diff --git a/include/clients/rt/ChromaClient.hpp b/include/clients/rt/ChromaClient.hpp
index 58cc720f6..f34de86a9 100644
--- a/include/clients/rt/ChromaClient.hpp
+++ b/include/clients/rt/ChromaClient.hpp
@@ -102,6 +102,7 @@ class ChromaClient : public FluidBaseClient, public AudioIn, public ControlOut
         });
 
     output[0](Slice(0,get<kNChroma>())) = mChroma; 
+    output[0](Slice(get<kNChroma>(), get<kMaxNChroma>() - get<kNChroma>())).fill(0); 
   }
 
   index latency() { return get<kFFT>().winSize(); }
diff --git a/include/clients/rt/MFCCClient.hpp b/include/clients/rt/MFCCClient.hpp
index 0bdabfaa4..0cab8c696 100644
--- a/include/clients/rt/MFCCClient.hpp
+++ b/include/clients/rt/MFCCClient.hpp
@@ -118,6 +118,7 @@ class MFCCClient : public FluidBaseClient, public AudioIn, public ControlOut
   
       output[0](Slice(0, get<kNCoefs>())) =
         mCoefficients(Slice(get<kDrop0>(), get<kNCoefs>()));
+      output[0](Slice(get<kNCoefs>(), get<kMaxNCoefs>() - get<kNCoefs>())).fill(0); 
   }
 
   index latency() { return get<kFFT>().winSize(); }
diff --git a/include/clients/rt/MelBandsClient.hpp b/include/clients/rt/MelBandsClient.hpp
index 8f36a791d..4af861c4d 100644
--- a/include/clients/rt/MelBandsClient.hpp
+++ b/include/clients/rt/MelBandsClient.hpp
@@ -107,6 +107,7 @@ class MelBandsClient : public FluidBaseClient, public AudioIn, public ControlOut
     // for (index i = 0; i < get<kNBands>(); ++i)
     //   output[asUnsigned(i)](0) = static_cast<T>(mBands(i));
     output[0](Slice(0,get<kNBands>())) = mBands; 
+    output[0](Slice(get<kNBands>(), get<kMaxNBands>() - get<kNBands>())).fill(0); 
   }
 
   index latency() { return get<kFFT>().winSize(); }