diff --git a/google/cloud/texttospeech_v1/services/text_to_speech/async_client.py b/google/cloud/texttospeech_v1/services/text_to_speech/async_client.py
index 98b4a6a6..b3f3bfff 100644
--- a/google/cloud/texttospeech_v1/services/text_to_speech/async_client.py
+++ b/google/cloud/texttospeech_v1/services/text_to_speech/async_client.py
@@ -223,17 +223,7 @@ async def list_voices(
         # and friendly error handling.
         rpc = gapic_v1.method_async.wrap_method(
             self._client._transport.list_voices,
-            default_retry=retries.Retry(
-                initial=0.1,
-                maximum=60.0,
-                multiplier=1.3,
-                predicate=retries.if_exception_type(
-                    core_exceptions.DeadlineExceeded,
-                    core_exceptions.ServiceUnavailable,
-                ),
-                deadline=600.0,
-            ),
-            default_timeout=600.0,
+            default_timeout=None,
             client_info=DEFAULT_CLIENT_INFO,
         )
 
@@ -319,17 +309,7 @@ async def synthesize_speech(
         # and friendly error handling.
         rpc = gapic_v1.method_async.wrap_method(
             self._client._transport.synthesize_speech,
-            default_retry=retries.Retry(
-                initial=0.1,
-                maximum=60.0,
-                multiplier=1.3,
-                predicate=retries.if_exception_type(
-                    core_exceptions.DeadlineExceeded,
-                    core_exceptions.ServiceUnavailable,
-                ),
-                deadline=600.0,
-            ),
-            default_timeout=600.0,
+            default_timeout=None,
             client_info=DEFAULT_CLIENT_INFO,
         )
 
diff --git a/google/cloud/texttospeech_v1/services/text_to_speech/transports/base.py b/google/cloud/texttospeech_v1/services/text_to_speech/transports/base.py
index 8fea5ae1..339d03f0 100644
--- a/google/cloud/texttospeech_v1/services/text_to_speech/transports/base.py
+++ b/google/cloud/texttospeech_v1/services/text_to_speech/transports/base.py
@@ -122,34 +122,10 @@ def _prep_wrapped_messages(self, client_info):
         # Precompute the wrapped methods.
         self._wrapped_methods = {
             self.list_voices: gapic_v1.method.wrap_method(
-                self.list_voices,
-                default_retry=retries.Retry(
-                    initial=0.1,
-                    maximum=60.0,
-                    multiplier=1.3,
-                    predicate=retries.if_exception_type(
-                        core_exceptions.DeadlineExceeded,
-                        core_exceptions.ServiceUnavailable,
-                    ),
-                    deadline=600.0,
-                ),
-                default_timeout=600.0,
-                client_info=client_info,
+                self.list_voices, default_timeout=None, client_info=client_info,
             ),
             self.synthesize_speech: gapic_v1.method.wrap_method(
-                self.synthesize_speech,
-                default_retry=retries.Retry(
-                    initial=0.1,
-                    maximum=60.0,
-                    multiplier=1.3,
-                    predicate=retries.if_exception_type(
-                        core_exceptions.DeadlineExceeded,
-                        core_exceptions.ServiceUnavailable,
-                    ),
-                    deadline=600.0,
-                ),
-                default_timeout=600.0,
-                client_info=client_info,
+                self.synthesize_speech, default_timeout=None, client_info=client_info,
             ),
         }
 
diff --git a/google/cloud/texttospeech_v1/types/cloud_tts.py b/google/cloud/texttospeech_v1/types/cloud_tts.py
index cb59a13a..4360ff61 100644
--- a/google/cloud/texttospeech_v1/types/cloud_tts.py
+++ b/google/cloud/texttospeech_v1/types/cloud_tts.py
@@ -51,6 +51,8 @@ class AudioEncoding(proto.Enum):
     LINEAR16 = 1
     MP3 = 2
     OGG_OPUS = 3
+    MULAW = 5
+    ALAW = 6
 
 
 class ListVoicesRequest(proto.Message):