diff --git a/libraries/extractor/src/main/java/androidx/media3/extractor/DtsUtil.java b/libraries/extractor/src/main/java/androidx/media3/extractor/DtsUtil.java
index 5c0dbec2184..0fcc37d90c3 100644
--- a/libraries/extractor/src/main/java/androidx/media3/extractor/DtsUtil.java
+++ b/libraries/extractor/src/main/java/androidx/media3/extractor/DtsUtil.java
@@ -37,6 +37,7 @@
 import java.lang.annotation.Target;
 import java.nio.ByteBuffer;
 import java.util.Arrays;
+import java.util.Objects;
 import java.util.concurrent.atomic.AtomicInteger;
 
 /** Utility methods for parsing DTS frames. */
@@ -875,31 +876,64 @@ public static int parseDtsUhdHeaderSize(byte[] headerPrefix) {
         + 1;
   }
 
-  /** Returns whether the sample data at the current {@link ExtractorInput} is a DTS-HD sample. */
-  public static boolean isSampleDtsHd(ExtractorInput input, int sampleSize) throws IOException {
+  /**
+   * Returns a {@link Format} with an adjusted MIME type if the sample data at the current {@link
+   * ExtractorInput} is a DTS-HD sample with static fields, or the unmodified {@code format} if it
+   * is not.
+   *
+   * @param input The {@link ExtractorInput} to read from.
+   * @param sampleSize The size of the sample data.
+   * @param format The {@link Format} to build upon.
+   * @return The updated {@link Format}.
+   * @throws IOException If an error occurs reading from the input.
+   */
+  public static Format updateFormatWithDtsHdInfo(
+      ExtractorInput input, int sampleSize, Format format) throws IOException {
     ParsableByteArray sampleData = new ParsableByteArray(sampleSize);
     if (!input.peekFully(
         sampleData.getData(), /* offset= */ 0, sampleSize, /* allowEndOfInput= */ true)) {
-      return false;
+      return format;
     }
     input.resetPeekPosition();
     int word = sampleData.peekInt();
+    // Skip the core frame if present (it doesn't have to be).
     if (DtsUtil.getFrameType(word) == DtsUtil.FRAME_TYPE_CORE) {
       if (sampleData.bytesLeft() < 10) {
-        return false;
+        return format;
       }
       byte[] header = new byte[10];
       sampleData.readBytes(header, /* offset= */ 0, /* length= */ 10);
-      sampleData.setPosition(0);
       int frameSize = DtsUtil.getDtsFrameSize(header);
-      if (frameSize <= 0 || sampleData.bytesLeft() < frameSize + 4) {
-        return false;
+      if (frameSize <= 0 || sampleData.limit() < frameSize + 4) {
+        return format;
       }
-      sampleData.skipBytes(frameSize);
-      word = sampleData.readInt();
-      return DtsUtil.getFrameType(word) == DtsUtil.FRAME_TYPE_EXTENSION_SUBSTREAM;
-    }
-    return false;
+      sampleData.setPosition(frameSize);
+      word = sampleData.peekInt();
+    }
+    if (DtsUtil.getFrameType(word) != DtsUtil.FRAME_TYPE_EXTENSION_SUBSTREAM) {
+      return format;
+    }
+    if (sampleData.bytesLeft() < 7) {
+      return format;
+    }
+    int extHeaderOffset = sampleData.getPosition();
+    byte[] headerPrefix = new byte[7];
+    sampleData.readBytes(headerPrefix, /* offset= */ 0, /* length= */ 7);
+    sampleData.setPosition(extHeaderOffset);
+    int frameSize = parseDtsHdHeaderSize(headerPrefix);
+    if (frameSize <= 0 || sampleData.bytesLeft() < frameSize) {
+      return format;
+    }
+    byte[] header = new byte[frameSize];
+    sampleData.readBytes(header, /* offset= */ 0, /* length= */ frameSize);
+    DtsHeader dtsHeader = parseDtsHdHeader(header);
+    // If the MIME type was parsed successfully, use it. If it is null (e.g. because static
+    // fields were missing), there's nothing we can do other than assume it is DTS-HD.
+    String mimeType = dtsHeader.mimeType != null ? dtsHeader.mimeType : MimeTypes.AUDIO_DTS_HD;
+    if (Objects.equals(format.sampleMimeType, mimeType)) {
+      return format;
+    }
+    return format.buildUpon().setSampleMimeType(mimeType).build();
   }
 
   /**
diff --git a/libraries/extractor/src/main/java/androidx/media3/extractor/mkv/MatroskaExtractor.java b/libraries/extractor/src/main/java/androidx/media3/extractor/mkv/MatroskaExtractor.java
index 4f4a08a1a6c..0683fca4525 100644
--- a/libraries/extractor/src/main/java/androidx/media3/extractor/mkv/MatroskaExtractor.java
+++ b/libraries/extractor/src/main/java/androidx/media3/extractor/mkv/MatroskaExtractor.java
@@ -1846,9 +1846,7 @@ private int writeSampleData(ExtractorInput input, Track track, int size, boolean
 
     if (track.waitingForDtsAnalysis) {
       checkNotNull(track.format);
-      if (DtsUtil.isSampleDtsHd(input, size)) {
-        track.format = track.format.buildUpon().setSampleMimeType(MimeTypes.AUDIO_DTS_HD).build();
-      }
+      track.format = DtsUtil.updateFormatWithDtsHdInfo(input, size, track.format);
       track.output.format(track.format);
       track.waitingForDtsAnalysis = false;
       maybeEndTracks();
@@ -2544,10 +2542,12 @@ public void initializeFormat(int trackId) throws ParserException {
           trueHdSampleRechunker = new TrueHdSampleRechunker();
           break;
         case CODEC_ID_DTS:
-        case CODEC_ID_DTS_EXPRESS:
           mimeType = MimeTypes.AUDIO_DTS; // temporary
           waitingForDtsAnalysis = true;
           break;
+        case CODEC_ID_DTS_EXPRESS:
+          mimeType = MimeTypes.AUDIO_DTS_EXPRESS;
+          break;
         case CODEC_ID_DTS_LOSSLESS:
           mimeType = MimeTypes.AUDIO_DTS_HD;
           break;
diff --git a/libraries/extractor/src/test/java/androidx/media3/extractor/mkv/MatroskaExtractorTest.java b/libraries/extractor/src/test/java/androidx/media3/extractor/mkv/MatroskaExtractorTest.java
index 756b9b6fdb2..82cd4ec168c 100644
--- a/libraries/extractor/src/test/java/androidx/media3/extractor/mkv/MatroskaExtractorTest.java
+++ b/libraries/extractor/src/test/java/androidx/media3/extractor/mkv/MatroskaExtractorTest.java
@@ -258,6 +258,14 @@ public void mkvSample_withDts() throws Exception {
         simulationConfig);
   }
 
+  @Test
+  public void mkaSample_withDtsExpress() throws Exception {
+    ExtractorAsserts.assertBehavior(
+        getExtractorFactory(subtitlesParsedDuringExtraction),
+        "media/mka/sample_with_dts_express.mka",
+        simulationConfig);
+  }
+
   @Test
   public void mkvSample_withDtsHdMa() throws Exception {
     ExtractorAsserts.assertBehavior(
diff --git a/libraries/test_data/src/test/assets/extractordumps/mka/sample_with_dts_express.mka.0.dump b/libraries/test_data/src/test/assets/extractordumps/mka/sample_with_dts_express.mka.0.dump
new file mode 100644
index 00000000000..0976403f6fe
--- /dev/null
+++ b/libraries/test_data/src/test/assets/extractordumps/mka/sample_with_dts_express.mka.0.dump
@@ -0,0 +1,63 @@
+seekMap:
+  isSeekable = true
+  duration = 938000
+  getPosition(0) = [[timeUs=0, position=469]]
+  getPosition(1) = [[timeUs=0, position=469]]
+  getPosition(469000) = [[timeUs=0, position=469]]
+  getPosition(938000) = [[timeUs=0, position=469]]
+numberOfTracks = 1
+track 1:
+  total output bytes = 45056
+  sample count = 11
+  format 0:
+    id = 1
+    containerMimeType = video/x-matroska
+    sampleMimeType = audio/vnd.dts.hd;profile=lbr
+    channelCount = 6
+    sampleRate = 48000
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 4096, hash 1F0B79C5
+  sample 1:
+    time = 85000
+    flags = 1
+    data = length 4096, hash 2EC282A1
+  sample 2:
+    time = 171000
+    flags = 1
+    data = length 4096, hash 6B7902F0
+  sample 3:
+    time = 256000
+    flags = 1
+    data = length 4096, hash 8FC4EE2C
+  sample 4:
+    time = 341000
+    flags = 1
+    data = length 4096, hash 67899547
+  sample 5:
+    time = 427000
+    flags = 1
+    data = length 4096, hash 1BE4CF1C
+  sample 6:
+    time = 512000
+    flags = 1
+    data = length 4096, hash 620F5E51
+  sample 7:
+    time = 597000
+    flags = 1
+    data = length 4096, hash 4D3E0644
+  sample 8:
+    time = 683000
+    flags = 1
+    data = length 4096, hash F69B5FED
+  sample 9:
+    time = 768000
+    flags = 1
+    data = length 4096, hash 93D31EA7
+  sample 10:
+    time = 853000
+    flags = 1
+    data = length 4096, hash 41F1D921
+tracksEnded = true
diff --git a/libraries/test_data/src/test/assets/extractordumps/mka/sample_with_dts_express.mka.1.dump b/libraries/test_data/src/test/assets/extractordumps/mka/sample_with_dts_express.mka.1.dump
new file mode 100644
index 00000000000..0976403f6fe
--- /dev/null
+++ b/libraries/test_data/src/test/assets/extractordumps/mka/sample_with_dts_express.mka.1.dump
@@ -0,0 +1,63 @@
+seekMap:
+  isSeekable = true
+  duration = 938000
+  getPosition(0) = [[timeUs=0, position=469]]
+  getPosition(1) = [[timeUs=0, position=469]]
+  getPosition(469000) = [[timeUs=0, position=469]]
+  getPosition(938000) = [[timeUs=0, position=469]]
+numberOfTracks = 1
+track 1:
+  total output bytes = 45056
+  sample count = 11
+  format 0:
+    id = 1
+    containerMimeType = video/x-matroska
+    sampleMimeType = audio/vnd.dts.hd;profile=lbr
+    channelCount = 6
+    sampleRate = 48000
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 4096, hash 1F0B79C5
+  sample 1:
+    time = 85000
+    flags = 1
+    data = length 4096, hash 2EC282A1
+  sample 2:
+    time = 171000
+    flags = 1
+    data = length 4096, hash 6B7902F0
+  sample 3:
+    time = 256000
+    flags = 1
+    data = length 4096, hash 8FC4EE2C
+  sample 4:
+    time = 341000
+    flags = 1
+    data = length 4096, hash 67899547
+  sample 5:
+    time = 427000
+    flags = 1
+    data = length 4096, hash 1BE4CF1C
+  sample 6:
+    time = 512000
+    flags = 1
+    data = length 4096, hash 620F5E51
+  sample 7:
+    time = 597000
+    flags = 1
+    data = length 4096, hash 4D3E0644
+  sample 8:
+    time = 683000
+    flags = 1
+    data = length 4096, hash F69B5FED
+  sample 9:
+    time = 768000
+    flags = 1
+    data = length 4096, hash 93D31EA7
+  sample 10:
+    time = 853000
+    flags = 1
+    data = length 4096, hash 41F1D921
+tracksEnded = true
diff --git a/libraries/test_data/src/test/assets/extractordumps/mka/sample_with_dts_express.mka.2.dump b/libraries/test_data/src/test/assets/extractordumps/mka/sample_with_dts_express.mka.2.dump
new file mode 100644
index 00000000000..0976403f6fe
--- /dev/null
+++ b/libraries/test_data/src/test/assets/extractordumps/mka/sample_with_dts_express.mka.2.dump
@@ -0,0 +1,63 @@
+seekMap:
+  isSeekable = true
+  duration = 938000
+  getPosition(0) = [[timeUs=0, position=469]]
+  getPosition(1) = [[timeUs=0, position=469]]
+  getPosition(469000) = [[timeUs=0, position=469]]
+  getPosition(938000) = [[timeUs=0, position=469]]
+numberOfTracks = 1
+track 1:
+  total output bytes = 45056
+  sample count = 11
+  format 0:
+    id = 1
+    containerMimeType = video/x-matroska
+    sampleMimeType = audio/vnd.dts.hd;profile=lbr
+    channelCount = 6
+    sampleRate = 48000
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 4096, hash 1F0B79C5
+  sample 1:
+    time = 85000
+    flags = 1
+    data = length 4096, hash 2EC282A1
+  sample 2:
+    time = 171000
+    flags = 1
+    data = length 4096, hash 6B7902F0
+  sample 3:
+    time = 256000
+    flags = 1
+    data = length 4096, hash 8FC4EE2C
+  sample 4:
+    time = 341000
+    flags = 1
+    data = length 4096, hash 67899547
+  sample 5:
+    time = 427000
+    flags = 1
+    data = length 4096, hash 1BE4CF1C
+  sample 6:
+    time = 512000
+    flags = 1
+    data = length 4096, hash 620F5E51
+  sample 7:
+    time = 597000
+    flags = 1
+    data = length 4096, hash 4D3E0644
+  sample 8:
+    time = 683000
+    flags = 1
+    data = length 4096, hash F69B5FED
+  sample 9:
+    time = 768000
+    flags = 1
+    data = length 4096, hash 93D31EA7
+  sample 10:
+    time = 853000
+    flags = 1
+    data = length 4096, hash 41F1D921
+tracksEnded = true
diff --git a/libraries/test_data/src/test/assets/extractordumps/mka/sample_with_dts_express.mka.3.dump b/libraries/test_data/src/test/assets/extractordumps/mka/sample_with_dts_express.mka.3.dump
new file mode 100644
index 00000000000..0976403f6fe
--- /dev/null
+++ b/libraries/test_data/src/test/assets/extractordumps/mka/sample_with_dts_express.mka.3.dump
@@ -0,0 +1,63 @@
+seekMap:
+  isSeekable = true
+  duration = 938000
+  getPosition(0) = [[timeUs=0, position=469]]
+  getPosition(1) = [[timeUs=0, position=469]]
+  getPosition(469000) = [[timeUs=0, position=469]]
+  getPosition(938000) = [[timeUs=0, position=469]]
+numberOfTracks = 1
+track 1:
+  total output bytes = 45056
+  sample count = 11
+  format 0:
+    id = 1
+    containerMimeType = video/x-matroska
+    sampleMimeType = audio/vnd.dts.hd;profile=lbr
+    channelCount = 6
+    sampleRate = 48000
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 4096, hash 1F0B79C5
+  sample 1:
+    time = 85000
+    flags = 1
+    data = length 4096, hash 2EC282A1
+  sample 2:
+    time = 171000
+    flags = 1
+    data = length 4096, hash 6B7902F0
+  sample 3:
+    time = 256000
+    flags = 1
+    data = length 4096, hash 8FC4EE2C
+  sample 4:
+    time = 341000
+    flags = 1
+    data = length 4096, hash 67899547
+  sample 5:
+    time = 427000
+    flags = 1
+    data = length 4096, hash 1BE4CF1C
+  sample 6:
+    time = 512000
+    flags = 1
+    data = length 4096, hash 620F5E51
+  sample 7:
+    time = 597000
+    flags = 1
+    data = length 4096, hash 4D3E0644
+  sample 8:
+    time = 683000
+    flags = 1
+    data = length 4096, hash F69B5FED
+  sample 9:
+    time = 768000
+    flags = 1
+    data = length 4096, hash 93D31EA7
+  sample 10:
+    time = 853000
+    flags = 1
+    data = length 4096, hash 41F1D921
+tracksEnded = true
diff --git a/libraries/test_data/src/test/assets/extractordumps/mka/sample_with_dts_express.mka.unknown_length.dump b/libraries/test_data/src/test/assets/extractordumps/mka/sample_with_dts_express.mka.unknown_length.dump
new file mode 100644
index 00000000000..0976403f6fe
--- /dev/null
+++ b/libraries/test_data/src/test/assets/extractordumps/mka/sample_with_dts_express.mka.unknown_length.dump
@@ -0,0 +1,63 @@
+seekMap:
+  isSeekable = true
+  duration = 938000
+  getPosition(0) = [[timeUs=0, position=469]]
+  getPosition(1) = [[timeUs=0, position=469]]
+  getPosition(469000) = [[timeUs=0, position=469]]
+  getPosition(938000) = [[timeUs=0, position=469]]
+numberOfTracks = 1
+track 1:
+  total output bytes = 45056
+  sample count = 11
+  format 0:
+    id = 1
+    containerMimeType = video/x-matroska
+    sampleMimeType = audio/vnd.dts.hd;profile=lbr
+    channelCount = 6
+    sampleRate = 48000
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 4096, hash 1F0B79C5
+  sample 1:
+    time = 85000
+    flags = 1
+    data = length 4096, hash 2EC282A1
+  sample 2:
+    time = 171000
+    flags = 1
+    data = length 4096, hash 6B7902F0
+  sample 3:
+    time = 256000
+    flags = 1
+    data = length 4096, hash 8FC4EE2C
+  sample 4:
+    time = 341000
+    flags = 1
+    data = length 4096, hash 67899547
+  sample 5:
+    time = 427000
+    flags = 1
+    data = length 4096, hash 1BE4CF1C
+  sample 6:
+    time = 512000
+    flags = 1
+    data = length 4096, hash 620F5E51
+  sample 7:
+    time = 597000
+    flags = 1
+    data = length 4096, hash 4D3E0644
+  sample 8:
+    time = 683000
+    flags = 1
+    data = length 4096, hash F69B5FED
+  sample 9:
+    time = 768000
+    flags = 1
+    data = length 4096, hash 93D31EA7
+  sample 10:
+    time = 853000
+    flags = 1
+    data = length 4096, hash 41F1D921
+tracksEnded = true
diff --git a/libraries/test_data/src/test/assets/media/mka/sample_with_dts_express.mka b/libraries/test_data/src/test/assets/media/mka/sample_with_dts_express.mka
new file mode 100644
index 00000000000..59257c26af9
Binary files /dev/null and b/libraries/test_data/src/test/assets/media/mka/sample_with_dts_express.mka differ