Merge pull request #261962 from ForrestGumb/patch-9

Update rest.md

Author: prmerger-automator[bot]

articles/ai-services/speech-service/includes/how-to/professional-voice/create-training-set/rest.md

@@ -53,15 +53,20 @@ You should receive a response body in the following format:
 
 ## Upload training set data
 
-To upload a training set of audio and scripts, use the `TrainingSets_UploadData` operation of the custom voice API. Construct the request body according to the following instructions:
+To upload a training set of audio and scripts, use the `TrainingSets_UploadData` operation of the custom voice API.
+
+Before calling this API, please store recording and script files in Azure Blob. In the example below, recording files are https://contoso.blob.core.windows.net/voicecontainer/jessica300/*.wav, script files are
+https://contoso.blob.core.windows.net/voicecontainer/jessica300/*.txt. 
+
+Construct the request body according to the following instructions:
 
 - Set the required `kind` property to `AudioAndScript`. The kind determines the type of training set. 
 - Set the required `audios` property. Within the `audios` property, set the following properties:
-  - Set the required `containerUrl` property to the URL of the Azure Blob Storage container that contains the audio files.
+  - Set the required `containerUrl` property to the URL of the Azure Blob Storage container that contains the audio files. Use [shared access signatures (SAS) for a container](/azure/storage/blobs/sas-service-create-dotnet-container#create-a-service-sas-for-a-container) with both read and list permissions.
   - Set the required `extensions` property to the extensions of the audio files. 
   - Optionally, set the `prefix` property to set a prefix for the blob name. 
 - Set the required `scripts` property. Within the `scripts` property, set the following properties:
-  - Set the required `containerUrl` property to the URL of the Azure Blob Storage container that contains the script files.
+  - Set the required `containerUrl` property to the URL of the Azure Blob Storage container that contains the script files. Use [shared access signatures (SAS) for a container](/azure/storage/blobs/sas-service-create-dotnet-container#create-a-service-sas-for-a-container) with both read and list permissions.
   - Set the required `extensions` property to the extensions of the script files.
   - Optionally, set the `prefix` property to set a prefix for the blob name.