diff --git a/k3ng_keyer/k3ng_keyer.ino b/k3ng_keyer/k3ng_keyer.ino
index 3c0df58..da1e5e8 100644
--- a/k3ng_keyer/k3ng_keyer.ino
+++ b/k3ng_keyer/k3ng_keyer.ino
@@ -1449,6 +1449,12 @@ If you offer a hardware kit using this software, show your appreciation by sendi
   #include "src/buttonarray/buttonarray.h"
 #endif
 
+#if defined(FEATURE_SIDETONE_NEWTONE) && !defined(OPTION_SIDETONE_DIGITAL_OUTPUT_NO_SQUARE_WAVE)
+  #include <NewTone.h>
+  #define tone   NewTone
+  #define noTone noNewTone
+#endif //FEATURE_SIDETONE_NEWTONE
+
 #if defined(FEATURE_SLEEP)
   #include <avr/sleep.h>  // It should be different library for ARM sp5iou
 #endif 
diff --git a/k3ng_keyer/keyer_features_and_options.h b/k3ng_keyer/keyer_features_and_options.h
index e512cbb..d0a6693 100644
--- a/k3ng_keyer/keyer_features_and_options.h
+++ b/k3ng_keyer/keyer_features_and_options.h
@@ -12,6 +12,7 @@
 // #define FEATURE_TRAINING_COMMAND_LINE_INTERFACE
 // #define FEATURE_POTENTIOMETER         // do not enable unless you have a potentiometer connected, otherwise noise will falsely trigger wpm changes
 // #define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h). 
+// #define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 // #define FEATURE_SERIAL_HELP
 // #define FEATURE_HELL
 // #define FEATURE_PS2_KEYBOARD        // Use a PS2 keyboard to send code - Change keyboard layout (non-US) in K3NG_PS2Keyboard.h.  Additional options below.
diff --git a/k3ng_keyer/keyer_features_and_options_fk_10.h b/k3ng_keyer/keyer_features_and_options_fk_10.h
index 793d4dd..94e301e 100644
--- a/k3ng_keyer/keyer_features_and_options_fk_10.h
+++ b/k3ng_keyer/keyer_features_and_options_fk_10.h
@@ -30,6 +30,7 @@
 #define FEATURE_TRAINING_COMMAND_LINE_INTERFACE
 // #define FEATURE_POTENTIOMETER         // do not enable unless you have a potentiometer connected, otherwise noise will falsely trigger wpm changes
 // #define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h). 
+// #define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 #define FEATURE_SERIAL_HELP
 #define FEATURE_HELL
 // #define FEATURE_PS2_KEYBOARD        // Use a PS2 keyboard to send code - Change keyboard layout (non-US) in K3NG_PS2Keyboard.h.  Additional options below.
diff --git a/k3ng_keyer/keyer_features_and_options_fk_11.h b/k3ng_keyer/keyer_features_and_options_fk_11.h
index 883cc24..224b932 100644
--- a/k3ng_keyer/keyer_features_and_options_fk_11.h
+++ b/k3ng_keyer/keyer_features_and_options_fk_11.h
@@ -13,6 +13,7 @@
 #define FEATURE_TRAINING_COMMAND_LINE_INTERFACE
 // #define FEATURE_POTENTIOMETER         // do not enable unless you have a potentiometer connected, otherwise noise will falsely trigger wpm changes
 // #define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h). 
+// #define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 #define FEATURE_SERIAL_HELP
 #define FEATURE_HELL
 // #define FEATURE_PS2_KEYBOARD        // Use a PS2 keyboard to send code - Change keyboard layout (non-US) in K3NG_PS2Keyboard.h.  Additional options below.
diff --git a/k3ng_keyer/keyer_features_and_options_generic_STM32F103C.h b/k3ng_keyer/keyer_features_and_options_generic_STM32F103C.h
old mode 100755
new mode 100644
index 17f1b12..01fd56c
--- a/k3ng_keyer/keyer_features_and_options_generic_STM32F103C.h
+++ b/k3ng_keyer/keyer_features_and_options_generic_STM32F103C.h
@@ -19,6 +19,7 @@ Generic STM32F103C "Blue Pill"
 // #define FEATURE_TRAINING_COMMAND_LINE_INTERFACE
 // #define FEATURE_POTENTIOMETER         // do not enable unless you have a potentiometer connected, otherwise noise will falsely trigger wpm changes
 // #define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h). 
+// #define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 #define FEATURE_SERIAL_HELP
 #define FEATURE_HELL
 // #define FEATURE_PS2_KEYBOARD        // Use a PS2 keyboard to send code - Change keyboard layout (non-US) in K3NG_PS2Keyboard.h.  Additional options below.
diff --git a/k3ng_keyer/keyer_features_and_options_iz3gme.h b/k3ng_keyer/keyer_features_and_options_iz3gme.h
index c5b0e8d..5832650 100644
--- a/k3ng_keyer/keyer_features_and_options_iz3gme.h
+++ b/k3ng_keyer/keyer_features_and_options_iz3gme.h
@@ -12,6 +12,7 @@
 // #define FEATURE_TRAINING_COMMAND_LINE_INTERFACE
 #define FEATURE_POTENTIOMETER         // do not enable unless you have a potentiometer connected, otherwise noise will falsely trigger wpm changes
 // #define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h). 
+// #define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 #define FEATURE_SERIAL_HELP
 // #define FEATURE_HELL
 // #define FEATURE_PS2_KEYBOARD        // Use a PS2 keyboard to send code - Change keyboard layout (non-US) in K3NG_PS2Keyboard.h.  Additional options below.
@@ -120,4 +121,4 @@
 // #define OPTION_DISPLAY_MEMORY_CONTENTS_COMMAND_MODE
 
 //Added in version 2020.07.04.01
-//#define OPTION_WINKEY_PROSIGN_COMPATIBILITY  // Additional character mappings to support K1EL Winkey emulation prosigns
\ No newline at end of file
+//#define OPTION_WINKEY_PROSIGN_COMPATIBILITY  // Additional character mappings to support K1EL Winkey emulation prosigns
diff --git a/k3ng_keyer/keyer_features_and_options_k5bcq.h b/k3ng_keyer/keyer_features_and_options_k5bcq.h
index 381d778..d2b8c0f 100644
--- a/k3ng_keyer/keyer_features_and_options_k5bcq.h
+++ b/k3ng_keyer/keyer_features_and_options_k5bcq.h
@@ -12,6 +12,7 @@
 // #define FEATURE_TRAINING_COMMAND_LINE_INTERFACE
 // #define FEATURE_POTENTIOMETER         // do not enable unless you have a potentiometer connected, otherwise noise will falsely trigger wpm changes
 // #define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h). 
+// #define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 #define FEATURE_SERIAL_HELP
 #define FEATURE_HELL
 #define FEATURE_PS2_KEYBOARD        // Use a PS2 keyboard to send code - Change keyboard layout (non-US) in K3NG_PS2Keyboard.h.  Additional options below.
diff --git a/k3ng_keyer/keyer_features_and_options_maple_mini.h b/k3ng_keyer/keyer_features_and_options_maple_mini.h
index 89b27cf..679e6a4 100644
--- a/k3ng_keyer/keyer_features_and_options_maple_mini.h
+++ b/k3ng_keyer/keyer_features_and_options_maple_mini.h
@@ -26,6 +26,7 @@
 // #define FEATURE_TRAINING_COMMAND_LINE_INTERFACE
 #define FEATURE_POTENTIOMETER         // do not enable unless you have a potentiometer connected, otherwise noise will falsely trigger wpm changes
 // #define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h). 
+// #define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 #define FEATURE_SERIAL_HELP
 #define FEATURE_HELL
 // #define FEATURE_PS2_KEYBOARD        // Use a PS2 keyboard to send code - Change keyboard layout (non-US) in K3NG_PS2Keyboard.h.  Additional options below.
diff --git a/k3ng_keyer/keyer_features_and_options_megakeyer.h b/k3ng_keyer/keyer_features_and_options_megakeyer.h
index 974a183..77320aa 100644
--- a/k3ng_keyer/keyer_features_and_options_megakeyer.h
+++ b/k3ng_keyer/keyer_features_and_options_megakeyer.h
@@ -16,6 +16,7 @@
 #define FEATURE_TRAINING_COMMAND_LINE_INTERFACE
 // #define FEATURE_POTENTIOMETER         // do not enable unless you have a potentiometer connected, otherwise noise will falsely trigger wpm changes
 // #define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h). 
+// #define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 #define FEATURE_SERIAL_HELP
 // #define FEATURE_HELL
 #define FEATURE_PS2_KEYBOARD        // Use a PS2 keyboard to send code - Change keyboard layout (non-US) in K3NG_PS2Keyboard.h.  Additional options below.
@@ -124,4 +125,4 @@
 // #define OPTION_DISPLAY_MEMORY_CONTENTS_COMMAND_MODE
 
 //Added in version 2020.07.04.01
-//#define OPTION_WINKEY_PROSIGN_COMPATIBILITY  // Additional character mappings to support K1EL Winkey emulation prosigns
\ No newline at end of file
+//#define OPTION_WINKEY_PROSIGN_COMPATIBILITY  // Additional character mappings to support K1EL Winkey emulation prosigns
diff --git a/k3ng_keyer/keyer_features_and_options_mortty.h b/k3ng_keyer/keyer_features_and_options_mortty.h
old mode 100755
new mode 100644
index 6332ac0..b55fd81
--- a/k3ng_keyer/keyer_features_and_options_mortty.h
+++ b/k3ng_keyer/keyer_features_and_options_mortty.h
@@ -12,6 +12,7 @@
 // #define FEATURE_TRAINING_COMMAND_LINE_INTERFACE
 // #define FEATURE_POTENTIOMETER         // do not enable unless you have a potentiometer connected, otherwise noise will falsely trigger wpm changes
 // #define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h). 
+// #define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 // #define FEATURE_SERIAL_HELP
 // #define FEATURE_HELL
 // #define FEATURE_PS2_KEYBOARD        // Use a PS2 keyboard to send code - Change keyboard layout (non-US) in K3NG_PS2Keyboard.h.  Additional options below.
diff --git a/k3ng_keyer/keyer_features_and_options_mortty_regular.h b/k3ng_keyer/keyer_features_and_options_mortty_regular.h
old mode 100755
new mode 100644
index 61b8167..2893677
--- a/k3ng_keyer/keyer_features_and_options_mortty_regular.h
+++ b/k3ng_keyer/keyer_features_and_options_mortty_regular.h
@@ -12,6 +12,7 @@
 // #define FEATURE_TRAINING_COMMAND_LINE_INTERFACE
 // #define FEATURE_POTENTIOMETER         // do not enable unless you have a potentiometer connected, otherwise noise will falsely trigger wpm changes
 // #define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h). 
+// #define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 // #define FEATURE_SERIAL_HELP
 // #define FEATURE_HELL
 // #define FEATURE_PS2_KEYBOARD        // Use a PS2 keyboard to send code - Change keyboard layout (non-US) in K3NG_PS2Keyboard.h.  Additional options below.
@@ -108,4 +109,4 @@
 // #define OPTION_DISPLAY_MEMORY_CONTENTS_COMMAND_MODE
 
 //Added in version 2020.07.04.01
-//#define OPTION_WINKEY_PROSIGN_COMPATIBILITY  // Additional character mappings to support K1EL Winkey emulation prosigns
\ No newline at end of file
+//#define OPTION_WINKEY_PROSIGN_COMPATIBILITY  // Additional character mappings to support K1EL Winkey emulation prosigns
diff --git a/k3ng_keyer/keyer_features_and_options_mortty_regular_with_potentiometer.h b/k3ng_keyer/keyer_features_and_options_mortty_regular_with_potentiometer.h
old mode 100755
new mode 100644
index e26b015..d8e3a4e
--- a/k3ng_keyer/keyer_features_and_options_mortty_regular_with_potentiometer.h
+++ b/k3ng_keyer/keyer_features_and_options_mortty_regular_with_potentiometer.h
@@ -12,6 +12,7 @@
 // #define FEATURE_TRAINING_COMMAND_LINE_INTERFACE
 #define FEATURE_POTENTIOMETER         // do not enable unless you have a potentiometer connected, otherwise noise will falsely trigger wpm changes
 // #define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h). 
+// #define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 // #define FEATURE_SERIAL_HELP
 // #define FEATURE_HELL
 // #define FEATURE_PS2_KEYBOARD        // Use a PS2 keyboard to send code - Change keyboard layout (non-US) in K3NG_PS2Keyboard.h.  Additional options below.
@@ -108,4 +109,4 @@
 // #define OPTION_DISPLAY_MEMORY_CONTENTS_COMMAND_MODE
 
 //Added in version 2020.07.04.01
-//#define OPTION_WINKEY_PROSIGN_COMPATIBILITY  // Additional character mappings to support K1EL Winkey emulation prosigns
\ No newline at end of file
+//#define OPTION_WINKEY_PROSIGN_COMPATIBILITY  // Additional character mappings to support K1EL Winkey emulation prosigns
diff --git a/k3ng_keyer/keyer_features_and_options_mortty_so2r.h b/k3ng_keyer/keyer_features_and_options_mortty_so2r.h
old mode 100755
new mode 100644
index 61b8167..2893677
--- a/k3ng_keyer/keyer_features_and_options_mortty_so2r.h
+++ b/k3ng_keyer/keyer_features_and_options_mortty_so2r.h
@@ -12,6 +12,7 @@
 // #define FEATURE_TRAINING_COMMAND_LINE_INTERFACE
 // #define FEATURE_POTENTIOMETER         // do not enable unless you have a potentiometer connected, otherwise noise will falsely trigger wpm changes
 // #define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h). 
+// #define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 // #define FEATURE_SERIAL_HELP
 // #define FEATURE_HELL
 // #define FEATURE_PS2_KEYBOARD        // Use a PS2 keyboard to send code - Change keyboard layout (non-US) in K3NG_PS2Keyboard.h.  Additional options below.
@@ -108,4 +109,4 @@
 // #define OPTION_DISPLAY_MEMORY_CONTENTS_COMMAND_MODE
 
 //Added in version 2020.07.04.01
-//#define OPTION_WINKEY_PROSIGN_COMPATIBILITY  // Additional character mappings to support K1EL Winkey emulation prosigns
\ No newline at end of file
+//#define OPTION_WINKEY_PROSIGN_COMPATIBILITY  // Additional character mappings to support K1EL Winkey emulation prosigns
diff --git a/k3ng_keyer/keyer_features_and_options_nanokeyer_rev_b.h b/k3ng_keyer/keyer_features_and_options_nanokeyer_rev_b.h
index effaf6a..bb079c7 100644
--- a/k3ng_keyer/keyer_features_and_options_nanokeyer_rev_b.h
+++ b/k3ng_keyer/keyer_features_and_options_nanokeyer_rev_b.h
@@ -11,6 +11,7 @@
 //#define FEATURE_TRAINING_COMMAND_LINE_INTERFACE
 #define FEATURE_POTENTIOMETER         // do not enable unless you have a potentiometer connected, otherwise noise will falsely trigger wpm changes
 //#define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h). 
+//#define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 //#define FEATURE_SERIAL_HELP
 //#define FEATURE_HELL
 //#define FEATURE_PS2_KEYBOARD        // Change keyboard layout (non-US in K3NG_PS2Keyboard.h).  Additional options below.
diff --git a/k3ng_keyer/keyer_features_and_options_open_interface.h b/k3ng_keyer/keyer_features_and_options_open_interface.h
index c792c88..4e7e077 100644
--- a/k3ng_keyer/keyer_features_and_options_open_interface.h
+++ b/k3ng_keyer/keyer_features_and_options_open_interface.h
@@ -13,6 +13,7 @@
 #define FEATURE_TRAINING_COMMAND_LINE_INTERFACE
 #define FEATURE_POTENTIOMETER         // do not enable unless you have a potentiometer connected, otherwise noise will falsely trigger wpm changes
 // #define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h). 
+// #define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 #define FEATURE_SERIAL_HELP
 //#define FEATURE_HELL
 //#define FEATURE_PS2_KEYBOARD        // Use a PS2 keyboard to send code - Change keyboard layout (non-US) in K3NG_PS2Keyboard.h.  Additional options below.
diff --git a/k3ng_keyer/keyer_features_and_options_opencwkeyer_mk2.h b/k3ng_keyer/keyer_features_and_options_opencwkeyer_mk2.h
index dc4d3a9..304e3de 100644
--- a/k3ng_keyer/keyer_features_and_options_opencwkeyer_mk2.h
+++ b/k3ng_keyer/keyer_features_and_options_opencwkeyer_mk2.h
@@ -12,6 +12,7 @@
 // #define FEATURE_TRAINING_COMMAND_LINE_INTERFACE
 #define FEATURE_POTENTIOMETER         // do not enable unless you have a potentiometer connected, otherwise noise will falsely trigger wpm changes
 // #define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h). 
+// #define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 // #define FEATURE_SERIAL_HELP
 // #define FEATURE_HELL
 // #define FEATURE_PS2_KEYBOARD        // Use a PS2 keyboard to send code - Change keyboard layout (non-US) in K3NG_PS2Keyboard.h.  Additional options below.
@@ -120,4 +121,4 @@
 // #define OPTION_DISPLAY_MEMORY_CONTENTS_COMMAND_MODE
 
 //Added in version 2020.07.04.01
-//#define OPTION_WINKEY_PROSIGN_COMPATIBILITY  // Additional character mappings to support K1EL Winkey emulation prosigns
\ No newline at end of file
+//#define OPTION_WINKEY_PROSIGN_COMPATIBILITY  // Additional character mappings to support K1EL Winkey emulation prosigns
diff --git a/k3ng_keyer/keyer_features_and_options_test.h b/k3ng_keyer/keyer_features_and_options_test.h
index a12ec51..5952421 100644
--- a/k3ng_keyer/keyer_features_and_options_test.h
+++ b/k3ng_keyer/keyer_features_and_options_test.h
@@ -23,6 +23,7 @@
 // #define FEATURE_TRAINING_COMMAND_LINE_INTERFACE
 // #define FEATURE_POTENTIOMETER         // do not enable unless you have a potentiometer connected, otherwise noise will falsely trigger wpm changes
 // #define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h). 
+// #define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 // #define FEATURE_SERIAL_HELP
 // #define FEATURE_HELL
 // #define FEATURE_PS2_KEYBOARD        // Use a PS2 keyboard to send code - Change keyboard layout (non-US) in K3NG_PS2Keyboard.h.  Additional options below.
diff --git a/k3ng_keyer/keyer_features_and_options_test_everything.h b/k3ng_keyer/keyer_features_and_options_test_everything.h
index c5900ee..a04867e 100644
--- a/k3ng_keyer/keyer_features_and_options_test_everything.h
+++ b/k3ng_keyer/keyer_features_and_options_test_everything.h
@@ -11,6 +11,7 @@
 #define FEATURE_TRAINING_COMMAND_LINE_INTERFACE
 #define FEATURE_POTENTIOMETER         // do not enable unless you have a potentiometer connected, otherwise noise will falsely trigger wpm changes
 #define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h). 
+#define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 #define FEATURE_SERIAL_HELP
 #define FEATURE_HELL
 #define FEATURE_PS2_KEYBOARD        // Use a PS2 keyboard to send code - Change keyboard layout (non-US) in K3NG_PS2Keyboard.h.  Additional options below.
diff --git a/k3ng_keyer/keyer_features_and_options_tinykeyer.h b/k3ng_keyer/keyer_features_and_options_tinykeyer.h
old mode 100755
new mode 100644
index bbeb548..eb5807d
--- a/k3ng_keyer/keyer_features_and_options_tinykeyer.h
+++ b/k3ng_keyer/keyer_features_and_options_tinykeyer.h
@@ -12,6 +12,7 @@
 //#define FEATURE_BEACON                // Go into beacon mode if paddle_left pin is LOW at boot up
 //#define FEATURE_BEACON_SETTING        // Go into beacon mode at boot up if EEPROM setting is enabled (\_ CLI Command)
 //#define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h). 
+//#define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 //#define FEATURE_DEAD_OP_WATCHDOG
 #define FEATURE_AUTOSPACE
 //#define FEATURE_FARNSWORTH
diff --git a/k3ng_keyer/keyer_features_and_options_yaacwk.h b/k3ng_keyer/keyer_features_and_options_yaacwk.h
index 927d2be..299b636 100644
--- a/k3ng_keyer/keyer_features_and_options_yaacwk.h
+++ b/k3ng_keyer/keyer_features_and_options_yaacwk.h
@@ -15,6 +15,7 @@
 //#define FEATURE_TRAINING_COMMAND_LINE_INTERFACE
 #define FEATURE_POTENTIOMETER         // do not enable unless you have a potentiometer connected, otherwise noise will falsely trigger wpm changes
 //#define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h).
+//#define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 //#define FEATURE_SERIAL_HELP
 //#define FEATURE_HELL
 #define FEATURE_PS2_KEYBOARD        // Use a PS2 keyboard to send code - Change keyboard layout (non-US) in K3NG_PS2Keyboard.h.  Additional options below.
@@ -117,4 +118,4 @@
 // #define OPTION_DISPLAY_MEMORY_CONTENTS_COMMAND_MODE
 
 //Added in version 2020.07.04.01
-//#define OPTION_WINKEY_PROSIGN_COMPATIBILITY  // Additional character mappings to support K1EL Winkey emulation prosigns
\ No newline at end of file
+//#define OPTION_WINKEY_PROSIGN_COMPATIBILITY  // Additional character mappings to support K1EL Winkey emulation prosigns
diff --git a/k3ng_keyer/keyer_features_and_options_yccc_so2r_mini.h b/k3ng_keyer/keyer_features_and_options_yccc_so2r_mini.h
index 8b29d9d..940ea19 100644
--- a/k3ng_keyer/keyer_features_and_options_yccc_so2r_mini.h
+++ b/k3ng_keyer/keyer_features_and_options_yccc_so2r_mini.h
@@ -18,6 +18,7 @@
 // #define FEATURE_TRAINING_COMMAND_LINE_INTERFACE
 // #define FEATURE_POTENTIOMETER         // do not enable unless you have a potentiometer connected, otherwise noise will falsely trigger wpm changes
 // #define FEATURE_SIDETONE_SWITCH   // adds switch control for the sidetone output. requires an external toggle switch (assigned to an arduino pin - see keyer_pin_settings.h). 
+// #define FEATURE_SIDETONE_NEWTONE      // Use the NewTone library, ~1k smaller code size than the standard tone library. Uses timer1 (pins 9 or 10)  https://bitbucket.org/teckel12/arduino-new-tone/wiki/Home
 // #define FEATURE_SERIAL_HELP
 // #define FEATURE_HELL
 // #define FEATURE_PS2_KEYBOARD        // Use a PS2 keyboard to send code - Change keyboard layout (non-US) in K3NG_PS2Keyboard.h.  Additional options below.
diff --git a/libraries/NewTone/NewTone.cpp b/libraries/NewTone/NewTone.cpp
new file mode 100644
index 0000000..31c3c8f
--- /dev/null
+++ b/libraries/NewTone/NewTone.cpp
@@ -0,0 +1,49 @@
+// ---------------------------------------------------------------------------
+// Created by Tim Eckel - teckel@leethost.com
+// Copyright 2013 License: GNU GPL v3 http://www.gnu.org/licenses/gpl-3.0.html
+//
+// See "NewTone.h" for purpose, syntax, version history, links, and more.
+// ---------------------------------------------------------------------------
+
+#include "NewTone.h"
+
+unsigned long _nt_time;       // Time note should end.
+uint8_t _pinMask = 0;         // Pin bitmask.
+volatile uint8_t *_pinOutput; // Output port register
+
+void NewTone(uint8_t pin, unsigned long frequency, unsigned long length) {
+  uint8_t prescaler = _BV(CS10);                 // Try using prescaler 1 first.
+  unsigned long top = F_CPU / frequency / 4 - 1; // Calculate the top.
+  if (top > 65535) {                             // If not in the range for prescaler 1, use prescaler 256 (61 Hz and lower @ 16 MHz).
+    prescaler = _BV(CS12);                       // Set the 256 prescaler bit.
+    top = top / 256 - 1;                         // Calculate the top using prescaler 256.
+  }
+
+  if (length > 0) _nt_time = millis() + length; else _nt_time = 0xFFFFFFFF; // Set when the note should end, or play "forever".
+
+  if (_pinMask == 0) {
+    _pinMask = digitalPinToBitMask(pin);                    // Get the port register bitmask for the pin.
+    _pinOutput = portOutputRegister(digitalPinToPort(pin)); // Get the output port register for the pin.
+    uint8_t *_pinMode = (uint8_t *) portModeRegister(digitalPinToPort(pin)); // Get the port mode register for the pin.
+    *_pinMode |= _pinMask; // Set the pin to Output mode.
+  }
+
+  ICR1    = top;                     // Set the top.
+  if (TCNT1 > top) TCNT1 = top;      // Counter over the top, put within range.
+  TCCR1B  = _BV(WGM13)  | prescaler; // Set PWM, phase and frequency corrected (ICR1) and prescaler.
+  TCCR1A  = _BV(COM1B0);
+  TIMSK1 |= _BV(OCIE1A);             // Activate the timer interrupt.
+}
+
+void noNewTone(uint8_t pin) {
+  TIMSK1 &= ~_BV(OCIE1A);   // Remove the timer interrupt.
+  TCCR1B  = _BV(CS11);      // Default clock prescaler of 8.
+  TCCR1A  = _BV(WGM10);     // Set to defaults so PWM can work like normal (PWM, phase corrected, 8bit).
+  *_pinOutput &= ~_pinMask; // Set pin to LOW.
+  _pinMask = 0; // Flag so we know note is no longer playing.
+}
+
+ISR(TIMER1_COMPA_vect) { // Timer interrupt vector.
+  if (millis() >= _nt_time) noNewTone(); // Check to see if it's time for the note to end.
+  *_pinOutput ^= _pinMask; // Toggle the pin state.
+}
\ No newline at end of file
diff --git a/libraries/NewTone/NewTone.h b/libraries/NewTone/NewTone.h
new file mode 100644
index 0000000..2bc3a61
--- /dev/null
+++ b/libraries/NewTone/NewTone.h
@@ -0,0 +1,50 @@
+// ---------------------------------------------------------------------------
+// NewTone Library - v1.0 - 01/20/2013
+//
+// AUTHOR/LICENSE:
+// Created by Tim Eckel - teckel@leethost.com
+// Copyright 2013 License: GNU GPL v3 http://www.gnu.org/licenses/gpl-3.0.html
+//
+// LINKS:
+// Project home: http://code.google.com/p/arduino-new-tone/
+// Blog: http://arduino.cc/forum/index.php/XXX
+//
+// DISCLAIMER:
+// This software is furnished "as is", without technical support, and with no 
+// warranty, express or implied, as to its usefulness for any purpose.
+//
+// PURPOSE:
+// Almost 1,300 bytes smaller code size than the Tone library. Faster execution
+// time. Exclusive use of port registers for fastest and smallest code. Higher
+// quality sound output than tone library. Plug-in replacement for Tone. Uses
+// timer 1 which may free up conflicts with the tone library.
+//
+// SYNTAX:
+//   NewTone( pin, frequency [, length ] ) - Play a note on pin at frequency in Hz.
+//     Parameters:
+//       * pin        - Pin speaker is wired to (other wire to ground, be sure to add an inline 100 ohm resistor).
+//       * frequency  - Play the specified frequency indefinitely, turn off with noNewTone().
+//       * length     - [optional] Set the length to play in milliseconds. (default: 0 [forever], range: 0 to 2^32-1)
+//   noNewTone(pin) - Stop playing note (pin is optional, will always stop playing on pin that was last used).
+//
+// HISTORY:
+// 01/20/2013 v1.0 - Initial release.
+//
+// ---------------------------------------------------------------------------
+
+#ifndef NewTone_h
+  #define NewTone_h
+
+  #if defined(ARDUINO) && ARDUINO >= 100
+    #include <Arduino.h>
+  #else
+    #include <WProgram.h>
+  #endif
+
+  #if defined(__AVR_ATmega8__) || defined(__AVR_ATmega128__)
+    #define TIMSK1 TIMSK
+  #endif
+
+  void NewTone(uint8_t pin, unsigned long frequency, unsigned long length = 0);
+  void noNewTone(uint8_t pin = 0);
+#endif
\ No newline at end of file
diff --git a/libraries/NewTone/keywords.txt b/libraries/NewTone/keywords.txt
new file mode 100644
index 0000000..7e44a58
--- /dev/null
+++ b/libraries/NewTone/keywords.txt
@@ -0,0 +1,18 @@
+###################################
+# Syntax Coloring Map For NewPing
+###################################
+
+###################################
+# Datatypes (KEYWORD1)
+###################################
+
+###################################
+# Methods and Functions (KEYWORD2)
+###################################
+
+NewTone	KEYWORD2
+noNewTone	KEYWORD2
+
+###################################
+# Constants (LITERAL1)
+###################################