diff --git a/hardware/AFSK.c b/hardware/AFSK.c
index 5ebac93..50a5214 100755
--- a/hardware/AFSK.c
+++ b/hardware/AFSK.c
@@ -364,11 +364,11 @@ void AFSK_adc_isr(Afsk *afsk, int8_t currentSample) {
         // afsk->iirY[1] = afsk->iirX[0] + afsk->iirX[1] + (afsk->iirY[0] * 0.3101172565);
     #elif FILTER_CUTOFF == 1200
         afsk->iirY[1] = afsk->iirX[0] + afsk->iirX[1] + (afsk->iirY[0] / 10);
-        // The above is a simplification of a first-order 800Hz chebyshev filter:
+        // The above is a simplification of a first-order 1200Hz chebyshev filter:
         // afsk->iirY[1] = afsk->iirX[0] + afsk->iirX[1] + (afsk->iirY[0] * 0.1025215106);
     #elif FILTER_CUTOFF == 1600
         afsk->iirY[1] = afsk->iirX[0] + afsk->iirX[1] + -1*(afsk->iirY[0] / 17);
-        // The above is a simplification of a first-order 800Hz chebyshev filter:
+        // The above is a simplification of a first-order 1600Hz chebyshev filter:
         // afsk->iirY[1] = afsk->iirX[0] + afsk->iirX[1] + (afsk->iirY[0] * -0.0630669239);
     #else
         #error Unsupported filter cutoff!
diff --git a/hardware/AFSK.h b/hardware/AFSK.h
index 6b8da2d..be69381 100755
--- a/hardware/AFSK.h
+++ b/hardware/AFSK.h
@@ -51,17 +51,12 @@ inline static uint8_t sinSample(uint16_t i) {
 
 #define SAMPLESPERBIT (SAMPLERATE / BITRATE)
 #define PHASE_INC    1                              // Nudge by an eigth of a sample each adjustment
-
-#if BITRATE == 300
-    #define FILTER_CUTOFF 600
-    #define MARK_FREQ  1600
-    #define SPACE_FREQ 1800
-    #define PHASE_BITS   10                         // How much to increment phase counter each sample
-#elif BITRATE == 960
+                       
+#if BITRATE == 960
     #define FILTER_CUTOFF 600
     #define MARK_FREQ  960
     #define SPACE_FREQ 1600
-    #define PHASE_BITS   10
+    #define PHASE_BITS   10                         // How much to increment phase counter each sample
 #elif BITRATE == 1200
     #define FILTER_CUTOFF 600
     #define MARK_FREQ  1200
@@ -72,11 +67,6 @@ inline static uint8_t sinSample(uint16_t i) {
     #define MARK_FREQ  1600
     #define SPACE_FREQ 2600
     #define PHASE_BITS   8
-#elif BITRATE == 2400
-    #define FILTER_CUTOFF 1600
-    #define MARK_FREQ  2400
-    #define SPACE_FREQ 4200
-    #define PHASE_BITS   4
 #else
     #error Unsupported bitrate!
 #endif