diff --git a/google-api-grpc/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/SpeakerDiarizationConfig.java b/google-api-grpc/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/SpeakerDiarizationConfig.java
index deba8f7d2ce5..9244a8d03abb 100644
--- a/google-api-grpc/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/SpeakerDiarizationConfig.java
+++ b/google-api-grpc/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/SpeakerDiarizationConfig.java
@@ -3,7 +3,15 @@
 
 package com.google.cloud.speech.v1p1beta1;
 
-/** Protobuf type {@code google.cloud.speech.v1p1beta1.SpeakerDiarizationConfig} */
+/**
+ *
+ *
+ * <pre>
+ * *Optional* Config to enable speaker diarization.
+ * </pre>
+ *
+ * Protobuf type {@code google.cloud.speech.v1p1beta1.SpeakerDiarizationConfig}
+ */
 public final class SpeakerDiarizationConfig extends com.google.protobuf.GeneratedMessageV3
     implements
     // @@protoc_insertion_point(message_implements:google.cloud.speech.v1p1beta1.SpeakerDiarizationConfig)
@@ -320,7 +328,15 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.Build
     Builder builder = new Builder(parent);
     return builder;
   }
-  /** Protobuf type {@code google.cloud.speech.v1p1beta1.SpeakerDiarizationConfig} */
+  /**
+   *
+   *
+   * <pre>
+   * *Optional* Config to enable speaker diarization.
+   * </pre>
+   *
+   * Protobuf type {@code google.cloud.speech.v1p1beta1.SpeakerDiarizationConfig}
+   */
   public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
       implements
       // @@protoc_insertion_point(builder_implements:google.cloud.speech.v1p1beta1.SpeakerDiarizationConfig)
diff --git a/google-api-grpc/proto-google-cloud-speech-v1p1beta1/src/main/proto/google/cloud/speech/v1p1beta1/cloud_speech.proto b/google-api-grpc/proto-google-cloud-speech-v1p1beta1/src/main/proto/google/cloud/speech/v1p1beta1/cloud_speech.proto
index 53ea05957a25..4ca4479a8ca8 100644
--- a/google-api-grpc/proto-google-cloud-speech-v1p1beta1/src/main/proto/google/cloud/speech/v1p1beta1/cloud_speech.proto
+++ b/google-api-grpc/proto-google-cloud-speech-v1p1beta1/src/main/proto/google/cloud/speech/v1p1beta1/cloud_speech.proto
@@ -373,6 +373,7 @@ message RecognitionConfig {
   bool use_enhanced = 14;
 }
 
+// *Optional* Config to enable speaker diarization.
 message SpeakerDiarizationConfig {
   // *Optional* If 'true', enables speaker detection for each recognized word in
   // the top alternative of the recognition result using a speaker_tag provided
diff --git a/google-cloud-clients/google-cloud-speech/synth.metadata b/google-cloud-clients/google-cloud-speech/synth.metadata
index f0e91fd82320..0d2e37228665 100644
--- a/google-cloud-clients/google-cloud-speech/synth.metadata
+++ b/google-cloud-clients/google-cloud-speech/synth.metadata
@@ -1,5 +1,5 @@
 {
-  "updateTime": "2019-07-25T07:57:41.134771Z",
+  "updateTime": "2019-07-26T07:56:19.980217Z",
   "sources": [
     {
       "generator": {
@@ -12,8 +12,8 @@
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "4b12afe72950f36bef6f196a05f4430e4421a873",
-        "internalRef": "259790363"
+        "sha": "0906a9e74f4db789aee7fc5016ab828d3dd24f03",
+        "internalRef": "260061471"
       }
     }
   ],