diff --git a/plugins/ladspa_effect/calf/calf/metadata.h b/plugins/ladspa_effect/calf/calf/metadata.h
index fd89b6040..87062c5cc 100644
--- a/plugins/ladspa_effect/calf/calf/metadata.h
+++ b/plugins/ladspa_effect/calf/calf/metadata.h
@@ -131,7 +131,7 @@ struct monosynth_metadata: public plugin_metadata<monosynth_metadata>
 struct compressor_metadata: public plugin_metadata<compressor_metadata>
 {
     enum { in_count = 2, out_count = 2, support_midi = false, require_midi = false, rt_capable = true };
-    enum { param_threshold, param_ratio, param_attack, param_release, param_makeup, param_knee, param_detection, param_stereo_link, param_aweighting, param_compression, param_peak, param_clip, param_bypass, // param_freq, param_bw, 
+    enum { param_threshold, param_ratio, param_attack, param_release, param_makeup, param_knee, param_detection, param_stereo_link, param_aweighting, param_compression, param_peak, param_clip, param_bypass, param_input,// param_freq, param_bw, 
         param_count };
     PLUGIN_NAME_ID_LABEL("compressor", "compressor", "Compressor")
 };
diff --git a/plugins/ladspa_effect/calf/src/modules.cpp b/plugins/ladspa_effect/calf/src/modules.cpp
index f9765f160..fec477d6a 100644
--- a/plugins/ladspa_effect/calf/src/modules.cpp
+++ b/plugins/ladspa_effect/calf/src/modules.cpp
@@ -226,6 +226,7 @@ CALF_PORT_PROPS(compressor) = {
     { 0,      0,  1,    0, PF_FLOAT | PF_SCALE_GAIN | PF_CTL_METER | PF_CTLO_LABEL | PF_UNIT_DB | PF_PROP_OUTPUT | PF_PROP_OPTIONAL, NULL, "peak", "Peak Output" },
     { 0,      0,  1,    0, PF_FLOAT | PF_CTL_LED | PF_PROP_OUTPUT | PF_PROP_OPTIONAL, NULL, "clip", "0dB" },
     { 0,      0,  1,    0, PF_BOOL | PF_CTL_TOGGLE, NULL, "bypass", "Bypass" },
+    { 1,           0,           64,    0,  PF_FLOAT | PF_SCALE_GAIN | PF_CTL_KNOB | PF_UNIT_COEF | PF_PROP_NOBOUNDS, NULL, "input", "Input" },
     // { 2000,      10,20000,    0, PF_FLOAT | PF_SCALE_LOG | PF_CTL_KNOB | PF_UNIT_HZ | PF_PROP_GRAPH, NULL, "deess_freq", "Frequency" },
     // { 0.707,  0.707,   32,    0, PF_FLOAT | PF_SCALE_GAIN | PF_CTL_KNOB | PF_UNIT_COEF, NULL, "deess_res", "Q" },
 };
diff --git a/plugins/ladspa_effect/calf/src/modules_dsp.cpp b/plugins/ladspa_effect/calf/src/modules_dsp.cpp
index bb3d9daef..56d93f39b 100644
--- a/plugins/ladspa_effect/calf/src/modules_dsp.cpp
+++ b/plugins/ladspa_effect/calf/src/modules_dsp.cpp
@@ -580,8 +580,8 @@ uint32_t compressor_audio_module::process(uint32_t offset, uint32_t numsamples,
     clip -= std::min(clip, numsamples);
 
     while(offset < numsamples) {
-        float left = ins[0][offset];
-        float right = ins[1][offset];
+        float left = ins[0][offset] * *params[param_input];
+        float right = ins[1][offset] * *params[param_input];
         
         if(aweighting == 1) {
             left = awL.process(left);