diff --git a/fluidsynth/src/rvoice/fluid_rvoice_mixer.c b/fluidsynth/src/rvoice/fluid_rvoice_mixer.c
index 0a04f1b9..f09cd27b 100644
--- a/fluidsynth/src/rvoice/fluid_rvoice_mixer.c
+++ b/fluidsynth/src/rvoice/fluid_rvoice_mixer.c
@@ -24,6 +24,7 @@
 #include "fluid_rev.h"
 #include "fluid_chorus.h"
 #include "fluidsynth_priv.h"
+#include "fluid_ladspa.h"
 
 #define SYNTH_REVERB_CHANNEL 0
 #define SYNTH_CHORUS_CHANNEL 1
@@ -76,6 +77,10 @@ struct _fluid_rvoice_mixer_t {
   int active_voices; /**< Read-only: Number of non-null voices */
   int current_blockcount;      /**< Read-only: how many blocks to process this time */
 
+#ifdef LADSPA
+  fluid_LADSPA_FxUnit_t* LADSPA_FxUnit; /**< Used by mixer only: Effects unit for LADSPA support. Never created or freed */
+#endif
+
 #ifdef ENABLE_MIXER_THREADS
 //  int sleeping_threads;        /**< Atomic: number of threads currently asleep */
 //  int active_threads;          /**< Atomic: number of threads in the thread loop */
@@ -131,6 +136,38 @@ fluid_rvoice_mixer_process_fx(fluid_rvoice_mixer_t* mixer)
     }
     fluid_profile(FLUID_PROF_ONE_BLOCK_CHORUS, prof_ref);
   }
+  
+#ifdef LADSPA
+  /* Run the signal through the LADSPA Fx unit */
+  if (mixer->LADSPA_FxUnit) {
+    int j;
+    FLUID_DECLARE_VLA(fluid_real_t*, left_buf, mixer->buffers.buf_count);
+    FLUID_DECLARE_VLA(fluid_real_t*, right_buf, mixer->buffers.buf_count);
+    FLUID_DECLARE_VLA(fluid_real_t*, fx_left_buf, mixer->buffers.fx_buf_count);
+    FLUID_DECLARE_VLA(fluid_real_t*, fx_right_buf, mixer->buffers.fx_buf_count);
+    for (j=0; j < mixer->buffers.buf_count; j++) {
+      left_buf[j] = mixer->buffers.left_buf[j];
+      right_buf[j] = mixer->buffers.right_buf[j];
+    }
+    for (j=0; j < mixer->buffers.fx_buf_count; j++) {
+      fx_left_buf[j] = mixer->buffers.fx_left_buf[j];
+      fx_right_buf[j] = mixer->buffers.fx_right_buf[j];
+    }
+    for (i=0; i < mixer->current_blockcount * FLUID_BUFSIZE; i += FLUID_BUFSIZE) {
+      fluid_LADSPA_run(mixer->LADSPA_FxUnit, left_buf, right_buf, fx_left_buf, 
+		       fx_right_buf);
+      for (j=0; j < mixer->buffers.buf_count; j++) {
+        left_buf[j] += FLUID_BUFSIZE;
+        right_buf[j] += FLUID_BUFSIZE;
+      }
+      for (j=0; j < mixer->buffers.fx_buf_count; j++) {
+        fx_left_buf[j] += FLUID_BUFSIZE;
+        fx_right_buf[j] += FLUID_BUFSIZE;
+      }
+    }
+    fluid_check_fpe("LADSPA");
+  }
+#endif
 }
 
 /**
@@ -598,6 +635,14 @@ void delete_fluid_rvoice_mixer(fluid_rvoice_mixer_t* mixer)
 }
 
 
+#ifdef LADSPA				    
+void fluid_rvoice_mixer_set_ladspa(fluid_rvoice_mixer_t* mixer, 
+				   fluid_LADSPA_FxUnit_t* ladspa)
+{
+  mixer->LADSPA_FxUnit = ladspa;
+}
+#endif
+
 void fluid_rvoice_mixer_set_reverb_enabled(fluid_rvoice_mixer_t* mixer, int on)
 {
   mixer->fx.with_reverb = on;
diff --git a/fluidsynth/src/rvoice/fluid_rvoice_mixer.h b/fluidsynth/src/rvoice/fluid_rvoice_mixer.h
index 94d06360..74befb4f 100644
--- a/fluidsynth/src/rvoice/fluid_rvoice_mixer.h
+++ b/fluidsynth/src/rvoice/fluid_rvoice_mixer.h
@@ -24,6 +24,7 @@
 
 #include "fluidsynth_priv.h"
 #include "fluid_rvoice.h"
+#include "fluid_ladspa.h"
 
 typedef struct _fluid_rvoice_mixer_t fluid_rvoice_mixer_t;
 
@@ -60,6 +61,11 @@ void fluid_rvoice_mixer_reset_fx(fluid_rvoice_mixer_t* mixer);
 
 void fluid_rvoice_mixer_set_threads(fluid_rvoice_mixer_t* mixer, int thread_count, 
 				    int prio_level);
+				    
+#ifdef LADSPA				    
+void fluid_rvoice_mixer_set_ladspa(fluid_rvoice_mixer_t* mixer, 
+				   fluid_LADSPA_FxUnit_t* ladspa);
+#endif
 
 #endif
 
diff --git a/fluidsynth/src/synth/fluid_synth.c b/fluidsynth/src/synth/fluid_synth.c
index 2cb31b35..d4ec55f4 100644
--- a/fluidsynth/src/synth/fluid_synth.c
+++ b/fluidsynth/src/synth/fluid_synth.c
@@ -684,11 +684,6 @@ new_fluid_synth(fluid_settings_t *settings)
     nbuf = synth->audio_groups;
   }
 
-#ifdef LADSPA
-  /* Create and initialize the Fx unit.*/
-  synth->LADSPA_FxUnit = new_fluid_LADSPA_FxUnit(synth);
-#endif
-
   /* as soon as the synth is created it starts playing. */
   synth->state = FLUID_SYNTH_PLAYING;
   synth->sfont_info = NULL;
@@ -706,7 +701,13 @@ new_fluid_synth(fluid_settings_t *settings)
 						      nbuf, synth->effects_channels);
   if (synth->eventhandler == NULL)
     goto error_recovery; 
-    
+
+#ifdef LADSPA
+  /* Create and initialize the Fx unit.*/
+  synth->LADSPA_FxUnit = new_fluid_LADSPA_FxUnit(synth);
+  fluid_rvoice_mixer_set_ladspa(synth->eventhandler->mixer, synth->LADSPA_FxUnit);
+#endif
+  
   /* allocate and add the default sfont loader */
   loader = new_fluid_defsfloader();
 
@@ -3296,13 +3297,6 @@ fluid_synth_render_blocks(fluid_synth_t* synth, int blockcount)
   //				!do_not_mix_fx_to_out);
   blockcount = fluid_rvoice_mixer_render(synth->eventhandler->mixer, blockcount);
 
- 
-#ifdef LADSPA
-  /* Run the signal through the LADSPA Fx unit */
-  fluid_LADSPA_run(synth->LADSPA_FxUnit, synth->left_buf, synth->right_buf, synth->fx_left_buf, synth->fx_right_buf);
-  fluid_check_fpe("LADSPA");
-#endif
-
 #if 0
   /* Signal return queue thread if there are any events pending */
   if (fluid_atomic_int_get (&synth->return_queue->count) > 0)