Update voice sync for avatar descriptions

Author: Zhifan Zhang

articles/ai-services/speech-service/text-to-speech-avatar/batch-synthesis-avatar-properties.md

@@ -35,7 +35,7 @@ The following table describes the avatar properties.
 | avatarConfig.subtitleType                | Type of subtitle for the avatar video file could be `external_file`, `soft_embedded`, `hard_embedded`, or `none`.<br/><br/>This property is optional, and the default value is `soft_embedded`.|
 | avatarConfig.backgroundImage           | Add a background image using the `avatarConfig.backgroundImage` property. The value of the property should be a URL pointing to the desired image. This property is optional. |
 | avatarConfig.backgroundColor             | Background color of the avatar video, which is a string in #RRGGBBAA format. In this string: RR, GG, BB and AA mean the red, green, blue, and alpha channels, with hexadecimal value range 00~FF. Alpha channel controls the transparency, with value 00 for transparent, value FF for non-transparent, and value between 00 and FF for semi-transparent.<br/><br/>This property is optional, and the default value is #FFFFFFFF (white).|
-| avatarConfig.useBuiltInVoice             | A boolean value indicating whether to use the voice sync for avatar as the synthesis voice. This property can only be used when using custom avatar trained with voice sync for avatar. When set to `true`, the synthesis will use the voice sync for avatar as the voice, ignoring the voice setting in `synthesisConfig` or in SSML.<br/><br/>This property is optional, and the default value is `false`. |
+| avatarConfig.useBuiltInVoice             | A boolean value indicating whether to use the voice sync for avatar as the synthesis voice. This property can only be used when using custom avatar trained with voice sync for avatar. When set to `true`, other voices specified in `synthesisConfig` or in SSML will be ignored. <br/><br/>This property is optional, and the default value is `false`. |
 | outputs.result                           | The location of the batch synthesis result file, which is a video file containing the synthesized avatar.<br/><br/>This property is read-only.|
 | properties.DurationInMilliseconds        | The video output duration in milliseconds.<br/><br/>This property is read-only.  |