diff --git a/libraries/transformer/src/main/java/androidx/media3/transformer/SpeedChangingAudioProcessor.java b/libraries/common/src/main/java/androidx/media3/common/audio/SpeedChangingAudioProcessor.java
similarity index 93%
rename from libraries/transformer/src/main/java/androidx/media3/transformer/SpeedChangingAudioProcessor.java
rename to libraries/common/src/main/java/androidx/media3/common/audio/SpeedChangingAudioProcessor.java
index 466a7717b4..13e8d1011a 100644
--- a/libraries/transformer/src/main/java/androidx/media3/transformer/SpeedChangingAudioProcessor.java
+++ b/libraries/common/src/main/java/androidx/media3/common/audio/SpeedChangingAudioProcessor.java
@@ -14,14 +14,12 @@
  * limitations under the License.
  */
 
-package androidx.media3.transformer;
+package androidx.media3.common.audio;
 
 import static java.lang.Math.min;
 
 import androidx.media3.common.C;
-import androidx.media3.common.audio.AudioProcessor;
-import androidx.media3.common.audio.BaseAudioProcessor;
-import androidx.media3.common.audio.SonicAudioProcessor;
+import androidx.media3.common.util.UnstableApi;
 import androidx.media3.common.util.Util;
 import com.google.errorprone.annotations.CanIgnoreReturnValue;
 import java.nio.ByteBuffer;
@@ -29,9 +27,10 @@ import java.nio.ByteBuffer;
 /**
  * An {@link AudioProcessor} that changes the speed of audio samples depending on their timestamp.
  */
-// TODO(b/198772621): Consider making the processor inactive and skipping it in the processor chain
+// TODO(b/288221200): Consider making the processor inactive and skipping it in the processor chain
 //  when speed is 1.
-/* package */ final class SpeedChangingAudioProcessor extends BaseAudioProcessor {
+@UnstableApi
+public final class SpeedChangingAudioProcessor extends BaseAudioProcessor {
 
   /** The speed provider that provides the speed for each timestamp. */
   private final SpeedProvider speedProvider;
diff --git a/libraries/transformer/src/main/java/androidx/media3/transformer/SpeedProvider.java b/libraries/common/src/main/java/androidx/media3/common/audio/SpeedProvider.java
similarity index 83%
rename from libraries/transformer/src/main/java/androidx/media3/transformer/SpeedProvider.java
rename to libraries/common/src/main/java/androidx/media3/common/audio/SpeedProvider.java
index dc85d90023..ba55abf513 100644
--- a/libraries/transformer/src/main/java/androidx/media3/transformer/SpeedProvider.java
+++ b/libraries/common/src/main/java/androidx/media3/common/audio/SpeedProvider.java
@@ -13,18 +13,20 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package androidx.media3.transformer;
+package androidx.media3.common.audio;
 
 import androidx.media3.common.C;
+import androidx.media3.common.util.UnstableApi;
 
 /** A custom interface that determines the speed for media at specific timestamps. */
-/* package */ interface SpeedProvider {
+@UnstableApi
+public interface SpeedProvider {
 
   /**
-   * Provides the speed that the media should be played at, based on the timeUs.
+   * Returns the media speed at the provided timestamp.
    *
    * @param timeUs The timestamp of the media.
-   * @return The speed that the media should be played at, based on the timeUs.
+   * @return The speed that the media should be played at.
    */
   float getSpeed(long timeUs);
 
diff --git a/libraries/transformer/src/test/java/androidx/media3/transformer/SpeedChangingAudioProcessorTest.java b/libraries/common/src/test/java/androidx/media3/common/audio/SpeedChangingAudioProcessorTest.java
similarity index 99%
rename from libraries/transformer/src/test/java/androidx/media3/transformer/SpeedChangingAudioProcessorTest.java
rename to libraries/common/src/test/java/androidx/media3/common/audio/SpeedChangingAudioProcessorTest.java
index f10531b0f8..6e6343d652 100644
--- a/libraries/transformer/src/test/java/androidx/media3/transformer/SpeedChangingAudioProcessorTest.java
+++ b/libraries/common/src/test/java/androidx/media3/common/audio/SpeedChangingAudioProcessorTest.java
@@ -13,14 +13,13 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package androidx.media3.transformer;
+package androidx.media3.common.audio;
 
 import static androidx.media3.common.audio.AudioProcessor.EMPTY_BUFFER;
 import static androidx.media3.common.util.Assertions.checkArgument;
 import static com.google.common.truth.Truth.assertThat;
 
 import androidx.media3.common.C;
-import androidx.media3.common.audio.AudioProcessor;
 import androidx.media3.common.util.Util;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import java.nio.ByteBuffer;
diff --git a/libraries/transformer/src/main/java/androidx/media3/transformer/AudioSamplePipeline.java b/libraries/transformer/src/main/java/androidx/media3/transformer/AudioSamplePipeline.java
index 095cff9cf1..05d2ff14ff 100644
--- a/libraries/transformer/src/main/java/androidx/media3/transformer/AudioSamplePipeline.java
+++ b/libraries/transformer/src/main/java/androidx/media3/transformer/AudioSamplePipeline.java
@@ -30,6 +30,7 @@ import androidx.media3.common.MimeTypes;
 import androidx.media3.common.audio.AudioProcessingPipeline;
 import androidx.media3.common.audio.AudioProcessor;
 import androidx.media3.common.audio.AudioProcessor.AudioFormat;
+import androidx.media3.common.audio.SpeedChangingAudioProcessor;
 import androidx.media3.common.util.Util;
 import androidx.media3.decoder.DecoderInputBuffer;
 import com.google.common.collect.ImmutableList;
diff --git a/libraries/transformer/src/main/java/androidx/media3/transformer/SegmentSpeedProvider.java b/libraries/transformer/src/main/java/androidx/media3/transformer/SegmentSpeedProvider.java
index 9ab8b7a01a..a6c1dae1f5 100644
--- a/libraries/transformer/src/main/java/androidx/media3/transformer/SegmentSpeedProvider.java
+++ b/libraries/transformer/src/main/java/androidx/media3/transformer/SegmentSpeedProvider.java
@@ -21,6 +21,7 @@ import static androidx.media3.extractor.metadata.mp4.SlowMotionData.Segment.BY_S
 import androidx.annotation.Nullable;
 import androidx.media3.common.C;
 import androidx.media3.common.Metadata;
+import androidx.media3.common.audio.SpeedProvider;
 import androidx.media3.common.util.Util;
 import androidx.media3.extractor.metadata.mp4.SlowMotionData;
 import androidx.media3.extractor.metadata.mp4.SlowMotionData.Segment;