diff --git a/TNC/Fsk9600Demodulator.hpp b/TNC/Fsk9600Demodulator.hpp
index 80e694d..f2cab59 100644
--- a/TNC/Fsk9600Demodulator.hpp
+++ b/TNC/Fsk9600Demodulator.hpp
@@ -33,7 +33,7 @@ struct Fsk9600Demodulator : IDemodulator
     static_assert(audio::ADC_BUFFER_SIZE >= ADC_BLOCK_SIZE);
 
     static constexpr uint32_t SAMPLE_RATE = 192000;
-    static constexpr uint16_t VREF = 4095;
+    static constexpr uint16_t VREF = 16383;
 
     using bpf_coeffs_type = std::array<int16_t, FILTER_TAP_NUM>;
     using bpf_bank_type = std::array<bpf_coeffs_type, 13>;
@@ -61,7 +61,7 @@ struct Fsk9600Demodulator : IDemodulator
         demod_filter.init(bpf);
         passall(kiss::settings().options & KISS_OPTION_PASSALL);
 
-        hadc1.Init.OversamplingMode = DISABLE;
+        hadc1.Init.OversamplingMode = ENABLE;
         if (HAL_ADC_Init(&hadc1) != HAL_OK)
         {
             CxxErrorHandler();
@@ -72,7 +72,7 @@ struct Fsk9600Demodulator : IDemodulator
         sConfig.Channel = AUDIO_IN;
         sConfig.Rank = ADC_REGULAR_RANK_1;
         sConfig.SingleDiff = ADC_SINGLE_ENDED;
-        sConfig.SamplingTime = ADC_SAMPLETIME_247CYCLES_5;
+        sConfig.SamplingTime = ADC_SAMPLETIME_6CYCLES_5;
         sConfig.OffsetNumber = ADC_OFFSET_NONE;
         sConfig.Offset = 0;
         if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
diff --git a/TNC/Fsk9600Modulator.cpp b/TNC/Fsk9600Modulator.cpp
index 8f4c3b9..5c7666d 100644
--- a/TNC/Fsk9600Modulator.cpp
+++ b/TNC/Fsk9600Modulator.cpp
@@ -38,7 +38,7 @@ void Fsk9600Modulator::init(const kiss::Hardware& hw)
 
     SysClock72();
 
-    // Configure 80MHz clock for 192ksps.
+    // Configure 72MHz clock for 192ksps.
     htim7.Init.Period = 374;
     if (HAL_TIM_Base_Init(&htim7) != HAL_OK)
     {
diff --git a/TNC/M17Demodulator.cpp b/TNC/M17Demodulator.cpp
index 453be39..f017779 100644
--- a/TNC/M17Demodulator.cpp
+++ b/TNC/M17Demodulator.cpp
@@ -29,11 +29,11 @@ void M17Demodulator::start()
     polarity = kiss::settings().rx_rev_polarity() ? -1 : 1;
     audio::virtual_ground = (VREF + 1) / 2;
 
-//    hadc1.Init.OversamplingMode = DISABLE;
-//    if (HAL_ADC_Init(&hadc1) != HAL_OK)
-//    {
-//        CxxErrorHandler();
-//    }
+    hadc1.Init.OversamplingMode = ENABLE;
+    if (HAL_ADC_Init(&hadc1) != HAL_OK)
+    {
+        CxxErrorHandler();
+    }
 
     ADC_ChannelConfTypeDef sConfig;