diff --git a/src/effect_compressor.cpp b/src/effect_compressor.cpp
index d2aaec7..1b35c26 100644
--- a/src/effect_compressor.cpp
+++ b/src/effect_compressor.cpp
@@ -12,6 +12,7 @@
    MIT License.  use at your own risk.
 */
 
+#include <algorithm>
 #include <circle/logger.h>
 #include <cstdlib>
 #include "effect_compressor.h"
@@ -203,7 +204,7 @@ void Compressor::setPreGain_dB(float32_t gain_dB)
 
 void Compressor::setCompressionRatio(float32_t cr)
 {
-      comp_ratio = max(0.001f, cr); //limit to positive values
+      comp_ratio = std::max(0.001f, cr); //limit to positive values
       updateThresholdAndCompRatioConstants();
 }
 
@@ -213,7 +214,7 @@ void Compressor::setAttack_sec(float32_t a, float32_t fs_Hz)
       attack_const = expf(-1.0f / (attack_sec * fs_Hz)); //expf() is much faster than exp()
 
       //also update the time constant for the envelope extraction
-      setLevelTimeConst_sec(min(attack_sec,release_sec) / 5.0, fs_Hz);  //make the level time-constant one-fifth the gain time constants
+      setLevelTimeConst_sec(std::min(attack_sec,release_sec) / 5.0, fs_Hz);  //make the level time-constant one-fifth the gain time constants
 } 
 
 void Compressor::setRelease_sec(float32_t r, float32_t fs_Hz)
@@ -222,13 +223,13 @@ void Compressor::setRelease_sec(float32_t r, float32_t fs_Hz)
       release_const = expf(-1.0f / (release_sec * fs_Hz)); //expf() is much faster than exp()
 
       //also update the time constant for the envelope extraction
-      setLevelTimeConst_sec(min(attack_sec,release_sec) / 5.0, fs_Hz);  //make the level time-constant one-fifth the gain time constants
+      setLevelTimeConst_sec(std::min(attack_sec,release_sec) / 5.0, fs_Hz);  //make the level time-constant one-fifth the gain time constants
 }
 
 void Compressor::setLevelTimeConst_sec(float32_t t_sec, float32_t fs_Hz)
 {
       const float32_t min_t_sec = 0.002f;  //this is the minimum allowed value
-      level_lp_sec = max(min_t_sec,t_sec);
+      level_lp_sec = std::max(min_t_sec,t_sec);
       level_lp_const = expf(-1.0f / (level_lp_sec * fs_Hz)); //expf() is much faster than exp()
 }
 
diff --git a/src/mididevice.cpp b/src/mididevice.cpp
index 216b466..17f8423 100644
--- a/src/mididevice.cpp
+++ b/src/mididevice.cpp
@@ -44,6 +44,7 @@ LOGMODULE ("mididevice");
 	#define MIDI_CC_PAN_POSITION		10
 	#define MIDI_CC_BANK_SELECT_LSB		32
 	#define MIDI_CC_BANK_SUSTAIN		64
+	#define MIDI_CC_BANK_SOSTENUTO		66
 	#define MIDI_CC_RESONANCE			71
 	#define MIDI_CC_FREQUENCY_CUTOFF	74
 	#define MIDI_CC_REVERB_LEVEL		91
@@ -409,6 +410,10 @@ void CMIDIDevice::MIDIMessageHandler (const u8 *pMessage, size_t nLength, unsign
 						case MIDI_CC_BANK_SUSTAIN:
 							m_pSynthesizer->setSustain (pMessage[2] >= 64, nTG);
 							break;
+
+						case MIDI_CC_BANK_SOSTENUTO:
+							m_pSynthesizer->setSostenuto (pMessage[2] >= 64, nTG);
+							break;
 		
 						case MIDI_CC_RESONANCE:
 							m_pSynthesizer->SetResonance (maplong (pMessage[2], 0, 127, 0, 99), nTG);
diff --git a/src/minidexed.cpp b/src/minidexed.cpp
index a485981..1fb16b5 100644
--- a/src/minidexed.cpp
+++ b/src/minidexed.cpp
@@ -830,6 +830,15 @@ void CMiniDexed::setSustain(bool sustain, unsigned nTG)
 	m_pTG[nTG]->setSustain (sustain);
 }
 
+void CMiniDexed::setSostenuto(bool sostenuto, unsigned nTG)
+{
+	assert (nTG < CConfig::AllToneGenerators);
+	if (nTG >= m_nToneGenerators) return;  // Not an active TG
+
+	assert (m_pTG[nTG]);
+	m_pTG[nTG]->setSostenuto (sostenuto);
+}
+
 void CMiniDexed::panic(uint8_t value, unsigned nTG)
 {
 	assert (nTG < CConfig::AllToneGenerators);
diff --git a/src/minidexed.h b/src/minidexed.h
index bb6290b..199adfc 100644
--- a/src/minidexed.h
+++ b/src/minidexed.h
@@ -84,6 +84,7 @@ public:
 	void keydown (int16_t pitch, uint8_t velocity, unsigned nTG);
 
 	void setSustain (bool sustain, unsigned nTG);
+	void setSostenuto (bool sostenuto, unsigned nTG);
 	void panic (uint8_t value, unsigned nTG);
 	void notesOff (uint8_t value, unsigned nTG);
 	void setModWheel (uint8_t value, unsigned nTG);
diff --git a/submod.sh b/submod.sh
index f9524a3..5beea0b 100755
--- a/submod.sh
+++ b/submod.sh
@@ -12,7 +12,7 @@ cd -
 #
 # Optional update submodules explicitly
 cd circle-stdlib/libs/circle
-git checkout fff3764
+git checkout c243194
 cd -
 cd circle-stdlib/libs/circle-newlib
 #git checkout develop
@@ -20,5 +20,5 @@ cd -
 #
 # Use fixed master branch of Synth_Dexed
 cd Synth_Dexed/
-git checkout c9f5274
+git checkout 919f71f
 cd -