diff --git a/TeensyDSP/DSP.cpp b/TeensyDSP/DSP.cpp
index 926815d..9d29f06 100644
--- a/TeensyDSP/DSP.cpp
+++ b/TeensyDSP/DSP.cpp
@@ -66,6 +66,8 @@ void UBitxDSP::begin() {
   // Rig (Line) Input (RX)
   audioCtrl.inputSelect(AUDIO_INPUT_LINEIN);
   audioCtrl.unmuteLineout();
+  audioCtrl.lineInLevel(5, 5);  // RX, TX
+  audioCtrl.lineOutLevel(29, 29); //RX, TX
 
   // Mic Input (TX)
   audioCtrl.micGain(0); // TODO: set value
@@ -84,6 +86,9 @@ void UBitxDSP::begin() {
   // USB Output (RX)
 
   // Rig (Line) Output (TX)
+
+  // Default to RX.
+  rx();
 }
 
 void UBitxDSP::end() {
diff --git a/TeensyDSP/TeensyDSP.ino b/TeensyDSP/TeensyDSP.ino
index 59edc8f..31c5f68 100644
--- a/TeensyDSP/TeensyDSP.ino
+++ b/TeensyDSP/TeensyDSP.ino
@@ -445,6 +445,10 @@ const int adcIntervalMillis = ADC_INTERVAL_MS;
 // MAIN LOOP
 //======================================================================
 
+#ifdef DEBUG
+int frameCounter = 0;
+#endif
+
 void loop()
 {
   //char isProcess = 0; // 0: init, 1: complete ADC sampling, 2: complete FFT
@@ -469,6 +473,37 @@ void loop()
     // TODO: debug output (frame skipping / utilization).
     sinceFrameMillis = 0;
 
+#ifdef DEBUG
+    // For debugging, output some debug info every 1.0" (40 frames @ 40 Hz).
+    frameCounter++;
+    if (frameCounter % 40 == 0) {
+      Serial.print("DBG: Frame: ");
+      Serial.print(frameCounter);
+      if (isTX) {
+        Serial.print(", Loop State: TX");
+      } else {
+        Serial.print(", Loop State: RX");
+      }
+      if (TR.transmitting()) {
+        Serial.println(", TR State: TX");
+      } else {
+        Serial.println(", TR State: RX");
+      }
+      Serial.print("DBG: S-Meter Raw: ");
+      Serial.print(Sensors.sMeterUnscaled());
+      Serial.print(", S-Meter Scaled: ");
+      Serial.println(scaledSMeter);
+      Serial.print("DBG: VSWR Calc: ");
+      Serial.print(calcVSWR, 2);      
+      Serial.print(", VSWR Scaled: ");
+      Serial.print(scaledVSWR);
+      Serial.print(", FWD PWR: ");
+      Serial.print(fwdPower, 2);
+      Serial.print(", REV PWR: ");
+      Serial.println(revPower, 2);
+    }
+#endif
+
     TR.update();
 
     if (isTX) {