diff --git a/drmr.c b/drmr.c
index 6194ee9..d68361b 100644
--- a/drmr.c
+++ b/drmr.c
@@ -126,6 +126,8 @@ connect_port(LV2_Handle instance,
   case DRMR_KITNUM:
     if(data) drmr->kitReq = (float*)data;
     break;
+  case DRMR_BASENOTE:
+    if (data) drmr->baseNote = (float*)data;
   default:
     break;
   }
@@ -169,10 +171,11 @@ static inline void layer_to_sample(drmr_sample *sample, float gain) {
 #define DB_CO(g) ((g) > GAIN_MIN ? powf(10.0f, (g) * 0.05f) : 0.0f)
 
 static void run(LV2_Handle instance, uint32_t n_samples) {
-  int i,kitInt;
+  int i,kitInt,baseNote;
   DrMr* drmr = (DrMr*)instance;
 
   kitInt = (int)floorf(*(drmr->kitReq));
+  baseNote = (int)floorf(*(drmr->baseNote));
   if (kitInt != drmr->curKit) // requested a new kit
     pthread_cond_signal(&drmr->load_cond);
 
@@ -190,7 +193,7 @@ static void run(LV2_Handle instance, uint32_t n_samples) {
 	  break;
 	case 9: {
 	  uint8_t nn = data[1];
-	  nn-=60; // middle c is our root note (setting?)
+	  nn-=baseNote;
 	  // need to mutex this to avoid getting the samples array
 	  // changed after the check that the midi-note is valid
 	  pthread_mutex_lock(&drmr->load_mutex); 
diff --git a/drmr.h b/drmr.h
index b5714eb..3ac7a21 100644
--- a/drmr.h
+++ b/drmr.h
@@ -70,6 +70,7 @@ typedef enum {
   DRMR_LEFT,
   DRMR_RIGHT,
   DRMR_KITNUM,
+  DRMR_BASENOTE,
   DRMR_GAIN_ONE,
   DRMR_GAIN_TWO,
   DRMR_GAIN_THREE,
@@ -147,6 +148,7 @@ typedef struct {
   float** gains;
   float** pans;
   float* kitReq;
+  float* baseNote;
   double rate;
 
   // URIs
diff --git a/drmr.ttl b/drmr.ttl
index 8c76c21..bbe4100 100644
--- a/drmr.ttl
+++ b/drmr.ttl
@@ -44,14 +44,26 @@
     lv2:symbol "kit_num";
     lv2:name "Kit Index";
     lv2:minimum 0;
-    lv2:maximum 50;
+    lv2:maximum 200;
     lv2:default 0;
     lv2:portProperty lv2:integer;
   ],
 
+
+  [
+    a lv2:ControlPort, lv2:InputPort;
+    lv2:index 4;
+    lv2:symbol "base_note";
+    lv2:name "Midi Base Note";
+    lv2:minimum 21;
+    lv2:maximum 107;
+    lv2:default 36;
+    lv2:portProperty lv2:integer;
+  ],
+
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 4;
+    lv2:index 5;
     lv2:symbol "gain_one";
     lv2:name "Sample One Gain";
     lv2:minimum -60.0;
@@ -65,7 +77,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 5;
+    lv2:index 6;
     lv2:symbol "gain_two";
     lv2:name "Sample Two Gain";
     lv2:minimum -60.0;
@@ -79,7 +91,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 6;
+    lv2:index 7;
     lv2:symbol "gain_three";
     lv2:name "Sample Three Gain";
     lv2:minimum -60.0;
@@ -93,7 +105,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 7;
+    lv2:index 8;
     lv2:symbol "gain_four";
     lv2:name "Sample Four Gain";
     lv2:minimum -60.0;
@@ -107,7 +119,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 8;
+    lv2:index 9;
     lv2:symbol "gain_five";
     lv2:name "Sample Five Gain";
     lv2:minimum -60.0;
@@ -121,7 +133,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 9;
+    lv2:index 10;
     lv2:symbol "gain_six";
     lv2:name "Sample Six Gain";
     lv2:minimum -60.0;
@@ -135,7 +147,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 10;
+    lv2:index 11;
     lv2:symbol "gain_seven";
     lv2:name "Sample Seven Gain";
     lv2:minimum -60.0;
@@ -149,7 +161,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 11;
+    lv2:index 12;
     lv2:symbol "gain_eight";
     lv2:name "Sample Eight Gain";
     lv2:minimum -60.0;
@@ -163,7 +175,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 12;
+    lv2:index 13;
     lv2:symbol "gain_nine";
     lv2:name "Sample Nine Gain";
     lv2:minimum -60.0;
@@ -177,7 +189,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 13;
+    lv2:index 14;
     lv2:symbol "gain_ten";
     lv2:name "Sample Ten Gain";
     lv2:minimum -60.0;
@@ -191,7 +203,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 14;
+    lv2:index 15;
     lv2:symbol "gain_eleven";
     lv2:name "Sample Eleven Gain";
     lv2:minimum -60.0;
@@ -205,7 +217,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 15;
+    lv2:index 16;
     lv2:symbol "gain_twelve";
     lv2:name "Sample Twelve Gain";
     lv2:minimum -60.0;
@@ -219,7 +231,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 16;
+    lv2:index 17;
     lv2:symbol "gain_thirteen";
     lv2:name "Sample Thirteen Gain";
     lv2:minimum -60.0;
@@ -233,7 +245,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 17;
+    lv2:index 18;
     lv2:symbol "gain_fourteen";
     lv2:name "Sample Fourteen Gain";
     lv2:minimum -60.0;
@@ -247,7 +259,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 18;
+    lv2:index 19;
     lv2:symbol "gain_fifteen";
     lv2:name "Sample Fifteen Gain";
     lv2:minimum -60.0;
@@ -261,7 +273,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 19;
+    lv2:index 20;
     lv2:symbol "gain_sixteen";
     lv2:name "Sample Sixteen Gain";
     lv2:minimum -60.0;
@@ -275,7 +287,7 @@
 
  [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 20;
+    lv2:index 21;
     lv2:symbol "gain_seventeen";
     lv2:name "Sample Seventeen Gain";
     lv2:minimum -60.0;
@@ -290,7 +302,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 21;
+    lv2:index 22;
     lv2:symbol "gain_eighteen";
     lv2:name "Sample Eighteen Gain";
     lv2:minimum -60.0;
@@ -304,7 +316,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 22;
+    lv2:index 23;
     lv2:symbol "gain_nineteen";
     lv2:name "Sample Nineteen Gain";
     lv2:minimum -60.0;
@@ -318,7 +330,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 23;
+    lv2:index 24;
     lv2:symbol "gain_twenty";
     lv2:name "Sample Twenty Gain";
     lv2:minimum -60.0;
@@ -332,7 +344,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 24;
+    lv2:index 25;
     lv2:symbol "gain_twentyone";
     lv2:name "Sample Twenty One Gain";
     lv2:minimum -60.0;
@@ -346,7 +358,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 25;
+    lv2:index 26;
     lv2:symbol "gain_twentytwo";
     lv2:name "Sample Twenty Two Gain";
     lv2:minimum -60.0;
@@ -360,7 +372,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 26;
+    lv2:index 27;
     lv2:symbol "gain_twentythree";
     lv2:name "Sample Twenty Three Gain";
     lv2:minimum -60.0;
@@ -374,7 +386,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 27;
+    lv2:index 28;
     lv2:symbol "gain_twentyfour";
     lv2:name "Sample Twenty Four Gain";
     lv2:minimum -60.0;
@@ -388,7 +400,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 28;
+    lv2:index 29;
     lv2:symbol "gain_twentyfive";
     lv2:name "Sample Twenty Five Gain";
     lv2:minimum -60.0;
@@ -402,7 +414,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 29;
+    lv2:index 30;
     lv2:symbol "gain_twentysix";
     lv2:name "Sample Twenty Six Gain";
     lv2:minimum -60.0;
@@ -416,7 +428,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 30;
+    lv2:index 31;
     lv2:symbol "gain_twentyseven";
     lv2:name "Sample Twenty Seven Gain";
     lv2:minimum -60.0;
@@ -430,7 +442,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 31;
+    lv2:index 32;
     lv2:symbol "gain_twentyeight";
     lv2:name "Sample Twenty Eight Gain";
     lv2:minimum -60.0;
@@ -444,7 +456,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 32;
+    lv2:index 33;
     lv2:symbol "gain_twentynine";
     lv2:name "Sample Twenty Nine Gain";
     lv2:minimum -60.0;
@@ -458,7 +470,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 33;
+    lv2:index 34;
     lv2:symbol "gain_thirty";
     lv2:name "Sample Thirty Gain";
     lv2:minimum -60.0;
@@ -472,7 +484,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 34;
+    lv2:index 35;
     lv2:symbol "gain_thirtyone";
     lv2:name "Sample Thirty One Gain";
     lv2:minimum -60.0;
@@ -486,7 +498,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 35;
+    lv2:index 36;
     lv2:symbol "gain_thirtytwo";
     lv2:name "Sample Thirty Two Gain";
     lv2:minimum -60.0;
@@ -500,7 +512,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 36;
+    lv2:index 37;
     lv2:symbol "pan_one";
     lv2:name "Sample One Pan";
     lv2:minimum -1.0;
@@ -510,7 +522,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 37;
+    lv2:index 38;
     lv2:symbol "pan_two";
     lv2:name "Sample Two Pan";
     lv2:minimum -1.0;
@@ -520,7 +532,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 38;
+    lv2:index 39;
     lv2:symbol "pan_three";
     lv2:name "Sample Three Pan";
     lv2:minimum -1.0;
@@ -530,7 +542,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 39;
+    lv2:index 40;
     lv2:symbol "pan_four";
     lv2:name "Sample Four Pan";
     lv2:minimum -1.0;
@@ -540,7 +552,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 40;
+    lv2:index 41;
     lv2:symbol "pan_five";
     lv2:name "Sample Five Pan";
     lv2:minimum -1.0;
@@ -550,7 +562,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 41;
+    lv2:index 42;
     lv2:symbol "pan_six";
     lv2:name "Sample Six Pan";
     lv2:minimum -1.0;
@@ -560,7 +572,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 42;
+    lv2:index 43;
     lv2:symbol "pan_seven";
     lv2:name "Sample Seven Pan";
     lv2:minimum -1.0;
@@ -570,7 +582,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 43;
+    lv2:index 44;
     lv2:symbol "pan_eight";
     lv2:name "Sample Eight Pan";
     lv2:minimum -1.0;
@@ -580,7 +592,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 44;
+    lv2:index 45;
     lv2:symbol "pan_nine";
     lv2:name "Sample Nine Pan";
     lv2:minimum -1.0;
@@ -590,7 +602,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 45;
+    lv2:index 46;
     lv2:symbol "pan_ten";
     lv2:name "Sample Ten Pan";
     lv2:minimum -1.0;
@@ -600,7 +612,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 46;
+    lv2:index 47;
     lv2:symbol "pan_eleven";
     lv2:name "Sample Eleven Pan";
     lv2:minimum -1.0;
@@ -610,7 +622,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 47;
+    lv2:index 48;
     lv2:symbol "pan_twelve";
     lv2:name "Sample Twelve Pan";
     lv2:minimum -1.0;
@@ -620,7 +632,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 48;
+    lv2:index 49;
     lv2:symbol "pan_thirteen";
     lv2:name "Sample Thirteen Pan";
     lv2:minimum -1.0;
@@ -630,7 +642,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 49;
+    lv2:index 50;
     lv2:symbol "pan_fourteen";
     lv2:name "Sample Fourteen Pan";
     lv2:minimum -1.0;
@@ -640,7 +652,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 50;
+    lv2:index 51;
     lv2:symbol "pan_fifteen";
     lv2:name "Sample Fifteen Pan";
     lv2:minimum -1.0;
@@ -650,7 +662,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 51;
+    lv2:index 52;
     lv2:symbol "pan_sixteen";
     lv2:name "Sample Sixteen Pan";
     lv2:minimum -1.0;
@@ -660,7 +672,7 @@
 
  [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 52;
+    lv2:index 53;
     lv2:symbol "pan_seventeen";
     lv2:name "Sample Seventeen Pan";
     lv2:minimum -1.0;
@@ -675,7 +687,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 53;
+    lv2:index 54;
     lv2:symbol "pan_eighteen";
     lv2:name "Sample Eighteen Pan";
     lv2:minimum -1.0;
@@ -689,7 +701,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 54;
+    lv2:index 55;
     lv2:symbol "pan_nineteen";
     lv2:name "Sample Nineteen Pan";
     lv2:minimum -1.0;
@@ -703,7 +715,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 55;
+    lv2:index 56;
     lv2:symbol "pan_twenty";
     lv2:name "Sample Twenty Pan";
     lv2:minimum -1.0;
@@ -717,7 +729,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 56;
+    lv2:index 57;
     lv2:symbol "pan_twentyone";
     lv2:name "Sample Twenty One Pan";
     lv2:minimum -1.0;
@@ -731,7 +743,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 57;
+    lv2:index 58;
     lv2:symbol "pan_twentytwo";
     lv2:name "Sample Twenty Two Pan";
     lv2:minimum -1.0;
@@ -745,7 +757,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 58;
+    lv2:index 59;
     lv2:symbol "pan_twentythree";
     lv2:name "Sample Twenty Three Pan";
     lv2:minimum -1.0;
@@ -759,7 +771,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 59;
+    lv2:index 60;
     lv2:symbol "pan_twentyfour";
     lv2:name "Sample Twenty Four Pan";
     lv2:minimum -1.0;
@@ -773,7 +785,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 60;
+    lv2:index 61;
     lv2:symbol "pan_twentyfive";
     lv2:name "Sample Twenty Five Pan";
     lv2:minimum -1.0;
@@ -787,7 +799,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 61;
+    lv2:index 62;
     lv2:symbol "pan_twentysix";
     lv2:name "Sample Twenty Six Pan";
     lv2:minimum -1.0;
@@ -801,7 +813,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 62;
+    lv2:index 63;
     lv2:symbol "pan_twentyseven";
     lv2:name "Sample Twenty Seven Pan";
     lv2:minimum -1.0;
@@ -815,7 +827,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 63;
+    lv2:index 64;
     lv2:symbol "pan_twentyeight";
     lv2:name "Sample Twenty Eight Pan";
     lv2:minimum -1.0;
@@ -829,7 +841,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 64;
+    lv2:index 65;
     lv2:symbol "pan_twentynine";
     lv2:name "Sample Twenty Nine Pan";
     lv2:minimum -1.0;
@@ -843,7 +855,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 65;
+    lv2:index 66;
     lv2:symbol "pan_thirty";
     lv2:name "Sample Thirty Pan";
     lv2:minimum -1.0;
@@ -857,7 +869,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 66;
+    lv2:index 67;
     lv2:symbol "pan_thirtyone";
     lv2:name "Sample Thirty One Pan";
     lv2:minimum -1.0;
@@ -871,7 +883,7 @@
 
   [
     a lv2:ControlPort, lv2:InputPort;
-    lv2:index 67;
+    lv2:index 68;
     lv2:symbol "pan_thirtytwo";
     lv2:name "Sample Thirty Two Pan";
     lv2:minimum -1.0;
diff --git a/drmr_ui.c b/drmr_ui.c
index 78d33a5..6bcb46d 100644
--- a/drmr_ui.c
+++ b/drmr_ui.c
@@ -31,6 +31,7 @@ typedef struct {
   GtkWidget *drmr_widget;
   GtkTable *sample_table;
   GtkComboBox *kit_combo;
+  GtkLabel *base_label;
   GtkListStore *kit_store;
   GtkWidget** gain_sliders;
   GtkWidget** pan_sliders;
@@ -122,7 +123,7 @@ static void fill_sample_table(DrMrUi* ui, int samples, GtkWidget** gain_sliders,
   }
 }
 
-void kit_combobox_changed(GtkComboBox* box, gpointer data) {
+static void kit_combobox_changed(GtkComboBox* box, gpointer data) {
   DrMrUi* ui = (DrMrUi*)data;
   gint new_kit = gtk_combo_box_get_active (GTK_COMBO_BOX(box));
   float fkit = (float)new_kit;
@@ -130,6 +131,28 @@ void kit_combobox_changed(GtkComboBox* box, gpointer data) {
     ui->write(ui->controller,DRMR_KITNUM,4,0,&fkit);
 }
 
+static const char* nstrs = "C C#D D#E F F#G G#A A#B ";
+static char baseLabelBuf[32];
+static void setBaseLabel(int noteIdx) {
+  int oct = (noteIdx/12)-1;
+  int nmt = (noteIdx%12)*2;
+  snprintf(baseLabelBuf,32,"Midi Base Note <b>(%c%c%i)</b>:",
+	   nstrs[nmt],nstrs[nmt+1],oct);
+}
+
+static void base_changed(GtkSpinButton *base_spin, gpointer data) {
+  DrMrUi* ui = (DrMrUi*)data;
+  float base = (float)gtk_spin_button_get_value(base_spin);
+
+  if (base >= 21.0f && base <= 107.0f) {
+    setBaseLabel((int)base);
+    ui->write(ui->controller,DRMR_BASENOTE,4,0,&base);
+    gtk_label_set_markup(ui->base_label,baseLabelBuf);
+  }
+  else
+    fprintf(stderr,"Base spin got out of range: %f\n",base);
+}
+
 static void fill_kit_combo(GtkComboBox* combo, kits* kits) {
   int i;
   GtkTreeIter iter;
@@ -142,15 +165,16 @@ static void fill_kit_combo(GtkComboBox* combo, kits* kits) {
 
 static void build_drmr_ui(DrMrUi* ui) {
   GtkWidget *drmr_ui_widget;
-  GtkWidget *kit_hbox, *kit_combo_box, *kit_label;
+  GtkWidget *opts_hbox, *kit_combo_box, *kit_label, *base_label, *base_spin;
   GtkCellRenderer *cell_rend;
+  GtkAdjustment *base_adj;
   
   drmr_ui_widget = gtk_vbox_new(false,0);
   g_object_set(drmr_ui_widget,"border-width",6,NULL);
 
   ui->kit_store = gtk_list_store_new(1,G_TYPE_STRING);
 
-  kit_hbox = gtk_hbox_new(false,0);
+  opts_hbox = gtk_hbox_new(false,0);
   kit_combo_box = gtk_combo_box_new_with_model(GTK_TREE_MODEL(ui->kit_store));
   kit_label = gtk_label_new("Kit:");
 
@@ -158,19 +182,35 @@ static void build_drmr_ui(DrMrUi* ui) {
   gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(kit_combo_box), cell_rend, true);
   gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(kit_combo_box), cell_rend,"text",0,NULL);
 
-  gtk_box_pack_start(GTK_BOX(kit_hbox),kit_label,
+  base_label = gtk_label_new("Midi Base Note <b>(C 2)</b>:");
+  gtk_label_set_use_markup(GTK_LABEL(base_label),true);
+  base_adj = GTK_ADJUSTMENT
+    (gtk_adjustment_new(36.0, // val
+			21.0,107.0, // min/max
+			1.0, // step
+			5.0,5.0)); // page adj/size
+  base_spin = gtk_spin_button_new(base_adj, 1.0, 0);
+
+  gtk_box_pack_start(GTK_BOX(opts_hbox),kit_label,
 		     false,false,15);
-  gtk_box_pack_start(GTK_BOX(kit_hbox),kit_combo_box,
+  gtk_box_pack_start(GTK_BOX(opts_hbox),kit_combo_box,
 		     true,true,0);
-  gtk_box_pack_start(GTK_BOX(drmr_ui_widget),kit_hbox,
+  gtk_box_pack_start(GTK_BOX(opts_hbox),base_label,
+		     false,false,15);
+  gtk_box_pack_start(GTK_BOX(opts_hbox),base_spin,
+		     true,true,0);
+  gtk_box_pack_start(GTK_BOX(drmr_ui_widget),opts_hbox,
 		     false,false,5);
 
+
   ui->drmr_widget = drmr_ui_widget;
   ui->sample_table = NULL;
   ui->kit_combo = GTK_COMBO_BOX(kit_combo_box);
+  ui->base_label = GTK_LABEL(base_label);
 
 
   g_signal_connect(G_OBJECT(kit_combo_box),"changed",G_CALLBACK(kit_combobox_changed),ui);
+  g_signal_connect(G_OBJECT(base_spin),"value-changed",G_CALLBACK(base_changed),ui);
 
   gtk_widget_show_all(drmr_ui_widget);
 }