diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 4f4bb2d851..b71674728a 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -51,6 +51,10 @@
         in `DefaultAudioSink` prior to calling `AudioTrack.stop()` so that
         `AudioTrack.StreamEventCallback#onPresentationEnded` correctly
         identifies when all pending data has been played.
+    *   Fix bug in `SilenceSkippingAudioProcessor` where transitions between
+        different audio formats (for example stereo to mono) can cause the
+        processor to throw an exception
+        ([#1352](https://github.com/androidx/media/issues/1352)).
 *   Video:
 *   Text:
     *   Fix issue where subtitles starting before a seek position are skipped.
diff --git a/libraries/common/src/main/java/androidx/media3/common/audio/BaseAudioProcessor.java b/libraries/common/src/main/java/androidx/media3/common/audio/BaseAudioProcessor.java
index eaa187ce7b..be0b013dcf 100644
--- a/libraries/common/src/main/java/androidx/media3/common/audio/BaseAudioProcessor.java
+++ b/libraries/common/src/main/java/androidx/media3/common/audio/BaseAudioProcessor.java
@@ -57,6 +57,7 @@ public abstract class BaseAudioProcessor implements AudioProcessor {
     return isActive() ? pendingOutputAudioFormat : AudioFormat.NOT_SET;
   }
 
+  @CallSuper
   @Override
   public boolean isActive() {
     return pendingOutputAudioFormat != AudioFormat.NOT_SET;
diff --git a/libraries/exoplayer/src/main/java/androidx/media3/exoplayer/audio/SilenceSkippingAudioProcessor.java b/libraries/exoplayer/src/main/java/androidx/media3/exoplayer/audio/SilenceSkippingAudioProcessor.java
index bc6eb805d2..60a5f17746 100644
--- a/libraries/exoplayer/src/main/java/androidx/media3/exoplayer/audio/SilenceSkippingAudioProcessor.java
+++ b/libraries/exoplayer/src/main/java/androidx/media3/exoplayer/audio/SilenceSkippingAudioProcessor.java
@@ -146,7 +146,6 @@ public final class SilenceSkippingAudioProcessor extends BaseAudioProcessor {
    */
   private final long maxSilenceToKeepDurationUs;
 
-  private AudioFormat inputFormat;
   private int bytesPerFrame;
   private boolean enabled;
   private @State int state;
@@ -236,7 +235,6 @@ public final class SilenceSkippingAudioProcessor extends BaseAudioProcessor {
     this.maxSilenceToKeepDurationUs = maxSilenceToKeepDurationUs;
     this.minVolumeToKeepPercentageWhenMuting = minVolumeToKeepPercentageWhenMuting;
     this.silenceThresholdLevel = silenceThresholdLevel;
-    inputFormat = AudioFormat.NOT_SET;
     maybeSilenceBuffer = Util.EMPTY_BYTE_ARRAY;
     contiguousOutputBuffer = Util.EMPTY_BYTE_ARRAY;
   }
@@ -266,14 +264,15 @@ public final class SilenceSkippingAudioProcessor extends BaseAudioProcessor {
     if (inputAudioFormat.encoding != C.ENCODING_PCM_16BIT) {
       throw new UnhandledAudioFormatException(inputAudioFormat);
     }
-    this.inputFormat = inputAudioFormat;
-    bytesPerFrame = inputAudioFormat.channelCount * 2;
+    if (inputAudioFormat.sampleRate == Format.NO_VALUE) {
+      return AudioFormat.NOT_SET;
+    }
     return inputAudioFormat;
   }
 
   @Override
   public boolean isActive() {
-    return inputFormat.sampleRate != Format.NO_VALUE && enabled;
+    return super.isActive() && enabled;
   }
 
   @Override
@@ -307,6 +306,7 @@ public final class SilenceSkippingAudioProcessor extends BaseAudioProcessor {
   @Override
   public void onFlush() {
     if (isActive()) {
+      bytesPerFrame = inputAudioFormat.channelCount * 2;
       // Divide by 2 to allow the buffer to be split into two bytesPerFrame aligned parts.
       int maybeSilenceBufferSize =
           alignToBytePerFrameBoundary(durationUsToFrames(minimumSilenceDurationUs) / 2) * 2;
@@ -325,7 +325,6 @@ public final class SilenceSkippingAudioProcessor extends BaseAudioProcessor {
   @Override
   public void onReset() {
     enabled = false;
-    inputFormat = AudioFormat.NOT_SET;
     maybeSilenceBuffer = Util.EMPTY_BYTE_ARRAY;
     contiguousOutputBuffer = Util.EMPTY_BYTE_ARRAY;
   }
@@ -711,7 +710,7 @@ public final class SilenceSkippingAudioProcessor extends BaseAudioProcessor {
    * Returns the number of input frames corresponding to {@code durationUs} microseconds of audio.
    */
   private int durationUsToFrames(long durationUs) {
-    return (int) ((durationUs * inputFormat.sampleRate) / C.MICROS_PER_SECOND);
+    return (int) ((durationUs * inputAudioFormat.sampleRate) / C.MICROS_PER_SECOND);
   }
 
   /**
diff --git a/libraries/exoplayer/src/test/java/androidx/media3/exoplayer/audio/SilenceSkippingAudioProcessorTest.java b/libraries/exoplayer/src/test/java/androidx/media3/exoplayer/audio/SilenceSkippingAudioProcessorTest.java
index 6d16a5655f..ac30edc4de 100644
--- a/libraries/exoplayer/src/test/java/androidx/media3/exoplayer/audio/SilenceSkippingAudioProcessorTest.java
+++ b/libraries/exoplayer/src/test/java/androidx/media3/exoplayer/audio/SilenceSkippingAudioProcessorTest.java
@@ -177,6 +177,35 @@ public final class SilenceSkippingAudioProcessorTest {
         .isEqualTo(TEST_SIGNAL_FRAME_COUNT - totalOutputFrames);
   }
 
+  @Test
+  public void
+      skipInAlternatingTestSignal_withEarlyConfigureForNextFormat_hasCorrectOutputAndSkippedFrameCounts()
+          throws Exception {
+    // Given a signal that alternates between silence and noise.
+    InputBufferProvider inputBufferProvider =
+        getInputBufferProviderForAlternatingSilenceAndNoise(
+            TEST_SIGNAL_SILENCE_DURATION_MS,
+            TEST_SIGNAL_NOISE_DURATION_MS,
+            TEST_SIGNAL_FRAME_COUNT);
+    SilenceSkippingAudioProcessor silenceSkippingAudioProcessor =
+        new SilenceSkippingAudioProcessor();
+    silenceSkippingAudioProcessor.setEnabled(true);
+    silenceSkippingAudioProcessor.configure(AUDIO_FORMAT);
+    silenceSkippingAudioProcessor.flush();
+
+    // Early configure the next format without flushing yet (this format should be ignored).
+    silenceSkippingAudioProcessor.configure(
+        new AudioFormat(
+            /* sampleRate= */ 1000, /* channelCount= */ 1, /* encoding= */ C.ENCODING_PCM_16BIT));
+    long totalOutputFrames =
+        process(silenceSkippingAudioProcessor, inputBufferProvider, INPUT_BUFFER_SIZE);
+
+    // The output has 50000 frames of noise, plus 50 * 0.2 * 1000 padding (plus rounding errors).
+    assertThat(totalOutputFrames).isIn(Range.closed(60000L - 500L, 60000L + 500L));
+    assertThat(silenceSkippingAudioProcessor.getSkippedFrames())
+        .isEqualTo(TEST_SIGNAL_FRAME_COUNT - totalOutputFrames);
+  }
+
   @Test
   public void skipWithSmallerInputBufferSize_hasCorrectOutputAndSkippedFrameCounts()
       throws Exception {
@@ -291,7 +320,6 @@ public final class SilenceSkippingAudioProcessorTest {
       InputBufferProvider inputBufferProvider,
       int inputBufferSize) {
     int bytesPerFrame = AUDIO_FORMAT.bytesPerFrame;
-    processor.flush();
     long totalOutputFrames = 0;
     while (inputBufferProvider.hasRemaining()) {
       ByteBuffer inputBuffer = inputBufferProvider.getNextInputBuffer(inputBufferSize);