diff --git a/services/audioflinger/Effects.cpp b/services/audioflinger/Effects.cpp
index bbea971..aedde69 100644
--- a/services/audioflinger/Effects.cpp
+++ b/services/audioflinger/Effects.cpp
@@ -279,12 +279,29 @@
                                         mConfig.inputCfg.buffer.s32,
                                         mConfig.inputCfg.buffer.frameCount/2);
         }
+        int ret;
+        if (isProcessImplemented()) {
+            // do the actual processing in the effect engine
+            ret = (*mEffectInterface)->process(mEffectInterface,
+                                                   &mConfig.inputCfg.buffer,
+                                                   &mConfig.outputCfg.buffer);
+        } else {
+            if (mConfig.inputCfg.buffer.raw != mConfig.outputCfg.buffer.raw) {
+                size_t frameCnt = mConfig.inputCfg.buffer.frameCount * FCC_2;  //always stereo here
+                int16_t *in = mConfig.inputCfg.buffer.s16;
+                int16_t *out = mConfig.outputCfg.buffer.s16;
 
-        // do the actual processing in the effect engine
-        int ret = (*mEffectInterface)->process(mEffectInterface,
-                                               &mConfig.inputCfg.buffer,
-                                               &mConfig.outputCfg.buffer);
-
+                if (mConfig.outputCfg.accessMode == EFFECT_BUFFER_ACCESS_ACCUMULATE) {
+                    for (size_t i = 0; i < frameCnt; i++) {
+                        out[i] = clamp16((int32_t)out[i] + (int32_t)in[i]);
+                    }
+                } else {
+                    memcpy(mConfig.outputCfg.buffer.raw, mConfig.inputCfg.buffer.raw,
+                           frameCnt * sizeof(int16_t));
+                }
+            }
+            ret = -ENODATA;
+        }
         // force transition to IDLE state when engine is ready
         if (mState == STOPPED && ret == -ENODATA) {
             mDisableWaitCnt = 1;
@@ -301,7 +318,7 @@
         // accumulate input onto output
         sp<EffectChain> chain = mChain.promote();
         if (chain != 0 && chain->activeTrackCnt() != 0) {
-            size_t frameCnt = mConfig.inputCfg.buffer.frameCount * 2;  //always stereo here
+            size_t frameCnt = mConfig.inputCfg.buffer.frameCount * FCC_2;  //always stereo here
             int16_t *in = mConfig.inputCfg.buffer.s16;
             int16_t *out = mConfig.outputCfg.buffer.s16;
             for (size_t i = 0; i < frameCnt; i++) {
diff --git a/services/audioflinger/Effects.h b/services/audioflinger/Effects.h
index 322c06a..da0f3c5 100644
--- a/services/audioflinger/Effects.h
+++ b/services/audioflinger/Effects.h
@@ -119,6 +119,8 @@
                         { return (mDescriptor.flags & EFFECT_FLAG_OFFLOAD_SUPPORTED) != 0; }
     bool             isImplementationSoftware() const
                         { return (mDescriptor.flags & EFFECT_FLAG_HW_ACC_MASK) == 0; }
+    bool             isProcessImplemented() const
+                        { return (mDescriptor.flags & EFFECT_FLAG_NO_PROCESS) == 0; }
     status_t         setOffloaded(bool offloaded, audio_io_handle_t io);
     bool             isOffloaded() const;
     void             addEffectToHal_l();
diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 6aedd29..a91fc26 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -1272,6 +1272,12 @@
                 desc->name, mThreadName);
         return BAD_VALUE;
     }
+
+    // always allow effects without processing load or latency
+    if ((desc->flags & EFFECT_FLAG_NO_PROCESS_MASK) == EFFECT_FLAG_NO_PROCESS) {
+        return NO_ERROR;
+    }
+
     audio_input_flags_t flags = mInput->flags;
     if (hasFastCapture() || (flags & AUDIO_INPUT_FLAG_FAST)) {
         if (flags & AUDIO_INPUT_FLAG_RAW) {
@@ -1328,6 +1334,11 @@
                     break;
                 }
             }
+
+            // always allow effects without processing load or latency
+            if ((desc->flags & EFFECT_FLAG_NO_PROCESS_MASK) == EFFECT_FLAG_NO_PROCESS) {
+                break;
+            }
             if (flags & AUDIO_OUTPUT_FLAG_RAW) {
                 ALOGW("checkEffectCompatibility_l(): effect %s on playback thread in raw mode",
                       desc->name);