clarify env vars must be named as shown

Author: eric-urban

articles/cognitive-services/Speech-Service/includes/how-to/speech-synthesis/cpp.md

@@ -205,6 +205,7 @@ std::string getEnvironmentVariable(const char* name);
 
 int main()
 {
+    // This example requires environment variables named "SPEECH_KEY" and "SPEECH_REGION"
     auto speechKey = getEnvironmentVariable("SPEECH_KEY");
     auto speechRegion = getEnvironmentVariable("SPEECH_REGION");
 

articles/cognitive-services/Speech-Service/includes/how-to/speech-synthesis/csharp.md

@@ -196,6 +196,7 @@ using Microsoft.CognitiveServices.Speech;
 
 class Program 
 {
+    // This example requires environment variables named "SPEECH_KEY" and "SPEECH_REGION"
     static string speechKey = Environment.GetEnvironmentVariable("SPEECH_KEY");
     static string speechRegion = Environment.GetEnvironmentVariable("SPEECH_REGION");
 

articles/cognitive-services/Speech-Service/includes/how-to/speech-synthesis/go.md

@@ -407,6 +407,7 @@ func wordBoundaryHandler(event speech.SpeechSynthesisWordBoundaryEventArgs) {
 }
 
 func main() {
+    // This example requires environment variables named "SPEECH_KEY" and "SPEECH_REGION"
 	speechKey := os.Getenv("SPEECH_KEY")
 	speechRegion := os.Getenv("SPEECH_REGION")
 

articles/cognitive-services/Speech-Service/includes/how-to/speech-synthesis/java.md

@@ -214,6 +214,7 @@ import java.util.Scanner;
 import java.util.concurrent.ExecutionException;
 
 public class SpeechSynthesis {
+    // This example requires environment variables named "SPEECH_KEY" and "SPEECH_REGION"
     private static String speechKey = System.getenv("SPEECH_KEY");
     private static String speechRegion = System.getenv("SPEECH_REGION");
 

articles/cognitive-services/Speech-Service/includes/how-to/speech-synthesis/javascript.md

@@ -351,6 +351,7 @@ Here's an example that shows how to subscribe to events for speech synthesis. Yo
     var sdk = require("microsoft-cognitiveservices-speech-sdk");
 
     var audioFile = "YourAudioFile.wav";
+    // This example requires environment variables named "SPEECH_KEY" and "SPEECH_REGION"
     const speechConfig = sdk.SpeechConfig.fromSubscription(process.env.SPEECH_KEY, process.env.SPEECH_REGION);
     const audioConfig = sdk.AudioConfig.fromAudioFileOutput(audioFile);
 

articles/cognitive-services/Speech-Service/includes/how-to/speech-synthesis/python.md

@@ -197,6 +197,7 @@ def speech_synthesizer_word_boundary_cb(evt: speechsdk.SessionEventArgs):
     print('\tTextOffset: {}'.format(evt.text_offset))
     print('\tWordLength: {}'.format(evt.word_length))
 
+# This example requires environment variables named "SPEECH_KEY" and "SPEECH_REGION"
 speech_config = speechsdk.SpeechConfig(subscription=os.environ.get('SPEECH_KEY'), region=os.environ.get('SPEECH_REGION'))
 
 # Required for WordBoundary event sentences.

articles/cognitive-services/Speech-Service/includes/quickstarts/speech-to-text-basics/cpp.md

@@ -50,6 +50,7 @@ Follow these steps to create a new console application and install the Speech SD
     
     int main()
     {
+        // This example requires environment variables named "SPEECH_KEY" and "SPEECH_REGION"
         auto speechKey = GetEnvironmentVariable("SPEECH_KEY");
         auto speechRegion = GetEnvironmentVariable("SPEECH_REGION");
         

articles/cognitive-services/Speech-Service/includes/quickstarts/speech-to-text-basics/csharp.md

@@ -50,6 +50,7 @@ Follow these steps to create a new console application and install the Speech SD
 
     class Program 
     {
+        // This example requires environment variables named "SPEECH_KEY" and "SPEECH_REGION"
         static string speechKey = Environment.GetEnvironmentVariable("SPEECH_KEY");
         static string speechRegion = Environment.GetEnvironmentVariable("SPEECH_REGION");
 

articles/cognitive-services/Speech-Service/includes/quickstarts/speech-to-text-basics/go.md

@@ -74,6 +74,7 @@ Follow these steps to create a new GO module.
     }
 
     func main() {
+        // This example requires environment variables named "SPEECH_KEY" and "SPEECH_REGION"
         speechKey :=  os.Getenv("SPEECH_KEY")
         speechRegion := os.Getenv("SPEECH_REGION")
 

articles/cognitive-services/Speech-Service/includes/quickstarts/speech-to-text-basics/java.md

@@ -85,6 +85,7 @@ Follow these steps to create a new console application for speech recognition.
     import java.util.concurrent.Future;
 
     public class SpeechRecognition {
+        // This example requires environment variables named "SPEECH_KEY" and "SPEECH_REGION"
         private static String speechKey = System.getenv("SPEECH_KEY");
         private static String speechRegion = System.getenv("SPEECH_REGION");