diff --git a/src/instr_bd2.hh b/src/instr_bd2.hh
index a556f48..d7b4305 100644
--- a/src/instr_bd2.hh
+++ b/src/instr_bd2.hh
@@ -2,8 +2,6 @@
 #define HECK_OSP_INSTR_BD2_HH
 
 #include "instr_interface.hh"
-#include "daisy_seed.h"
-#include "daisysp.h"
 
 namespace Heck {
     namespace Instrument {
diff --git a/src/instr_fm.hh b/src/instr_fm.hh
index 7252543..cc9d740 100644
--- a/src/instr_fm.hh
+++ b/src/instr_fm.hh
@@ -2,8 +2,6 @@
 #define HECK_OSP_INSTR_FM_HH
 
 #include "instr_interface.hh"
-#include "daisy_seed.h"
-#include "daisysp.h"
 
 namespace Heck {
     namespace Instrument {
diff --git a/src/instr_grainlet.hh b/src/instr_grainlet.hh
index 6a8245d..bee0503 100644
--- a/src/instr_grainlet.hh
+++ b/src/instr_grainlet.hh
@@ -2,8 +2,6 @@
 #define HECK_OSP_INSTR_GRAINLET_HH
 
 #include "instr_interface.hh"
-#include "daisy_seed.h"
-#include "daisysp.h"
 
 namespace Heck {
     namespace Instrument {
diff --git a/src/instr_hihat.hh b/src/instr_hihat.hh
index 4a6f870..21dcbd8 100644
--- a/src/instr_hihat.hh
+++ b/src/instr_hihat.hh
@@ -2,8 +2,6 @@
 #define HECK_OSP_INSTR_HIHAT_HH
 
 #include "instr_interface.hh"
-#include "daisy_seed.h"
-#include "daisysp.h"
 
 namespace Heck {
     namespace Instrument {
diff --git a/src/instr_kick.hh b/src/instr_kick.hh
index 5967df8..365e6c9 100644
--- a/src/instr_kick.hh
+++ b/src/instr_kick.hh
@@ -2,8 +2,6 @@
 #define HECK_OSP_INSTR_KICK_HH
 
 #include "instr_interface.hh"
-#include "daisy_seed.h"
-#include "daisysp.h"
 
 namespace Heck {
     namespace Instrument {
diff --git a/src/instr_noise.hh b/src/instr_noise.hh
index e705791..bfbcb5a 100644
--- a/src/instr_noise.hh
+++ b/src/instr_noise.hh
@@ -2,8 +2,6 @@
 #define HECK_OSP_INSTR_NOISE_HH
 
 #include "instr_interface.hh"
-#include "daisy_seed.h"
-#include "daisysp.h"
 
 namespace Heck {
     namespace Instrument {
diff --git a/src/instr_zosc.hh b/src/instr_zosc.hh
index 3082916..1c930bc 100644
--- a/src/instr_zosc.hh
+++ b/src/instr_zosc.hh
@@ -2,8 +2,6 @@
 #define HECK_OSP_INSTR_ZOSC_HH
 
 #include "instr_interface.hh"
-#include "daisy_seed.h"
-#include "daisysp.h"
 
 namespace Heck {
     namespace Instrument {
diff --git a/src/main_osp.cc b/src/main_osp.cc
index 18fceb3..1818e4e 100644
--- a/src/main_osp.cc
+++ b/src/main_osp.cc
@@ -45,7 +45,7 @@ namespace Heck {
         ld::AudioHandle::InterleavingOutputBuffer out,
         size_t size);
 
-    void midi_realtime_handler(ld::MidiEvent& msg);
+    void midi_realtime_handler(const ld::MidiEvent& msg);
 
 
     void init_tracks()
@@ -142,7 +142,7 @@ namespace Heck {
                 ld::ControlChangeEvent cc = msg.AsControlChange();
                 if (State::clear_mode) {
                     ld::ControlChangeEvent cc = msg.AsControlChange();
-                    hw.PrintLine("Clear: ch: %i, cc: %i",cc.channel,cc.control_number);
+                    hw.PrintLine("Clear: ch: %i, cc: %i", cc.channel, cc.control_number);
                     sequencer.clear_track_cc(cc.channel, cc.control_number);
                 } else {
                     sequencer.midi_in(msg);
diff --git a/src/main_osp.hh b/src/main_osp.hh
index 02d5485..5069d9f 100644
--- a/src/main_osp.hh
+++ b/src/main_osp.hh
@@ -15,7 +15,7 @@ namespace Heck {
             constexpr int PIN_BUTTON_CLEAR = 27;
         }
 
-        constexpr bool CPU_BOOST480MHZ = true;
+        constexpr bool CPU_BOOST480MHZ = false;
         constexpr int AUDIO_BUFFERSIZE = 4;
         constexpr Samplerate AUDIO_SAMPLERATE = Samplerate::SAI_48KHZ;
         constexpr int TRACK_COUNT = 4;
diff --git a/src/track.hh b/src/track.hh
index 8c56177..caa45a2 100644
--- a/src/track.hh
+++ b/src/track.hh
@@ -65,8 +65,9 @@ namespace Heck {
 
         void filter(float val)
         {
-            float ladder_freq = 80 + (val * 9000);
-            ladder_.SetFreq(val * ladder_freq);
+            val *= val;
+            float ladder_freq = 80. + (val * 30000.);
+            ladder_.SetFreq(ladder_freq);
         }
 
         void drive(float amt)