diff --git a/hardware/AFSK.c b/hardware/AFSK.c
index 747fc0e..f24f049 100755
--- a/hardware/AFSK.c
+++ b/hardware/AFSK.c
@@ -399,13 +399,25 @@ void AFSK_adc_isr(Afsk *afsk, int8_t currentSample) {
 
     afsk->iirX[0] = afsk->iirX[1];
 
-    #if CONFIG_ADC_SAMPLERATE == 9600
+    #if CONFIG_ADC_SAMPLERATE == 4800
+        #if FILTER_CUTOFF == 600
+            #define IIR_GAIN 2 // Really 2.228465666
+            #define IIR_POLE 10 // Really Y[0] * 0.1025215106
+            afsk->iirX[1] = ((int8_t)fifo_pop(&afsk->delayFifo) * currentSample) / IIR_GAIN;
+            afsk->iirY[0] = afsk->iirY[1];
+            afsk->iirY[1] = afsk->iirX[0] + afsk->iirX[1] + (afsk->iirY[0] / IIR_POLE);
+
+        #else
+            #error Unsupported filter cutoff!
+        #endif
+
+    #elif CONFIG_ADC_SAMPLERATE == 9600
         #if FILTER_CUTOFF == 500
             #define IIR_GAIN 4 // Really 4.082041675
             #define IIR_POLE 2 // Really Y[0] * 0.5100490981
             afsk->iirX[1] = ((int8_t)fifo_pop(&afsk->delayFifo) * currentSample) / IIR_GAIN;
             afsk->iirY[0] = afsk->iirY[1];
-            afsk->iirY[1] = afsk->iirX[0] + afsk->iirX[1] + (afsk->iirY[0] / 2);
+            afsk->iirY[1] = afsk->iirX[0] + afsk->iirX[1] + (afsk->iirY[0] / IIR_POLE);
 
         #else
             #error Unsupported filter cutoff!
diff --git a/hardware/AFSK.h b/hardware/AFSK.h
index af93cdd..0c492e8 100755
--- a/hardware/AFSK.h
+++ b/hardware/AFSK.h
@@ -46,9 +46,12 @@ inline static uint8_t sinSample(uint16_t i) {
 #define CONFIG_AFSK_TRAILER_LEN 25UL
 #define BIT_STUFF_LEN 5
 
-#define BITRATE 1200
+#define BITRATE 300
 
-#if BITRATE == 1200
+#if BITRATE == 300
+    #define CONFIG_ADC_SAMPLERATE 4800UL
+    #define CONFIG_DAC_SAMPLERATE 19200UL
+#elif BITRATE == 1200
     #define CONFIG_ADC_SAMPLERATE 9600UL
     #define CONFIG_DAC_SAMPLERATE 19200UL
 #elif BITRATE == 2400
@@ -63,7 +66,9 @@ inline static uint8_t sinSample(uint16_t i) {
 #define DAC_TICKS_BETWEEN_SAMPLES ((((CPU_FREQ+FREQUENCY_CORRECTION)) / CONFIG_DAC_SAMPLERATE) - 1)
 
 // TODO: Maybe revert to only looking at two samples
-#if BITRATE == 1200
+#if BITRATE == 300
+    #define SIGNAL_TRANSITIONED(bits) DUAL_XOR((bits), (bits) >> 2)
+#elif BITRATE == 1200
     #if CONFIG_ADC_SAMPLERATE == 19200
         #define SIGNAL_TRANSITIONED(bits) QUAD_XOR((bits), (bits) >> 4)
     #elif CONFIG_ADC_SAMPLERATE == 9600
@@ -81,7 +86,9 @@ inline static uint8_t sinSample(uint16_t i) {
 
 // TODO: Test which target is best in real world
 // For 1200, this seems a little better
-#if BITRATE == 1200
+#if BITRATE == 300
+    #define PHASE_THRESHOLD  (PHASE_MAX / 2)
+#elif BITRATE == 1200
     #if CONFIG_ADC_SAMPLERATE == 19200
         #define PHASE_THRESHOLD  (PHASE_MAX / 2)+3*PHASE_BITS  // Target transition point of our phase window
     #elif CONFIG_ADC_SAMPLERATE == 9600
@@ -158,14 +165,11 @@ typedef struct Afsk
     // Demodulation values
     FIFOBuffer delayFifo;                   // Delayed FIFO for frequency discrimination
     #if BITRATE == 1200
-        // TODO: Clean this up
-        #if CONFIG_ADC_SAMPLERATE == 19200
-            int8_t delayBuf[ADC_SAMPLESPERBIT / 2 + 1]; // Actual data storage for said FIFO
-        #elif CONFIG_ADC_SAMPLERATE == 9600
-            int8_t delayBuf[ADC_SAMPLESPERBIT / 2 + 1]; // Actual data storage for said FIFO
-        #endif
+        int8_t delayBuf[ADC_SAMPLESPERBIT / 2 + 1]; // Actual data storage for said FIFO
     #elif BITRATE == 2400
-        int8_t delayBuf[7 + 1]; // Actual data storage for said FIFO
+        int8_t delayBuf[7 + 1];
+    #elif BITRATE == 300
+        int8_t delayBuf[ADC_SAMPLESPERBIT / 2 + 1];
     #endif
 
     FIFOBuffer rxFifo;                      // FIFO for received data
@@ -177,9 +181,7 @@ typedef struct Afsk
     #if ADC_SAMPLESPERBIT < 17
         uint16_t sampledBits;               // Bits sampled by the demodulator (at ADC speed)
     #else
-        // TODO: Enable error and set up correct size buffers
-        uint16_t sampledBits;
-        //#error Not enough space in sampledBits variable!
+        #error Not enough space in sampledBits variable!
     #endif
     int16_t currentPhase;                    // Current phase of the demodulator
     uint8_t actualBits;                     // Actual found bits at correct bitrate