diff --git a/sequencer.cpp b/sequencer.cpp
index c6eaeac..e5ffada 100644
--- a/sequencer.cpp
+++ b/sequencer.cpp
@@ -39,81 +39,85 @@ void sequencer_part1(void)
 
   for (uint8_t d = 0; d < NUM_SEQ_TRACKS; d++)
   {
-    if ( seq_track_type[d] == 0) { // drum track (drum samples and pitched one-shot samples)
-      if (seq_data[ seq_patternchain[seq_chain_active_step][d] ][seq_step] > 0 )
-      {
-        if (seq_vel[ seq_patternchain[seq_chain_active_step][d] ][seq_step] > 209)  // it is a pitched sample
+    if (seq_patternchain[seq_chain_active_step][d] != 99 )  // sequence not empty
+    {
+      if ( seq_track_type[d] == 0)
+      { // drum track (drum samples and pitched one-shot samples)
+        if (seq_data[ seq_patternchain[seq_chain_active_step][d] ][seq_step] > 0 )
         {
-          // Drum[slot]->setPlaybackRate( pow (2, (inNote - 72) / 12.00) * drum_config[sample].pitch ); get_sample_vol_max(sample)
-          set_sample_pitch(seq_vel[ seq_patternchain[seq_chain_active_step][d] ][seq_step] - 210 , (float)pow (2, (seq_data[ seq_patternchain[seq_chain_active_step][d] ][seq_step] - 72) / 12.00) * get_sample_p_offset( seq_vel[ seq_patternchain[seq_chain_active_step][d] ][seq_step] - 210 ) );
-          handleNoteOn(drum_midi_channel, seq_vel[ seq_patternchain[seq_chain_active_step][d] ][seq_step] , 90 );    
+          if (seq_vel[ seq_patternchain[seq_chain_active_step][d] ][seq_step] > 209)  // it is a pitched sample
+          {
+            // Drum[slot]->setPlaybackRate( pow (2, (inNote - 72) / 12.00) * drum_config[sample].pitch ); get_sample_vol_max(sample)
+            set_sample_pitch(seq_vel[ seq_patternchain[seq_chain_active_step][d] ][seq_step] - 210 , (float)pow (2, (seq_data[ seq_patternchain[seq_chain_active_step][d] ][seq_step] - 72) / 12.00) * get_sample_p_offset( seq_vel[ seq_patternchain[seq_chain_active_step][d] ][seq_step] - 210 ) );
+            handleNoteOn(drum_midi_channel, seq_vel[ seq_patternchain[seq_chain_active_step][d] ][seq_step] , 90 );
+          }
+          else // else play normal drum sample
+            handleNoteOn(drum_midi_channel, seq_data[ seq_patternchain[seq_chain_active_step][d] ][seq_step] , seq_vel[ seq_patternchain[seq_chain_active_step][d] ][seq_step]);
         }
-        else // else play normal drum sample
-          handleNoteOn(drum_midi_channel, seq_data[ seq_patternchain[seq_chain_active_step][d] ][seq_step] , seq_vel[ seq_patternchain[seq_chain_active_step][d] ][seq_step]);
       }
-    }
-    else {
-      if (seq_data[seq_patternchain[seq_chain_active_step][d]][seq_step] > 0 )  // instrument track
-      {
-        if (seq_track_type[d] == 1 || (seq_track_type[d] == 3 && arp_play_basenote) )
+      else {
+        if (seq_data[seq_patternchain[seq_chain_active_step][d]][seq_step] > 0 )  // instrument track
         {
-          if (seq_data[seq_patternchain[seq_chain_active_step][d]][seq_step] != 130 )
+          if (seq_track_type[d] == 1 || (seq_track_type[d] == 3 && arp_play_basenote) )
           {
-            handleNoteOn(configuration.dexed[seq_inst_dexed[d]].midi_channel, seq_data[ seq_patternchain[seq_chain_active_step][d] ][seq_step], seq_vel[ seq_patternchain[seq_chain_active_step][d] ][seq_step]);
-            seq_prev_note[d] = seq_data[ seq_patternchain[seq_chain_active_step][d] ][seq_step];
-            seq_prev_vel[d] = seq_vel[ seq_patternchain[seq_chain_active_step][d] ][seq_step];
+            if (seq_data[seq_patternchain[seq_chain_active_step][d]][seq_step] != 130 )
+            {
+              handleNoteOn(configuration.dexed[seq_inst_dexed[d]].midi_channel, seq_data[ seq_patternchain[seq_chain_active_step][d] ][seq_step], seq_vel[ seq_patternchain[seq_chain_active_step][d] ][seq_step]);
+              seq_prev_note[d] = seq_data[ seq_patternchain[seq_chain_active_step][d] ][seq_step];
+              seq_prev_vel[d] = seq_vel[ seq_patternchain[seq_chain_active_step][d] ][seq_step];
+            }
           }
-        }
-        else if (seq_track_type[d] == 2  ) //Chords
-        {
-          if (seq_vel[ seq_patternchain[seq_chain_active_step][d]][seq_step] > 199)
+          else if (seq_track_type[d] == 2  ) //Chords
           {
+            if (seq_vel[ seq_patternchain[seq_chain_active_step][d]][seq_step] > 199)
+            {
 
-            //handleNoteOn(configuration.dexed[seq_inst_dexed[d]].midi_channel, seq_data[ seq_patternchain[seq_chain_active_step][d] ][seq_step], seq_chord_velocity);  // basenote
+              //handleNoteOn(configuration.dexed[seq_inst_dexed[d]].midi_channel, seq_data[ seq_patternchain[seq_chain_active_step][d] ][seq_step], seq_chord_velocity);  // basenote
 
-            for (uint8_t x = seq_element_shift; x < seq_element_shift + seq_chord_key_ammount; x++) //play chord notes
-            {
-              handleNoteOn(configuration.dexed[seq_chord_dexed_inst].midi_channel, seq_data[ seq_patternchain[seq_chain_active_step][d] ][seq_step] + (seq_oct_shift * 12) + seq_arps[seq_vel[ seq_patternchain[seq_chain_active_step][d] ][seq_step] - 200][x], seq_chord_velocity);
+              for (uint8_t x = seq_element_shift; x < seq_element_shift + seq_chord_key_ammount; x++) //play chord notes
+              {
+                handleNoteOn(configuration.dexed[seq_chord_dexed_inst].midi_channel, seq_data[ seq_patternchain[seq_chain_active_step][d] ][seq_step] + (seq_oct_shift * 12) + seq_arps[seq_vel[ seq_patternchain[seq_chain_active_step][d] ][seq_step] - 200][x], seq_chord_velocity);
+              }
+              seq_prev_note[d] = seq_data[seq_patternchain[seq_chain_active_step][d]][seq_step] + (seq_oct_shift * 12);
+              seq_prev_vel[d] = seq_vel[seq_patternchain[seq_chain_active_step][d]][seq_step];
             }
-            seq_prev_note[d] = seq_data[seq_patternchain[seq_chain_active_step][d]][seq_step] + (seq_oct_shift * 12);
-            seq_prev_vel[d] = seq_vel[seq_patternchain[seq_chain_active_step][d]][seq_step];
+          }
+          if (seq_track_type[d] == 3) {  //Arp
+            arp_step = 0;
+            arp_counter = 0;
+            arp_note = seq_data[ seq_patternchain[seq_chain_active_step][d] ][seq_step] + (seq_oct_shift * 12);
+            arp_chord = seq_vel[seq_patternchain[seq_chain_active_step][d] ][seq_step] - 200;
           }
         }
-        if (seq_track_type[d] == 3) {  //Arp
-          arp_step = 0;
-          arp_counter = 0;
-          arp_note = seq_data[ seq_patternchain[seq_chain_active_step][d] ][seq_step] + (seq_oct_shift * 12);
-          arp_chord = seq_vel[seq_patternchain[seq_chain_active_step][d] ][seq_step] - 200;
-        }
-      }
 
-      // after here not triggered by a key input -  arp only
-      if (seq_track_type[d] == 3)
-      { //Arp
-        if (arp_speed == 0 || (arp_speed == 1 && arp_counter == 0) ) {
+        // after here not triggered by a key input -  arp only
+        if (seq_track_type[d] == 3)
+        { //Arp
+          if (arp_speed == 0 || (arp_speed == 1 && arp_counter == 0) ) {
 
-        { if (arp_style == 0) { //arp up
-              handleNoteOn(configuration.dexed[seq_chord_dexed_inst].midi_channel, arp_note + seq_arps[arp_chord][arp_step + seq_element_shift], seq_chord_velocity);
-              arp_note_prev = arp_note + seq_arps[arp_chord][arp_step + seq_element_shift] ;
-            }
-            else if (arp_style == 1) { //arp down
-              handleNoteOn(configuration.dexed[seq_chord_dexed_inst].midi_channel, arp_note + seq_arps[arp_chord][arp_lenght - arp_step + seq_element_shift], seq_chord_velocity);
-              arp_note_prev = arp_note + seq_arps[arp_chord][arp_lenght - arp_step + seq_element_shift] ;
-            }
-            else if (arp_style == 2) { //arp up & down
-              if (arp_step <= arp_lenght) {
-                handleNoteOn(configuration.dexed[seq_chord_dexed_inst].midi_channel, arp_note + seq_arps[arp_chord][arp_step ], seq_chord_velocity);
-                arp_note_prev = arp_note + seq_arps[arp_chord][arp_step ] ;
+          { if (arp_style == 0) { //arp up
+                handleNoteOn(configuration.dexed[seq_chord_dexed_inst].midi_channel, arp_note + seq_arps[arp_chord][arp_step + seq_element_shift], seq_chord_velocity);
+                arp_note_prev = arp_note + seq_arps[arp_chord][arp_step + seq_element_shift] ;
               }
-              else {
-                handleNoteOn(configuration.dexed[seq_chord_dexed_inst].midi_channel, arp_note + seq_arps[arp_chord][arp_lenght * 2 - arp_step ], seq_chord_velocity);
-                arp_note_prev = arp_note + seq_arps[arp_chord][arp_lenght * 2 - arp_step ] ;
+              else if (arp_style == 1) { //arp down
+                handleNoteOn(configuration.dexed[seq_chord_dexed_inst].midi_channel, arp_note + seq_arps[arp_chord][arp_lenght - arp_step + seq_element_shift], seq_chord_velocity);
+                arp_note_prev = arp_note + seq_arps[arp_chord][arp_lenght - arp_step + seq_element_shift] ;
+              }
+              else if (arp_style == 2) { //arp up & down
+                if (arp_step <= arp_lenght) {
+                  handleNoteOn(configuration.dexed[seq_chord_dexed_inst].midi_channel, arp_note + seq_arps[arp_chord][arp_step ], seq_chord_velocity);
+                  arp_note_prev = arp_note + seq_arps[arp_chord][arp_step ] ;
+                }
+                else {
+                  handleNoteOn(configuration.dexed[seq_chord_dexed_inst].midi_channel, arp_note + seq_arps[arp_chord][arp_lenght * 2 - arp_step ], seq_chord_velocity);
+                  arp_note_prev = arp_note + seq_arps[arp_chord][arp_lenght * 2 - arp_step ] ;
+                }
+              }
+              else if (arp_style == 3) { //arp random
+                uint8_t rnd1 = random(arp_lenght);
+                handleNoteOn(configuration.dexed[seq_chord_dexed_inst].midi_channel, arp_note + seq_arps[arp_chord][rnd1 + seq_element_shift] + (seq_oct_shift * 12), seq_chord_velocity);
+                arp_note_prev = arp_note + seq_arps[arp_chord][rnd1 + seq_element_shift] + (seq_oct_shift * 12);
               }
-            }
-            else if (arp_style == 3) { //arp random
-              uint8_t rnd1 = random(arp_lenght);
-              handleNoteOn(configuration.dexed[seq_chord_dexed_inst].midi_channel, arp_note + seq_arps[arp_chord][rnd1 + seq_element_shift] + (seq_oct_shift * 12), seq_chord_velocity);
-              arp_note_prev = arp_note + seq_arps[arp_chord][rnd1 + seq_element_shift] + (seq_oct_shift * 12);
             }
           }
         }