[VoiceLive] Remove redundant speech-start response cancellations

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: Yulin Li

samples/voicelive/agent-voice-assistant/AgentVoiceAssistant.cs

@@ -106,7 +106,7 @@ private async Task ProcessEventsAsync(CancellationToken cancellationToken)
         {
             await foreach (SessionUpdate update in _session!.GetUpdatesAsync(cancellationToken).ConfigureAwait(false))
             {
-                await HandleUpdateAsync(update, cancellationToken).ConfigureAwait(false);
+                await HandleUpdateAsync(update).ConfigureAwait(false);
             }
         }
         catch (OperationCanceledException)
@@ -115,7 +115,7 @@ private async Task ProcessEventsAsync(CancellationToken cancellationToken)
         }
     }
 
-    private async Task HandleUpdateAsync(SessionUpdate update, CancellationToken cancellationToken)
+    private async Task HandleUpdateAsync(SessionUpdate update)
     {
         _logger.LogDebug("Received event: {EventType}", update.GetType().Name);
 
@@ -143,8 +143,6 @@ private async Task HandleUpdateAsync(SessionUpdate update, CancellationToken can
                 if (_audioProcessor != null)
                     await _audioProcessor.StopPlaybackAsync().ConfigureAwait(false);
 
-                try { await _session!.CancelResponseAsync(cancellationToken).ConfigureAwait(false); }
-                catch (Exception ex) { _logger.LogDebug(ex, "No response to cancel"); }
                 break;
 
             case SessionUpdateInputAudioBufferSpeechStopped:

samples/voicelive/basic-voice-assistant/BasicVoiceAssistant.cs

@@ -11,7 +11,6 @@ namespace Azure.AI.VoiceLive.Samples;
 /// <remarks>
 /// This sample now demonstrates some of the new convenience methods added to the VoiceLive SDK:
 /// - ClearStreamingAudioAsync() - Clears all input audio currently being streamed
-/// - CancelResponseAsync() - Cancels the current response generation (existing method)
 /// - ConfigureSessionAsync() - Configures session options (existing method)
 ///
 /// Additional convenience methods available but not shown in this sample:
@@ -208,16 +207,6 @@ private async Task HandleSessionUpdateAsync(SessionUpdate serverEvent, Cancellat
                     await _audioProcessor.StopPlaybackAsync().ConfigureAwait(false);
                 }
 
-                // Cancel any ongoing response
-                try
-                {
-                    await _session!.CancelResponseAsync(cancellationToken).ConfigureAwait(false);
-                }
-                catch (Exception ex)
-                {
-                    _logger.LogDebug(ex, "No response to cancel");
-                }
-
                 // Demonstrate the new ClearStreamingAudio convenience method
                 try
                 {

samples/voicelive/basic-voice-assistant/README.md

@@ -20,7 +20,6 @@ This sample now demonstrates some of the new convenience methods added to the Vo
 **Used in this sample:**
 - `ClearStreamingAudioAsync()` - Clears all input audio currently being streamed
 - `ConfigureSessionAsync()` - Configures conversation session options
-- `CancelResponseAsync()` - Cancels the current response generation
 - `SendInputAudioAsync()` - Sends audio data to the service
 
 **Additional convenience methods available:**

samples/voicelive/customer-service-bot/CustomerServiceBot.cs

@@ -413,15 +413,6 @@ private async Task HandleSessionUpdateAsync(SessionUpdate serverEvent, Cancellat
                     await _audioProcessor.StopPlaybackAsync().ConfigureAwait(false);
                 }
 
-                // Cancel any ongoing response
-                try
-                {
-                    await _session!.CancelResponseAsync(cancellationToken).ConfigureAwait(false);
-                }
-                catch (Exception ex)
-                {
-                    _logger.LogDebug(ex, "No response to cancel");
-                }
                 break;
 
             case SessionUpdateInputAudioBufferSpeechStopped speechStopped:

samples/voicelive/mcp-voice-assistant/MCPVoiceAssistant.cs

@@ -205,8 +205,6 @@ private async Task HandleUpdateAsync(SessionUpdate update, CancellationToken can
                 if (_audioProcessor != null)
                     await _audioProcessor.StopPlaybackAsync().ConfigureAwait(false);
 
-                try { await _session!.CancelResponseAsync(cancellationToken).ConfigureAwait(false); }
-                catch (Exception ex) { _logger.LogDebug(ex, "No response to cancel"); }
                 break;
 
             case SessionUpdateInputAudioBufferSpeechStopped:

sdk/voicelive/Azure.AI.VoiceLive/tests/BasicVoiceAssistantLogicTests.cs

@@ -101,7 +101,7 @@ public override async Task ClearStreamingAudioAsync(CancellationToken cancellati
         }
 
         [Test]
-        public void SpeechStartedEvent_CancelsResponseAndClearsStreamingAudio()
+        public void SpeechStartedEvent_StopsPlaybackAndClearsStreaming()
         {
             // This test demonstrates how BasicVoiceAssistant.HandleSessionUpdateAsync would be tested
             // if the samples were accessible from the test project.
@@ -112,7 +112,7 @@ public void SpeechStartedEvent_CancelsResponseAndClearsStreamingAudio()
                 "1. Add project reference to BasicVoiceAssistant sample in test project, OR " +
                 "2. Move BasicVoiceAssistant to the main SDK with dependency injection support. " +
                 "Expected behavior: SessionUpdateInputAudioBufferSpeechStarted should call " +
-                "CancelResponseAsync(), ClearStreamingAudioAsync(), and StopPlaybackAsync().");
+                "StopPlaybackAsync() and ClearStreamingAudioAsync(), but not CancelResponseAsync().");
         }
 
         [Test]