diff --git a/app/settings.py b/app/settings.py
index 9289b007..60e1e31a 100644
--- a/app/settings.py
+++ b/app/settings.py
@@ -270,3 +270,4 @@
 EMAIL_HOST = '134.158.33.163'
 EMAIL_SUBJECT_PREFIX = '[TimeSide]'
 
+TIMESIDE_DEFAULT_DECODER = 'aubio_decoder'
\ No newline at end of file
diff --git a/timeside/plugins/analyzer/externals/aubio_pitch.py b/timeside/plugins/analyzer/externals/aubio_pitch.py
index d6de1f15..ffe31410 100644
--- a/timeside/plugins/analyzer/externals/aubio_pitch.py
+++ b/timeside/plugins/analyzer/externals/aubio_pitch.py
@@ -104,7 +104,7 @@ def name():
     @staticmethod
     @interfacedoc
     def version():
-        return "0.4.7"
+        return "0.4.6"
 
     @staticmethod
     @interfacedoc
diff --git a/timeside/plugins/decoder/aubio.py b/timeside/plugins/decoder/aubio.py
index 2e22b9dc..7ac4f2ee 100644
--- a/timeside/plugins/decoder/aubio.py
+++ b/timeside/plugins/decoder/aubio.py
@@ -3,7 +3,7 @@
 """ decoder plugin based on aubio """
 
 from timeside.core.decoder import Decoder, IDecoder, implements, interfacedoc
-from timeside.plugins.decoder.utils import get_sha1
+from timeside.plugins.decoder.utils import get_sha1, get_media_uri_info
 import aubio
 import mimetypes
 
diff --git a/timeside/plugins/decoder/file.py b/timeside/plugins/decoder/file.py
index 80073152..988711d2 100644
--- a/timeside/plugins/decoder/file.py
+++ b/timeside/plugins/decoder/file.py
@@ -107,6 +107,7 @@ def __init__(self, uri, start=0, duration=None, stack=False, sha1=None):
             self._sha1 = sha1.encode('utf8')
 
         self.uri_total_duration = get_media_uri_info(self.uri)['duration']
+        self.uri_duration = self.uri_total_duration
 
         self.mimetype = None
 
diff --git a/timeside/server/models.py b/timeside/server/models.py
index ca8a14de..8678b447 100644
--- a/timeside/server/models.py
+++ b/timeside/server/models.py
@@ -118,6 +118,9 @@ def get_processor_pids():
     os.makedirs(RESULTS_ROOT)
 
 
+DEFAULT_DECODER = getattr(settings, 'TIMESIDE_DEFAULT_DECODER', 'file_decoder')
+
+
 class UUIDEncoder(json.JSONEncoder):
     def default(self, obj):
         if isinstance(obj, UUID):
@@ -408,9 +411,9 @@ def get_audio_duration(self, force=False):
         Return item audio duration
         """
         if (force or not self.audio_duration) and self.source_file:
-            decoder = timeside.core.get_processor('file_decoder')(
+            decoder = timeside.core.get_processor(DEFAULT_DECODER)(
                 uri=self.get_uri())
-            self.audio_duration = decoder.uri_total_duration
+            self.audio_duration = decoder.uri_duration
             super(Item, self).save()
 
     def get_hash(self, force=False):
@@ -455,8 +458,14 @@ def run(self, experience):
         uri = self.get_uri()
 
         # decode audio source
-        decoder = timeside.plugins.decoder.file.FileDecoder(uri=uri,
+        # TODO: use get_processor
+        if DEFAULT_DECODER == 'aubio_decoder':
+            decoder = timeside.plugins.decoder.aubio.AubioDecoder(uri=uri,
                                                             sha1=self.sha1)
+        else:
+            decoder = timeside.plugins.decoder.file.FileDecoder(uri=uri,
+                                                            sha1=self.sha1)
+
         presets = {}
         pipe = decoder
         parent_analyzers = []