diff --git a/coreapi/linphonecore.c b/coreapi/linphonecore.c
index 76bde15aa..7d85d2717 100644
--- a/coreapi/linphonecore.c
+++ b/coreapi/linphonecore.c
@@ -1186,6 +1186,7 @@ static void sound_config_read(LinphoneCore *lc)
 #endif
 	tmp=lp_config_get_int(lc->config,"sound","echocancellation",tmp);
 	linphone_core_enable_echo_cancellation(lc,tmp);
+	linphone_core_set_echo_canceller_filter_name(lc, linphone_core_get_echo_canceller_filter_name(lc));
 	linphone_core_enable_echo_limiter(lc,
 		lp_config_get_int(lc->config,"sound","echolimiter",0));
 	linphone_core_enable_agc(lc,
diff --git a/coreapi/lpconfig.c b/coreapi/lpconfig.c
index c16b827ac..296b0fb73 100644
--- a/coreapi/lpconfig.c
+++ b/coreapi/lpconfig.c
@@ -481,9 +481,11 @@ int linphone_config_read_file(LpConfig *lpconfig, const char *filename){
 }
 
 void lp_item_set_value(LpItem *item, const char *value){
-	char *prev_value=item->value;
-	item->value=ortp_strdup(value);
-	ortp_free(prev_value);
+	if (item->value != value) {
+		char *prev_value=item->value;
+		item->value=ortp_strdup(value);
+		ortp_free(prev_value);
+	}
 }
 
 
diff --git a/coreapi/misc.c b/coreapi/misc.c
index 3d58237c9..c57dfe764 100644
--- a/coreapi/misc.c
+++ b/coreapi/misc.c
@@ -1270,6 +1270,17 @@ const char *linphone_core_get_video_display_filter(LinphoneCore *lc){
 	return lp_config_get_string(lc->config,"video","displaytype",NULL);
 }
 
+void linphone_core_set_echo_canceller_filter_name(LinphoneCore *lc, const char *filtername) {
+	lp_config_set_string(lc->config, "sound", "ec_filter", filtername);
+	if (filtername != NULL) {
+		ms_factory_set_echo_canceller_filter_name(lc->factory, filtername);
+	}
+}
+
+const char * linphone_core_get_echo_canceller_filter_name(const LinphoneCore *lc) {
+	return lp_config_get_string(lc->config, "sound", "ec_filter", NULL);
+}
+
 /**
  * Queue a task into the main loop. The data pointer must remain valid until the task is completed.
  * task_fun must return BELLE_SIP_STOP when job is finished.
diff --git a/include/linphone/core.h b/include/linphone/core.h
index 568a17672..c27a6ce2b 100644
--- a/include/linphone/core.h
+++ b/include/linphone/core.h
@@ -4145,6 +4145,23 @@ LINPHONE_PUBLIC const char *linphone_core_get_video_display_filter(LinphoneCore
 **/
 LINPHONE_PUBLIC void linphone_core_set_video_display_filter(LinphoneCore *lc, const char *filtername);
 
+/**
+ * Get the name of the mediastreamer2 filter used for echo cancelling.
+ * @param[in] lc LinphoneCore object
+ * @return The name of the mediastreamer2 filter used for echo cancelling
+ * @ingroup media_parameters
+ */
+LINPHONE_PUBLIC const char * linphone_core_get_echo_canceller_filter_name(const LinphoneCore *lc);
+
+/**
+ * Set the name of the mediastreamer2 filter to be used for echo cancelling.
+ * This is for advanced users of the library.
+ * @param[in] lc LinphoneCore object
+ * @param[in] filtername The name of the mediastreamer2 filter to be used for echo cancelling
+ * @ingroup media_parameters
+ */
+LINPHONE_PUBLIC void linphone_core_set_echo_canceller_filter_name(LinphoneCore *lc, const char *filtername);
+
 /** Contact Providers
   */