diff --git a/plugins/ladspa_effect/calf/calf/metadata.h b/plugins/ladspa_effect/calf/calf/metadata.h
index a92bb64f1..da99c7407 100644
--- a/plugins/ladspa_effect/calf/calf/metadata.h
+++ b/plugins/ladspa_effect/calf/calf/metadata.h
@@ -253,7 +253,7 @@ struct pulsator_metadata: public plugin_metadata<pulsator_metadata>
     enum { in_count = 2, out_count = 2, ins_optional = 0, outs_optional = 0, support_midi = false, require_midi = false, rt_capable = true };
     enum { param_bypass, param_level_in, param_level_out, param_meter_inL, param_meter_inR,
            param_meter_outL, param_meter_outR, param_clip_inL, param_clip_inR, param_clip_outL, param_clip_outR,
-           param_mode, param_freq, param_amount, param_offset, param_mono, param_count };
+           param_mode, param_freq, param_amount, param_offset, param_mono, param_reset, param_count };
     PLUGIN_NAME_ID_LABEL("pulsator", "pulsator", "Pulsator")
 };
 
diff --git a/plugins/ladspa_effect/calf/calf/modules.h b/plugins/ladspa_effect/calf/calf/modules.h
index d33fe9545..ee8906772 100644
--- a/plugins/ladspa_effect/calf/calf/modules.h
+++ b/plugins/ladspa_effect/calf/calf/modules.h
@@ -1103,6 +1103,7 @@ public:
     void set_params(float f, int m, float o, uint32_t sr, float amount = 1.f);
     float get_value();
     void advance(uint32_t count);
+    void set_phase(float ph);
     void activate();
     void deactivate();
     float get_value_from_phase(float ph, float off);
@@ -1117,6 +1118,7 @@ private:
     float meter_inL, meter_inR, meter_outL, meter_outR;
     float offset_old;
     int mode_old;
+    bool clear_reset;
     lfo_audio_module lfoL, lfoR;
 public:
     float *ins[in_count];
@@ -1129,6 +1131,13 @@ public:
     void deactivate();
     void params_changed();
     void set_sample_rate(uint32_t sr);
+    void params_reset()
+    {
+        if (clear_reset) {
+            *params[param_reset] = 0.f;
+            clear_reset = false;
+        }
+    }
     uint32_t process(uint32_t offset, uint32_t numsamples, uint32_t inputs_mask, uint32_t outputs_mask);
     bool get_graph(int index, int subindex, float *data, int points, cairo_iface *context);
     bool get_dot(int index, int subindex, float &x, float &y, int &size, cairo_iface *context);
diff --git a/plugins/ladspa_effect/calf/src/modules.cpp b/plugins/ladspa_effect/calf/src/modules.cpp
index d03999187..1c6a939ff 100644
--- a/plugins/ladspa_effect/calf/src/modules.cpp
+++ b/plugins/ladspa_effect/calf/src/modules.cpp
@@ -509,6 +509,7 @@ CALF_PORT_PROPS(pulsator) = {
     { 1,           0,           1,     0,  PF_FLOAT | PF_SCALE_PERC, NULL, "amount", "Modulation" },
     { 0.5,         0,           1,     0,  PF_FLOAT | PF_SCALE_PERC, NULL, "offset", "Offset L/R" },
     { 0,           0,           1,     0,  PF_BOOL | PF_CTL_TOGGLE, NULL, "mono", "Mono-in" },
+    { 0,           0,           1,     2,  PF_BOOL | PF_CTL_BUTTON , NULL, "reset", "Reset" },
 };
 
 CALF_PLUGIN_INFO(pulsator) = { 0x8514, "Pulsator", "Calf Pulsator", "Markus Schmidt", calf_plugins::calf_copyright_info, "ModulationPlugin" };
diff --git a/plugins/ladspa_effect/calf/src/modules_dsp.cpp b/plugins/ladspa_effect/calf/src/modules_dsp.cpp
index 3dbb6b0db..d30672ca3 100644
--- a/plugins/ladspa_effect/calf/src/modules_dsp.cpp
+++ b/plugins/ladspa_effect/calf/src/modules_dsp.cpp
@@ -2151,6 +2151,14 @@ void lfo_audio_module::advance(uint32_t count)
         phase = fmod(phase, 1.f);
 }
 
+void lfo_audio_module::set_phase(float ph)
+{
+    //set the phase from outsinde
+    phase = fabs(ph);
+    if (phase >= 1.0)
+        phase = fmod(phase, 1.f);
+}
+
 void lfo_audio_module::set_params(float f, int m, float o, uint32_t sr, float a)
 {
     // freq: a value in Hz
@@ -2225,6 +2233,12 @@ void pulsator_audio_module::params_changed()
 {
     lfoL.set_params(*params[param_freq], *params[param_mode], 0.f, srate, *params[param_amount]);
     lfoR.set_params(*params[param_freq], *params[param_mode], *params[param_offset], srate, *params[param_amount]);
+    clear_reset = false;
+    if (*params[param_reset] >= 0.5) {
+        clear_reset = true;
+        lfoL.set_phase(0.f);
+        lfoR.set_phase(0.f);
+    }
 }
 
 void pulsator_audio_module::set_sample_rate(uint32_t sr)