docs: update ReplicatedVoiceConfig.mime_type comment

Google APIs · copybara-github · commit 9ae82e1bbec9 · 2025-12-02T11:47:41.000-08:00
PiperOrigin-RevId: 839364684
diff --git a/google/cloud/aiplatform/v1beta1/content.proto b/google/cloud/aiplatform/v1beta1/content.proto
@@ -192,9 +192,10 @@ message PrebuiltVoiceConfig {
 
 // The configuration for the replicated voice to use.
 message ReplicatedVoiceConfig {
-  // Optional. The mimetype of the voice sample. Currently only
-  // mime_type=audio/pcm is supported, which is raw mono 16-bit signed
-  // little-endian pcm data, with 24k sampling rate.
+  // Optional. The mimetype of the voice sample. The only currently supported
+  // value is `audio/wav`. This represents 16-bit signed little-endian wav data,
+  // with a 24kHz sampling rate. `mime_type` will default to `audio/wav` if not
+  // set.
   string mime_type = 1 [(google.api.field_behavior) = OPTIONAL];
 
   // Optional. The sample of the custom voice.
