diff --git a/TTS/utils/audio.py b/TTS/utils/audio.py
index 1d7b7034..154f1c53 100644
--- a/TTS/utils/audio.py
+++ b/TTS/utils/audio.py
@@ -51,7 +51,7 @@ class AudioProcessor(object):
         sample_rate=None,
         resample=False,
         num_mels=None,
-        log_func="np.log",
+        log_func="np.log10",
         min_level_db=None,
         frame_shift_ms=None,
         frame_length_ms=None,