Decrease the default reverberation in AEC3

webrtc/modules/audio_processing/include/audio_processing.h

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 261 matching lines @@
         struct Erle {
           float min = 1.f;
           float max_l = 8.f;
           float max_h = 1.5f;
         } erle;
 
         struct EpStrength {
           float lf = 100.f;
           float mf = 1000.f;
           float hf = 5000.f;
-          float default_len = 0.7f;
+          float default_len = 0.f;
         } ep_strength;
 
         struct Mask {
           float m1 = 0.01f;
           float m2 = 0.001f;
           float m3 = 0.01f;
           float m4 = 0.1f;
         } gain_mask;
 
         struct EchoAudibility {
@@ skipping 833 matching lines @@
   // This does not impact the size of frames passed to |ProcessStream()|.
   virtual int set_frame_size_ms(int size) = 0;
   virtual int frame_size_ms() const = 0;
 
  protected:
   virtual ~VoiceDetection() {}
 };
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_INCLUDE_AUDIO_PROCESSING_H_