diff --git a/codec2talkie/src/main/java/com/radio/codec2talkie/protocol/Freedv.java b/codec2talkie/src/main/java/com/radio/codec2talkie/protocol/Freedv.java
index 2e149c9..c220c0d 100644
--- a/codec2talkie/src/main/java/com/radio/codec2talkie/protocol/Freedv.java
+++ b/codec2talkie/src/main/java/com/radio/codec2talkie/protocol/Freedv.java
@@ -39,9 +39,11 @@ public class Freedv implements Protocol {
 
         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
         int mode = SettingsWrapper.getFreeDvSoundModemModulation(sharedPreferences);
-        Log.i(TAG, "Using freedv mode " + AudioTools.getFreedvModeAsText(sharedPreferences));
+        int gain = Integer.parseInt(sharedPreferences.getString(PreferenceKeys.PORTS_SOUND_MODEM_GAIN, "10000"));
 
-        _freedv = Codec2.freedvCreate(mode);
+        Log.i(TAG, "Using freedv mode " + AudioTools.getFreedvModeAsText(sharedPreferences) + " gain " + gain);
+
+        _freedv = Codec2.freedvCreate(mode, gain);
         _modemTxBuffer = new short[Codec2.freedvGetNomModemSamples(_freedv)];
         _speechRxBuffer = new short[Codec2.freedvGetMaxSpeechSamples(_freedv)];
     }
@@ -77,12 +79,15 @@ public class Freedv implements Protocol {
         short[] buf = new short[nin];
         int bytesRead = _transport.read(buf);
         if (bytesRead == nin) {
+            //Log.i(TAG, "read " + bytesRead);
             long cntRead = Codec2.freedvRx(_freedv, _speechRxBuffer, buf);
             if (cntRead > 0) {
-                //Log.i(TAG, "receive " + cntRead);
+                Log.i(TAG, "receive " + cntRead);
                 _parentProtocolCallback.onReceivePcmAudio(null, null, -1, Arrays.copyOf(_speechRxBuffer, (int) cntRead));
                 return true;
             }
+        } else {
+            //Log.w(TAG, bytesRead + "!=" + nin);
         }
         return false;
     }
diff --git a/codec2talkie/src/main/java/com/radio/codec2talkie/transport/SoundModem.java b/codec2talkie/src/main/java/com/radio/codec2talkie/transport/SoundModem.java
index 71059ae..504a353 100644
--- a/codec2talkie/src/main/java/com/radio/codec2talkie/transport/SoundModem.java
+++ b/codec2talkie/src/main/java/com/radio/codec2talkie/transport/SoundModem.java
@@ -15,6 +15,7 @@ import androidx.preference.PreferenceManager;
 import com.radio.codec2talkie.rigctl.RigCtl;
 import com.radio.codec2talkie.rigctl.RigCtlFactory;
 import com.radio.codec2talkie.settings.PreferenceKeys;
+import com.radio.codec2talkie.tools.DebugTools;
 
 import java.io.IOException;
 import java.nio.BufferOverflowException;
@@ -129,10 +130,10 @@ public class SoundModem implements Transport, Runnable {
     public int read(short[] audioSamples) throws IOException {
         synchronized (_recordAudioBuffer) {
             if (_recordAudioBuffer.position() >= audioSamples.length) {
-                //Log.i(TAG, "read " + _recordAudioBuffer.position());
                 _recordAudioBuffer.flip();
                 _recordAudioBuffer.get(audioSamples);
                 _recordAudioBuffer.compact();
+                //Log.i(TAG, "read " + _recordAudioBuffer.position() + " " +audioSamples.length + " " +  DebugTools.shortsToHex(audioSamples));
                 return audioSamples.length;
             }
         }
diff --git a/libcodec2-android/src/main/cpp/Codec2JNI.cpp b/libcodec2-android/src/main/cpp/Codec2JNI.cpp
index d794ac3..cfaa5d5 100644
--- a/libcodec2-android/src/main/cpp/Codec2JNI.cpp
+++ b/libcodec2-android/src/main/cpp/Codec2JNI.cpp
@@ -33,6 +33,7 @@ namespace Java_com_ustadmobile_codec2_Codec2 {
         struct freedv *freeDv;
         short *speechSamples;
         short *modemSamples;
+        int gain;
     };
 
     static Context *getContext(jlong jp) {
@@ -97,10 +98,11 @@ namespace Java_com_ustadmobile_codec2_Codec2 {
         return reinterpret_cast<jlong>(conFsk);
     }
 
-    static jlong freedvCreate(JNIEnv *env, jclass clazz, int mode) {
+    static jlong freedvCreate(JNIEnv *env, jclass clazz, int mode, int gain) {
         struct ContextFreedv *conFreedv;
         conFreedv = (struct ContextFreedv *) malloc(sizeof(struct ContextFreedv));
         conFreedv->freeDv = freedv_open(mode);
+        conFreedv->gain = gain;
         conFreedv->speechSamples = static_cast<short *>(malloc(
                 freedv_get_n_max_speech_samples(conFreedv->freeDv) * sizeof(short)));
         conFreedv->modemSamples = static_cast<short *>(malloc(
@@ -270,6 +272,7 @@ namespace Java_com_ustadmobile_codec2_Codec2 {
         ContextFreedv *conFreedv = getContextFreedv(n);
         int nin = freedv_nin(conFreedv->freeDv);
         env->GetShortArrayRegion(inputModemSamples, 0, nin, conFreedv->speechSamples);
+        //int cntRead = freedv_shortrx(conFreedv->freeDv, conFreedv->modemSamples, conFreedv->speechSamples, conFreedv->gain);
         int cntRead = freedv_rx(conFreedv->freeDv, conFreedv->modemSamples, conFreedv->speechSamples);
         env->SetShortArrayRegion(outputSpeechSamples, 0, nin, conFreedv->modemSamples);
         return cntRead;
@@ -295,7 +298,7 @@ namespace Java_com_ustadmobile_codec2_Codec2 {
         {"fskSamplesPerSymbol", "(J)I",         (void *) fskSamplesPerSymbol},
         {"fskNin", "(J)I",                      (void *) fskNin},
         // freedv
-        {"freedvCreate", "(I)J",                (void *)freedvCreate},
+        {"freedvCreate", "(II)J",               (void *)freedvCreate},
         {"freedvDestroy", "(J)I",               (void *)freedvDestroy},
         {"freedvGetMaxSpeechSamples", "(J)I",   (void *)freedvGetMaxSpeechSamples},
         {"freedvGetMaxModemSamples", "(J)I",    (void *)freedvGetMaxModemSamples},
diff --git a/libcodec2-android/src/main/java/com/ustadmobile/codec2/Codec2.java b/libcodec2-android/src/main/java/com/ustadmobile/codec2/Codec2.java
index 17f9b1b..88fbffb 100644
--- a/libcodec2-android/src/main/java/com/ustadmobile/codec2/Codec2.java
+++ b/libcodec2-android/src/main/java/com/ustadmobile/codec2/Codec2.java
@@ -57,7 +57,7 @@ public class Codec2 {
     public native static long fskDemodulate(long conFsk, short[] inputSamples, byte[] outputBits);
 
     // freedv
-    public native static long freedvCreate(int mode);
+    public native static long freedvCreate(int mode, int gain);
     public native static int freedvDestroy(long conFreedv);
 
     public native static int freedvGetMaxSpeechSamples(long conFreedv);