diff --git a/coreapi/ec-calibrator.c b/coreapi/ec-calibrator.c
index 5fbf7a1fb..ab3bc80ac 100644
--- a/coreapi/ec-calibrator.c
+++ b/coreapi/ec-calibrator.c
@@ -36,41 +36,50 @@ static void ecc_init_filters(EcCalibrator *ecc){
 
 	ecc->sndread=ms_snd_card_create_reader(ecc->play_card);
 	ms_filter_call_method(ecc->sndread,MS_FILTER_SET_SAMPLE_RATE,&ecc->rate);
+	ms_filter_call_method(ecc->sndread,MS_FILTER_GET_SAMPLE_RATE,&rate);
+	ecc->read_resampler=ms_filter_new(MS_RESAMPLE_ID);
+	ms_filter_call_method(ecc->read_resampler,MS_FILTER_SET_SAMPLE_RATE,&rate);
+	ms_filter_call_method(ecc->read_resampler,MS_FILTER_SET_OUTPUT_SAMPLE_RATE,&ecc->rate);
+	
+	
 	ecc->det=ms_filter_new(MS_TONE_DETECTOR_ID);
 	ms_filter_call_method(ecc->det,MS_FILTER_SET_SAMPLE_RATE,&ecc->rate);
 	ecc->rec=ms_filter_new(MS_FILE_REC_ID);
 
-	ms_filter_link(ecc->sndread,0,ecc->det,0);
+	ms_filter_link(ecc->sndread,0,ecc->read_resampler,0);
+	ms_filter_link(ecc->read_resampler,0,ecc->det,0);
 	ms_filter_link(ecc->det,0,ecc->rec,0);
 
 	ecc->play=ms_filter_new(MS_FILE_PLAYER_ID);
 	ecc->gen=ms_filter_new(MS_DTMF_GEN_ID);
 	ms_filter_call_method(ecc->gen,MS_FILTER_SET_SAMPLE_RATE,&ecc->rate);
-	ecc->resampler=ms_filter_new(MS_RESAMPLE_ID);
+	ecc->write_resampler=ms_filter_new(MS_RESAMPLE_ID);
 	ecc->sndwrite=ms_snd_card_create_writer(ecc->capt_card);
-
-	ms_filter_link(ecc->play,0,ecc->gen,0);
-	ms_filter_link(ecc->gen,0,ecc->resampler,0);
-	ms_filter_link(ecc->resampler,0,ecc->sndwrite,0);
-
+	
 	ms_filter_call_method(ecc->sndwrite,MS_FILTER_SET_SAMPLE_RATE,&ecc->rate);
 	ms_filter_call_method(ecc->sndwrite,MS_FILTER_GET_SAMPLE_RATE,&rate);
-	ms_filter_call_method(ecc->resampler,MS_FILTER_SET_SAMPLE_RATE,&ecc->rate);
-	ms_filter_call_method(ecc->resampler,MS_FILTER_SET_OUTPUT_SAMPLE_RATE,&rate);
+	ms_filter_call_method(ecc->write_resampler,MS_FILTER_SET_SAMPLE_RATE,&ecc->rate);
+	ms_filter_call_method(ecc->write_resampler,MS_FILTER_SET_OUTPUT_SAMPLE_RATE,&rate);
+
+	ms_filter_link(ecc->play,0,ecc->gen,0);
+	ms_filter_link(ecc->gen,0,ecc->write_resampler,0);
+	ms_filter_link(ecc->write_resampler,0,ecc->sndwrite,0);
 
-	ms_ticker_attach(ecc->ticker,ecc->play);
 	ms_ticker_attach(ecc->ticker,ecc->sndread);
+	ms_ticker_attach(ecc->ticker,ecc->play);
+	
 }
 
 static void ecc_deinit_filters(EcCalibrator *ecc){
-	ms_ticker_detach(ecc->ticker,ecc->play);
 	ms_ticker_detach(ecc->ticker,ecc->sndread);
+	ms_ticker_detach(ecc->ticker,ecc->play);
 
 	ms_filter_unlink(ecc->play,0,ecc->gen,0);
-	ms_filter_unlink(ecc->gen,0,ecc->resampler,0);
-	ms_filter_unlink(ecc->resampler,0,ecc->sndwrite,0);
+	ms_filter_unlink(ecc->gen,0,ecc->write_resampler,0);
+	ms_filter_unlink(ecc->write_resampler,0,ecc->sndwrite,0);
 
-	ms_filter_unlink(ecc->sndread,0,ecc->det,0);
+	ms_filter_unlink(ecc->sndread,0,ecc->read_resampler,0);
+	ms_filter_unlink(ecc->read_resampler,0,ecc->det,0);
 	ms_filter_unlink(ecc->det,0,ecc->rec,0);
 
 	ms_filter_destroy(ecc->sndread);
@@ -78,7 +87,8 @@ static void ecc_deinit_filters(EcCalibrator *ecc){
 	ms_filter_destroy(ecc->rec);
 	ms_filter_destroy(ecc->play);
 	ms_filter_destroy(ecc->gen);
-	ms_filter_destroy(ecc->resampler);
+	ms_filter_destroy(ecc->read_resampler);
+	ms_filter_destroy(ecc->write_resampler);
 	ms_filter_destroy(ecc->sndwrite);
 
 	ms_ticker_destroy(ecc->ticker);
@@ -113,7 +123,7 @@ static void ecc_play_tones(EcCalibrator *ecc){
 
 	ms_filter_call_method (ecc->det,MS_TONE_DETECTOR_ADD_SCAN,&expected_tone);
 	
-	tone.frequency=1000;
+	tone.frequency=1300;
 	tone.duration=1000;
 	tone.amplitude=1.0;
 
diff --git a/coreapi/private.h b/coreapi/private.h
index 028b408f8..b44fe4a97 100644
--- a/coreapi/private.h
+++ b/coreapi/private.h
@@ -592,7 +592,8 @@ struct _EcCalibrator{
 	ms_thread_t thread;
 	MSSndCard *play_card,*capt_card;
 	MSFilter *sndread,*det,*rec;
-	MSFilter *play, *gen, *sndwrite,*resampler;
+	MSFilter *play, *gen, *sndwrite;
+	MSFilter *read_resampler,*write_resampler;
 	MSTicker *ticker;
 	LinphoneEcCalibrationCallback cb;
 	void *cb_data;