diff --git a/audio/dsp_filter.c b/audio/dsp_filter.c
index 8d7b2c5fd6..98fad2b859 100644
--- a/audio/dsp_filter.c
+++ b/audio/dsp_filter.c
@@ -128,6 +128,7 @@ static int get_int(void *userdata, const char *key_str, int *value, int default_
    { \
       *values = (T*)calloc(num_default_values, sizeof(T)); \
       memcpy(*values, default_values, sizeof(T) * num_default_values); \
+      *out_num_values = num_default_values; \
       return false; \
    }
 
@@ -164,7 +165,7 @@ static int get_string(void *userdata, const char *key_str,
    }
 }
 
-static void dspfilter_free(void *userdata, void *ptr)
+static void dspfilter_free(void *ptr)
 {
    free(ptr);
 }
@@ -225,7 +226,7 @@ static bool append_plugs(rarch_dsp_filter_t *dsp, struct string_list *list)
    unsigned i;
    dspfilter_simd_mask_t mask = rarch_get_cpu_features();
 
-   for (i = 0; i < dsp->num_plugs; i++)
+   for (i = 0; i < list->size; i++)
    {
       dylib_t lib = dylib_load(list->elems[i].data);
       if (!lib)
diff --git a/audio/dsp_filter.h b/audio/dsp_filter.h
index 7ae95a5367..49cb21bca2 100644
--- a/audio/dsp_filter.h
+++ b/audio/dsp_filter.h
@@ -24,11 +24,11 @@ void rarch_dsp_filter_free(rarch_dsp_filter_t *dsp);
 
 struct rarch_dsp_data
 {
-   const float *input;
+   float *input;
    unsigned input_frames;
 
    // Set by rarch_dsp_filter_process().
-   const float *output;
+   float *output;
    unsigned output_frames;
 };
 
diff --git a/audio/filters/Panning.dsp b/audio/filters/Panning.dsp
index f8d6afd62e..411345fca9 100644
--- a/audio/filters/Panning.dsp
+++ b/audio/filters/Panning.dsp
@@ -7,7 +7,6 @@ filter0 = panning
 panning_left_mix = "1.0 0.0"
 panning_right_mix = "0.0 1.0"
 
-
 # Some examples:
 #
 # Mono:
@@ -17,4 +16,8 @@ panning_right_mix = "0.0 1.0"
 # Swap left and right channels:
 # panning_left_mix = "0.0 1.0"
 # panning_right_mix = "1.0 0.0"
+#
+# Mono on one speaker:
+# panning_left_mix = "0.5 0.5"
+# panning_right_mix = "0.0 0.0"
 
diff --git a/audio/filters/panning.c b/audio/filters/panning.c
index 259930abfa..6085b60d77 100644
--- a/audio/filters/panning.c
+++ b/audio/filters/panning.c
@@ -1,3 +1,18 @@
+/*  RetroArch - A frontend for libretro.
+ *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
+ *
+ *  RetroArch is free software: you can redistribute it and/or modify it under the terms
+ *  of the GNU General Public License as published by the Free Software Found-
+ *  ation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ *  PURPOSE.  See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with RetroArch.
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #include "dspfilter.h"
 #include <math.h>
 #include <stdlib.h>
@@ -52,8 +67,13 @@ static void *panning_init(const struct dspfilter_info *info,
 
    if (num_left == 2)
       memcpy(pan->left, left, sizeof(pan->left));
+   else
+      memcpy(pan->left, default_left, sizeof(pan->left));
+
    if (num_right == 2)
       memcpy(pan->right, right, sizeof(pan->right));
+   else
+      memcpy(pan->right, default_right, sizeof(pan->right));
 
    config->free(left);
    config->free(right);
diff --git a/frontend/menu/backend/menu_common_backend.c b/frontend/menu/backend/menu_common_backend.c
index d8933e0136..bb58226e7b 100644
--- a/frontend/menu/backend/menu_common_backend.c
+++ b/frontend/menu/backend/menu_common_backend.c
@@ -4061,7 +4061,7 @@ static void menu_common_setting_set_label(char *type_str, size_t type_str_size,
          }
          break;
       case RGUI_SETTINGS_AUDIO_DSP_FILTER:
-         strlcpy(type_str, g_settings.audio.dsp_plugin, type_str_size);
+         strlcpy(type_str, path_basename(g_settings.audio.dsp_plugin), type_str_size);
          break;
 #ifdef HAVE_OVERLAY
       case RGUI_SETTINGS_OVERLAY_PRESET: