Added wrapper around reading in wav files, choosing the right floating point type and scaling values to between -1 and 1

2 files changed, 26 insertions, 0 deletions

diff --git a/__init__.py b/__init__.py
index cd46097..182226e 100644
--- a/__init__.py
+++ b/__init__.py
@@ -20,6 +20,7 @@ from sndobj import SndObjPeakDetection, SndObjPartialTracking, SndObjSynthesis
 from sms import SMSPeakDetection, SMSPartialTracking, SMSSynthesis, SMSResidual
 from mq import MQPeakDetection, MQPartialTracking, MQSynthesis
 from plot import plot_peaks, plot_partials
+from audio import read_wav
 
 import numpy
 
diff --git a/audio.py b/audio.py
new file mode 100644
index 0000000..f35210b
--- /dev/null
+++ b/audio.py
@@ -0,0 +1,25 @@
+# Copyright (c) 2010 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
+
+import numpy as np
+from scipy.io.wavfile import read, write
+import simpl
+
+def read_wav(file):
+    audio_data = read(file)
+    # return floating point values between -1 and 1
+    return simpl.asarray(audio_data[1]) / 32768.0, audio_data[0]
+