diff options
Diffstat (limited to 'power_sequencer/operators/audiosync/ensure_non_zero.py')
| -rw-r--r-- | power_sequencer/operators/audiosync/ensure_non_zero.py | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/power_sequencer/operators/audiosync/ensure_non_zero.py b/power_sequencer/operators/audiosync/ensure_non_zero.py new file mode 100644 index 00000000..911ab91b --- /dev/null +++ b/power_sequencer/operators/audiosync/ensure_non_zero.py @@ -0,0 +1,28 @@ +# +# Copyright (C) 2016-2019 by Nathan Lovato, Daniel Oakey, Razvan Radulescu, and contributors +# +# This file is part of Power Sequencer. +# +# Power Sequencer 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 3 of the +# License, or (at your option) any later version. +# +# Power Sequencer 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 Power Sequencer. If +# not, see <https://www.gnu.org/licenses/>. +# +import numpy as np + + +def ensure_non_zero(signal): + """ + Adds a little bit of static to avoid + 'divide by zero encountered in log' during MFCC computation. + """ + + signal += np.random.random(len(signal)) * 10 ** -10 + + return signal |