diff --git a/Makefile b/Makefile
index 464d859..1f11a4a 100644
--- a/Makefile
+++ b/Makefile
@@ -13,7 +13,7 @@ ENABLE_NOAA                   := 0
 ENABLE_VOICE                  := 0
 ENABLE_VOX                    := 0
 ENABLE_ALARM                  := 0
-ENABLE_TX1750                 := 1
+ENABLE_TX1750                 := 0
 ENABLE_BIG_FREQ               := 0
 ENABLE_SMALL_BOLD             := 1
 ENABLE_KEEP_MEM_NAME          := 1
@@ -23,13 +23,13 @@ ENABLE_F_CAL_MENU             := 0
 ENABLE_CTCSS_TAIL_PHASE_SHIFT := 1
 ENABLE_MAIN_KEY_HOLD          := 1
 ENABLE_BOOT_BEEPS             := 0
-ENABLE_COMPANDER              := 0
+ENABLE_COMPANDER              := 1
 ENABLE_SHOW_CHARGE_LEVEL      := 1
 ENABLE_REVERSE_BAT_SYMBOL     := 1
 ENABLE_CODE_SCAN_TIMEOUT      := 0
 ENABLE_AM_FIX                 := 1
 ENABLE_AM_FIX_SHOW_DATA       := 1
-ENABLE_SQUELCH_MORE_SENSITIVE := 0
+ENABLE_SQUELCH_MORE_SENSITIVE := 1
 ENABLE_FASTER_CHANNEL_SCAN    := 0
 ENABLE_RSSI_BAR               := 1
 ENABLE_AUDIO_BAR              := 1
@@ -280,6 +280,9 @@ endif
 
 LDFLAGS = -mcpu=cortex-m0 -nostartfiles -Wl,-T,firmware.ld
 
+# Use newlib-nano instead of newlib
+LDFLAGS += --specs=nano.specs
+
 ifeq ($(DEBUG),1)
 	ASFLAGS += -g
 	CFLAGS += -g
diff --git a/README.md b/README.md
index a88a2d5..637fe80 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ ENABLE_F_CAL_MENU             := 0       enable/disable the radios hidden freque
 ENABLE_CTCSS_TAIL_PHASE_SHIFT := 1       standard CTCSS tail phase shift rather than QS's own 55Hz tone method
 ENABLE_MAIN_KEY_HOLD          := 1       initial F-key press not needed, instead just hold down keys 0-9 to access the secondary butt functions
 ENABLE_BOOT_BEEPS             := 0       gives user audio feedback on volume knob position at boot-up
-ENABLE_COMPANDER              := 0       this is broken, don't bother with it for now .. compander option (per channel)
+ENABLE_COMPANDER              := 0       compander option (per channel)
 ENABLE_SHOW_CHARGE_LEVEL      := 0       show the charge level when the radio is on charge
 ENABLE_REVERSE_BAT_SYMBOL     := 1       mirror the battery symbol on the status bar (+ pole on the right)
 ENABLE_CODE_SCAN_TIMEOUT      := 0       enable/disable 32-sec CTCSS/DCS scan timeout (press exit butt instead of time-out to end scan)
diff --git a/driver/bk4819.c b/driver/bk4819.c
index 7ddd839..45efa03 100644
--- a/driver/bk4819.c
+++ b/driver/bk4819.c
@@ -835,7 +835,7 @@ void BK4819_SetCompander(const unsigned int mode)
 	
 	if (mode == 0)
 	{	// disable
-		BK4819_WriteRegister(BK4819_REG_31, r31 & ~(1u < 3));
+		BK4819_WriteRegister(BK4819_REG_31, r31 & ~(1u << 3));
 		return;
 	}
 
@@ -856,9 +856,9 @@ void BK4819_SetCompander(const unsigned int mode)
 	const uint16_t compress_noise_dB = 64;
 //	AB40  10 1010110 1000000
 	BK4819_WriteRegister(BK4819_REG_29, // (BK4819_ReadRegister(BK4819_REG_29) & ~(3u < 14)) | (compress_ratio < 14));
-		  (compress_ratio    < 14)
-		| (compress_0dB      <  7)
-		| (compress_noise_dB <  0));
+		  (compress_ratio    << 14)
+		| (compress_0dB      <<  7)
+		| (compress_noise_dB <<  0));
  
 	// set the expander ratio
 	//
@@ -877,12 +877,12 @@ void BK4819_SetCompander(const unsigned int mode)
 	const uint16_t expand_noise_dB = 56;
 //	6B38  01 1010110 0111000
 	BK4819_WriteRegister(BK4819_REG_28, // (BK4819_ReadRegister(BK4819_REG_28) & ~(3u < 14)) | (expand_ratio < 14));
-		  (expand_ratio    < 14)
-		| (expand_0dB      <  7)
-		| (expand_noise_dB <  0));
+		  (expand_ratio    << 14)
+		| (expand_0dB      <<  7)
+		| (expand_noise_dB <<  0));
 
 	// enable
-	BK4819_WriteRegister(BK4819_REG_31, r31 | (1u < 3));
+	BK4819_WriteRegister(BK4819_REG_31, r31 | (1u << 3));
 }
 
 void BK4819_DisableVox(void)
diff --git a/driver/bk4819.h b/driver/bk4819.h
index e792de0..352bbf5 100644
--- a/driver/bk4819.h
+++ b/driver/bk4819.h
@@ -24,22 +24,22 @@
 
 enum BK4819_AF_Type_t
 {
-	BK4819_AF_MUTE     =  0u,  //
-	BK4819_AF_FM       =  1u,  // FM
-	BK4819_AF_ALAM     =  2u,  //
-	BK4819_AF_BEEP     =  3u,  //
-	BK4819_AF_UNKNOWN1 =  4u,  // SSB I think
-	BK4819_AF_UNKNOWN2 =  5u,  // SSB again
-	BK4819_AF_CTCO     =  6u,  // strange LF audio .. maybe the CTCSS LF line ?
-	BK4819_AF_AM       =  7u,  // AM
-	BK4819_AF_FSKO     =  8u,  // nothing
-	BK4819_AF_UNKNOWN3 =  9u,  // distorted
-	BK4819_AF_UNKNOWN4 = 10u,  // nothing at all
-	BK4819_AF_UNKNOWN5 = 11u,  // distorted
-	BK4819_AF_UNKNOWN6 = 12u,  // distorted
-	BK4819_AF_UNKNOWN7 = 13u,  // interesting
-	BK4819_AF_UNKNOWN8 = 14u,  // interesting 
-	BK4819_AF_UNKNOWN9 = 15u   // not a lot
+	BK4819_AF_MUTE      =  0u,  //
+	BK4819_AF_FM        =  1u,  // FM
+	BK4819_AF_ALAM      =  2u,  //
+	BK4819_AF_BEEP      =  3u,  //
+	BK4819_AF_BASEBAND1 =  4u,  // SSB
+	BK4819_AF_BASEBAND2 =  5u,  // SSB
+	BK4819_AF_CTCO      =  6u,  // strange LF audio .. maybe the CTCSS LF line ?
+	BK4819_AF_AM        =  7u,  // AM
+	BK4819_AF_FSKO      =  8u,  // nothing
+	BK4819_AF_UNKNOWN3  =  9u,  // distorted
+	BK4819_AF_UNKNOWN4  = 10u,  // nothing at all
+	BK4819_AF_UNKNOWN5  = 11u,  // distorted
+	BK4819_AF_UNKNOWN6  = 12u,  // distorted
+	BK4819_AF_UNKNOWN7  = 13u,  // interesting
+	BK4819_AF_UNKNOWN8  = 14u,  // interesting 
+	BK4819_AF_UNKNOWN9  = 15u   // not a lot
 };
 
 typedef enum BK4819_AF_Type_t BK4819_AF_Type_t;
diff --git a/firmware.bin b/firmware.bin
index 2b13c78..51e0154 100644
Binary files a/firmware.bin and b/firmware.bin differ
diff --git a/firmware.packed.bin b/firmware.packed.bin
index 6ae441b..6d664af 100644
Binary files a/firmware.packed.bin and b/firmware.packed.bin differ