return stretched_partials
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