diff --git a/src/modules/audio_processing/aec/main/source/aec_core.c b/src/modules/audio_processing/aec/main/source/aec_core.c
index d533b4180..8782242d6 100644
--- a/src/modules/audio_processing/aec/main/source/aec_core.c
+++ b/src/modules/audio_processing/aec/main/source/aec_core.c
@@ -1306,7 +1306,7 @@ static void UpdateLevel(power_level_t *level, const short *in)
 
 static void UpdateMetrics(aec_t *aec)
 {
-    float dtmp, dtmp2, dtmp3;
+    float dtmp, dtmp2;
 
     const float actThresholdNoisy = 8.0f;
     const float actThresholdClean = 40.0f;
@@ -1372,7 +1372,6 @@ static void UpdateMetrics(aec_t *aec)
             suppressedEcho = aec->linoutlevel.averagelevel - safety * aec->linoutlevel.minlevel;
 
             dtmp2 = 10 * (float)log10(echo / suppressedEcho + 1e-10f);
-            dtmp3 = 10 * (float)log10(aec->nearlevel.averagelevel / suppressedEcho + 1e-10f);
 
             aec->aNlp.instant = dtmp2;
             if (dtmp > aec->aNlp.max) {
diff --git a/src/modules/audio_processing/aec/main/source/aec_rdft.c b/src/modules/audio_processing/aec/main/source/aec_rdft.c
index 255021210..92223343d 100644
--- a/src/modules/audio_processing/aec/main/source/aec_rdft.c
+++ b/src/modules/audio_processing/aec/main/source/aec_rdft.c
@@ -545,10 +545,8 @@ static void rftbsub_128_C(float *a) {
 
 void aec_rdft_forward_128(float *a) {
   const int n = 128;
-  int nw;
   float xi;
 
-  nw = ip[0];
   bitrv2_32or128(n, ip + 2, a);
   cftfsub_128(a);
   rftfsub_128(a);
@@ -559,9 +557,7 @@ void aec_rdft_forward_128(float *a) {
 
 void aec_rdft_inverse_128(float *a) {
   const int n = 128;
-  int nw;
 
-  nw = ip[0];
   a[1] = 0.5f * (a[0] - a[1]);
   a[0] -= a[1];
   rftbsub_128(a);
diff --git a/src/modules/audio_processing/aec/main/source/resampler.c b/src/modules/audio_processing/aec/main/source/resampler.c
index 77f81f24d..468fa8c61 100644
--- a/src/modules/audio_processing/aec/main/source/resampler.c
+++ b/src/modules/audio_processing/aec/main/source/resampler.c
@@ -176,7 +176,6 @@ int EstimateSkew(const int* rawSkew,
     float y = 0;
     float xy = 0;
     float xAvg = 0;
-    float yAvg = 0;
     float denom = 0;
     float skew = 0;
 
@@ -223,7 +222,6 @@ int EstimateSkew(const int* rawSkew,
     }
     assert(n > 0);
     xAvg = x / n;
-    yAvg = y / n;
     denom = x2 - xAvg*x;
 
     if (denom != 0) {
diff --git a/src/modules/audio_processing/aecm/main/source/aecm_core.c b/src/modules/audio_processing/aecm/main/source/aecm_core.c
index 55f7036d1..b7dae909a 100644
--- a/src/modules/audio_processing/aecm/main/source/aecm_core.c
+++ b/src/modules/audio_processing/aecm/main/source/aecm_core.c
@@ -212,7 +212,6 @@ void WebRtcAecm_InitEchoPathCore(AecmCore_t* aecm, const WebRtc_Word16* echo_pat
 //
 int WebRtcAecm_InitCore(AecmCore_t * const aecm, int samplingFreq)
 {
-    int retVal = 0;
     int i = 0;
     WebRtc_Word32 tmp32 = PART_LEN1 * PART_LEN1;
     WebRtc_Word16 tmp16 = PART_LEN1;
@@ -220,7 +219,7 @@ int WebRtcAecm_InitCore(AecmCore_t * const aecm, int samplingFreq)
     if (samplingFreq != 8000 && samplingFreq != 16000)
     {
         samplingFreq = 8000;
-        retVal = -1;
+        return -1;
     }
     // sanity check of sampling frequency
     aecm->mult = (WebRtc_Word16)samplingFreq / 8000;
@@ -245,7 +244,7 @@ int WebRtcAecm_InitCore(AecmCore_t * const aecm, int samplingFreq)
 
     if (WebRtcAecm_InitDelayEstimator(aecm->delay_estimator) != 0)
     {
-        retVal = -1;
+        return -1;
     }
 
     // Initialize to reasonable values
diff --git a/src/modules/audio_processing/agc/main/source/digital_agc.c b/src/modules/audio_processing/agc/main/source/digital_agc.c
index 4fd21e21a..e303a92f9 100644
--- a/src/modules/audio_processing/agc/main/source/digital_agc.c
+++ b/src/modules/audio_processing/agc/main/source/digital_agc.c
@@ -660,11 +660,9 @@ WebRtc_Word16 WebRtcAgc_ProcessVad(AgcVad_t *state, // (i) VAD state
     WebRtc_Word16 buf2[4];
     WebRtc_Word16 HPstate;
     WebRtc_Word16 zeros, dB;
-    WebRtc_Word16 *buf1_ptr;
 
     // process in 10 sub frames of 1 ms (to save on memory)
     nrg = 0;
-    buf1_ptr = &buf1[0];
     HPstate = state->HPstate;
     for (subfr = 0; subfr < 10; subfr++)
     {