diff --git a/MicroDexed.ino b/MicroDexed.ino
index 9bc0995..b886dae 100644
--- a/MicroDexed.ino
+++ b/MicroDexed.ino
@@ -221,7 +221,7 @@ void note_on(void)
   queue_midi_event(0x90, TEST_NOTE + 32, random(TEST_VEL_MIN, TEST_VEL_MAX));      // 9
   queue_midi_event(0x90, TEST_NOTE + 37, random(TEST_VEL_MIN, TEST_VEL_MAX));      // 10
   queue_midi_event(0x90, TEST_NOTE + 40, random(TEST_VEL_MIN, TEST_VEL_MAX));      // 11
-  queue_midi_event(0x90, TEST_NOTE + 44, random(TEST_VEL_MIN, TEST_VEL_MAX));      // 12
+  queue_midi_event(0x90, TEST_NOTE + 46, random(TEST_VEL_MIN, TEST_VEL_MAX));      // 12
   queue_midi_event(0x90, TEST_NOTE + 49, random(TEST_VEL_MIN, TEST_VEL_MAX));      // 13
   queue_midi_event(0x90, TEST_NOTE + 52, random(TEST_VEL_MIN, TEST_VEL_MAX));      // 14
   queue_midi_event(0x90, TEST_NOTE + 57, random(TEST_VEL_MIN, TEST_VEL_MAX));      // 15
@@ -241,18 +241,13 @@ void note_off(void)
   queue_midi_event(0x80, TEST_NOTE + 32, 0);      // 9
   queue_midi_event(0x80, TEST_NOTE + 37, 0);      // 10
   queue_midi_event(0x80, TEST_NOTE + 40, 0);      // 11
-  queue_midi_event(0x80, TEST_NOTE + 44, 0);      // 12
+  queue_midi_event(0x80, TEST_NOTE + 46, 0);      // 12
   queue_midi_event(0x80, TEST_NOTE + 49, 0);      // 13
   queue_midi_event(0x80, TEST_NOTE + 52, 0);      // 14
   queue_midi_event(0x80, TEST_NOTE + 57, 0);      // 15
   queue_midi_event(0x80, TEST_NOTE + 60, 0);      // 16
 
-  //bool success=true;
-  //bool success = load_sysex("ROM1A.SYX", (++_voice_counter)-1);
-  //bool success=load_sysex("ROM1B.SYX", (++_voice_counter)-1);
-  //bool success=load_sysex("RITCH01-32.SYX", (++_voice_counter)-1);
-  //bool success=load_sysex("RITCH33-64.SYX", (++_voice_counter)-1);
-  bool success = load_sysex(DEFAULT_SYSEXFILE, (++_voice_counter) - 1);
+  bool success = load_sysex(DEFAULT_SYSEXBANK, (++_voice_counter) - 1);
   if (success == false)
     Serial.println(F("E: Cannot load SYSEX data"));
   else
diff --git a/config.h b/config.h
index ba33875..12ae091 100644
--- a/config.h
+++ b/config.h
@@ -31,8 +31,8 @@
 #define SERIAL_SPEED 38400
 #define VOLUME 0.1
 #define SAMPLE_RATE 44100
-#define DEXED_ENGINE DEXED_ENGINE_MODERN
-//#define USE_ONBOARD_USB_HOST 1
+//#define DEXED_ENGINE DEXED_ENGINE_MODERN
+#define USE_ONBOARD_USB_HOST 1
 //#define SHOW_DEXED_TIMING 1
 #define SHOW_MIDI_EVENT 1
 #define SHOW_XRUN 1
@@ -47,6 +47,8 @@
 #define MASTER_NUM1 24          // C1
 #define MASTER_BANK_SELECT 83   // B5
 
+#define USE_TEENSY_DSP 1
+
 // Use these with the Teensy Audio Shield
 #define SDCARD_CS_PIN    10
 #define SDCARD_MOSI_PIN  7
diff --git a/dexed.cpp b/dexed.cpp
index 0894cf2..6f4a67c 100644
--- a/dexed.cpp
+++ b/dexed.cpp
@@ -34,6 +34,9 @@
 #include "controllers.h"
 #include <unistd.h>
 #include <limits.h>
+#ifdef USE_TEENSY_DSP
+#include <Audio.h>
+#endif
 
 extern uint8_t bank;
 extern bool load_sysex(uint8_t bank, uint8_t voice_number);
@@ -140,7 +143,11 @@ void Dexed::getSamples(uint16_t n_samples, int16_t* buffer)
         for (uint8_t j = 0; j < _N_; ++j) {
           int32_t val = audiobuf.get()[j];
           val = val >> 4;
+#ifdef USE_TEENSY_DSP
+          int32_t clip_val=signed_saturate_rshift(32,24,9);
+#else
           int32_t clip_val = val < -(1 << 24) ? 0x8000 : val >= (1 << 24) ? 0x7fff : val >> 9;
+#endif
           float f = static_cast<float>(clip_val >> 1) / 0x8000;
           if (f > 1) f = 1;
           if (f < -1) f = -1;