diff --git a/owrx/feature.py b/owrx/feature.py
index 457588b..74b5970 100644
--- a/owrx/feature.py
+++ b/owrx/feature.py
@@ -16,7 +16,7 @@ class FeatureDetector(object):
         "rtl_sdr": [ "rtl_sdr" ],
         "sdrplay": [ "rx_tools" ],
         "hackrf": [ "hackrf_transfer" ],
-        "digital_voice": [ "digiham" ]
+        "digital_voice": [ "digiham", "sox" ]
     }
 
     def feature_availability(self):