diff --git a/codec2talkie/src/main/res/values/strings.xml b/codec2talkie/src/main/res/values/strings.xml
index 42fc84a..1d46f95 100644
--- a/codec2talkie/src/main/res/values/strings.xml
+++ b/codec2talkie/src/main/res/values/strings.xml
@@ -302,5 +302,5 @@
     <string name="ports_type_title">TNC transport type</string>
     <string name="ports_sound_modem_disable_rx_title">Disable receive</string>
     <string name="ports_sound_modem_disable_rx_summary">Run modem in transmit only mode, receive is disabled to save CPU cycles</string>
-    <string name="ports_sound_modem_rig_title">Select radio model to control</string>
+    <string name="ports_sound_modem_rig_title">Select RIG model for CAT PTT control</string>
 </resources>
\ No newline at end of file
diff --git a/libcodec2-android/src/main/cpp/Codec2JNI.cpp b/libcodec2-android/src/main/cpp/Codec2JNI.cpp
index 698a3f3..d090519 100644
--- a/libcodec2-android/src/main/cpp/Codec2JNI.cpp
+++ b/libcodec2-android/src/main/cpp/Codec2JNI.cpp
@@ -25,6 +25,7 @@ namespace Java_com_ustadmobile_codec2_Codec2 {
         int Nbits;
         int N;
         int Ts;
+        int gain;
     };
 
     static Context *getContext(jlong jp) {
@@ -74,6 +75,8 @@ namespace Java_com_ustadmobile_codec2_Codec2 {
         conFsk->demodBits = (uint8_t*)malloc(sizeof(uint8_t) * fsk->Nbits);
         conFsk->demodBuf = (int16_t*)malloc(sizeof(short) * (fsk->N + 2 * fsk->Ts));
 
+        conFsk->gain = 10 * FDMDV_SCALE;
+
         fsk_set_freq_est_limits(fsk, 500, sampleFrequency / 4);
         fsk_set_freq_est_alg(fsk, 0);
 
@@ -168,7 +171,7 @@ namespace Java_com_ustadmobile_codec2_Codec2 {
         fsk_mod(conFsk->fsk, conFsk->modBuf, conFsk->modBits, inputBitsSize);
         jshort *jOutBuf = env->GetShortArrayElements(outputSamples, nullptr);
         for (int i = 0; i < conFsk->N; i++) {
-            jOutBuf[i] = (int16_t)(conFsk->modBuf[i] * FDMDV_SCALE);
+            jOutBuf[i] = (int16_t)(conFsk->modBuf[i] * conFsk->gain);
         }
         env->ReleaseShortArrayElements(outputSamples, jOutBuf, 0);
         return 0;
@@ -186,7 +189,7 @@ namespace Java_com_ustadmobile_codec2_Codec2 {
         ContextFsk *conFsk = getContextFsk(n);
         env->GetShortArrayRegion(inputSamples, 0, conFsk->N, reinterpret_cast<jshort*>(conFsk->demodBuf));
         for(int i = 0; i < fsk_nin(conFsk->fsk); i++){
-            conFsk->demodCBuf[i].real = ((float)conFsk->demodBuf[i]) / FDMDV_SCALE;
+            conFsk->demodCBuf[i].real = ((float)conFsk->demodBuf[i]) / conFsk->gain;
             conFsk->demodCBuf[i].imag = 0.0;
         }
         fsk_demod(conFsk->fsk, conFsk->demodBits, conFsk->demodCBuf);