diff --git a/content/media/webaudio/MediaBufferDecoder.cpp b/content/media/webaudio/MediaBufferDecoder.cpp
index f20c7426ec0b..d3a5af5f7f18 100644
--- a/content/media/webaudio/MediaBufferDecoder.cpp
+++ b/content/media/webaudio/MediaBufferDecoder.cpp
@@ -538,11 +538,11 @@ MediaDecodeTask::CopyBuffer()
         uint32_t outSamples = expectedOutSamples;
 
 #ifdef MOZ_SAMPLE_TYPE_S16
-        speex_resampler_process_int(resampler, i, bufferData, &inSamples,
+        speex_resampler_process_int(resampler, i, &bufferData[i * audioData->mFrames], &inSamples,
                                     &resampledBuffer[i * expectedOutSamples],
                                     &outSamples);
 #else
-        speex_resampler_process_float(resampler, i, bufferData, &inSamples,
+        speex_resampler_process_float(resampler, i, &bufferData[i * audioData->mFrames], &inSamples,
                                       &resampledBuffer[i * expectedOutSamples],
                                       &outSamples);
 #endif
diff --git a/content/media/webaudio/test/Makefile.in b/content/media/webaudio/test/Makefile.in
index 5bc37735a44e..bbd8c39b81d9 100644
--- a/content/media/webaudio/test/Makefile.in
+++ b/content/media/webaudio/test/Makefile.in
@@ -29,6 +29,10 @@ MOCHITEST_FILES := \
   test_singleSourceDest.html \
   ting.ogg \
   ting-expected.wav \
+  ting-dualchannel44.1.ogg \
+  ting-dualchannel44.1-expected.wav \
+  ting-dualchannel48.ogg \
+  ting-dualchannel48-expected.wav \
   small-shot.ogg \
   small-shot-expected.wav \
   invalid.txt \
diff --git a/content/media/webaudio/test/test_decodeAudioData.html b/content/media/webaudio/test/test_decodeAudioData.html
index e44284ba4ca2..de30365339b4 100644
--- a/content/media/webaudio/test/test_decodeAudioData.html
+++ b/content/media/webaudio/test/test_decodeAudioData.html
@@ -123,6 +123,28 @@ var tests = [
     fuzzTolerance: 12,
     fuzzToleranceMobile: 15826
   },
+  // An ogg file with two different channels, 44.1khz
+  {
+    url: "ting-dualchannel44.1.ogg",
+    valid: true,
+    expected: "ting-dualchannel44.1-expected.wav",
+    numberOfChannels: 2,
+    duration: 0.6936,
+    length: 33297,
+    fuzzTolerance: 16,
+    fuzzToleranceMobile: 16713
+  },
+  // An ogg file with two different channels, 48khz
+  {
+    url: "ting-dualchannel48.ogg",
+    valid: true,
+    expected: "ting-dualchannel48-expected.wav",
+    numberOfChannels: 2,
+    duration: 0.6373,
+    length: 30592,
+    fuzzTolerance: 9,
+    fuzzToleranceMobile: 2703
+  },
   // An ogg file which needs to be resampled
   {
     url: "small-shot.ogg",
@@ -148,8 +170,8 @@ var tests = [
     numberOfChannels: 2,
     duration: 1.0811,
     length: 51896,
-    fuzzTolerance: 132,
-    fuzzToleranceMobile: 56580
+    fuzzTolerance: 91427,
+    fuzzToleranceMobile: 119684
   },
   // Make sure decoding a wave file results in the same buffer
   {
diff --git a/content/media/webaudio/test/ting-dualchannel44.1-expected.wav b/content/media/webaudio/test/ting-dualchannel44.1-expected.wav
new file mode 100644
index 000000000000..e08f8e8b4c43
Binary files /dev/null and b/content/media/webaudio/test/ting-dualchannel44.1-expected.wav differ
diff --git a/content/media/webaudio/test/ting-dualchannel44.1.ogg b/content/media/webaudio/test/ting-dualchannel44.1.ogg
new file mode 100644
index 000000000000..882400a7fd12
Binary files /dev/null and b/content/media/webaudio/test/ting-dualchannel44.1.ogg differ
diff --git a/content/media/webaudio/test/ting-dualchannel48-expected.wav b/content/media/webaudio/test/ting-dualchannel48-expected.wav
new file mode 100644
index 000000000000..6005f2a8896c
Binary files /dev/null and b/content/media/webaudio/test/ting-dualchannel48-expected.wav differ
diff --git a/content/media/webaudio/test/ting-dualchannel48.ogg b/content/media/webaudio/test/ting-dualchannel48.ogg
new file mode 100644
index 000000000000..a5306ba9a5eb
Binary files /dev/null and b/content/media/webaudio/test/ting-dualchannel48.ogg differ