Hi MSFT team, I want to ask, If a ATL Service(.exe) is a UWP App ? to use voice assistant features on Windows. As we know, only UWP app can use voice activation/assistant. when voice activation return keyword detected, how can I get SignalId or ModelId ? according to Voice Activation Platform Developer's Guide , SignalId and ModelId are use to configuration to setup voice Activation. I want to get it due to I want to use multiple Models. thank you.

Hi clark-zh , Greetings & Welcome to the Microsoft Q&A forum! Thank you for sharing your query. An ATL Service (.exe) is not a UWP app. Voice assistant features on Windows are specifically designed to work with UWP applications due to the privacy and security features that the UWP platform provides. To get the SignalId or ModelId when voice activation returns a keyword detected, you need to register your application with the keyword detector during the setup of voice activation. The SignalId and ModelId are part of the configuration for setting up voice activation and are typically defined by the developer when registering the keyword model with the ActivationSignalDetector. You can retrieve these IDs by using the ActivationSignalDetector.CreateConfigurationAsync method during the registration process. Kindly refer these document https://learn.microsoft.com/en-us/azure/ai-services/speech-service/windows-voice-assistants-implementation-guide#implementing-voice-activation Hope this helps. Do let us know if you any further queries. If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let us know.

Voice Activation/Assistant questions on Windows

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kothapally Snigdha 1,505 Reputation points Microsoft Vendor

2025-02-05T20:25:45.1733333+00:00
Hi clark-zh,

Greetings & Welcome to the Microsoft Q&A forum! Thank you for sharing your query.

An ATL Service (.exe) is not a UWP app. Voice assistant features on Windows are specifically designed to work with UWP applications due to the privacy and security features that the UWP platform provides.

To get the SignalId or ModelId when voice activation returns a keyword detected, you need to register your application with the keyword detector during the setup of voice activation. The SignalId and ModelId are part of the configuration for setting up voice activation and are typically defined by the developer when registering the keyword model with the ActivationSignalDetector. You can retrieve these IDs by using the ActivationSignalDetector.CreateConfigurationAsync method during the registration process.

Kindly refer these document https://learn.microsoft.com/en-us/azure/ai-services/speech-service/windows-voice-assistants-implementation-guide#implementing-voice-activation

Hope this helps. Do let us know if you any further queries.

If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let us know.
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1 person found this answer helpful.
clark-zh 20 Reputation points

2025-02-06T03:50:46.8733333+00:00

Hi kothapally,

Thanks for your reply.

I think ActivationSignalDetector.CreateConfigurationAsync is initial setup before Keyword is triggered. I want to get/retrieve SignalId or ModelId when user say “hi MyAssistant”. with SignalId or ModelId, I can find out which model is using now.

I need use several models to implement multiple keywords.

kothapally Snigdha 1,505 Reputation points Microsoft Vendor

2025-02-06T22:06:21.2833333+00:00

Hi clark-zh,

To retrieve the SignalId or ModelId when a user says "hi MyAssistant," you will need to implement the keyword detection process correctly. The ActivationSignalDetector.CreateConfigurationAsync method is indeed part of the initial setup for registering your keyword model with the system.

When a keyword is detected, the application will receive a signal through the ConversationalAgentSession.OnSignalDetected event. You can handle this event to access the relevant information about the detected keyword, including the SignalId or ModelId.

To implement multiple keywords, you will need to register each keyword model separately using the ActivationSignalDetector and ensure that each model has a unique SignalId and ModelId. This way, when a keyword is triggered, you can identify which model is currently in use based on the signal received.

Kindly refer these https://learn.microsoft.com/en-us/azure/ai-services/speech-service/windows-voice-assistants-implementation-guide#implementing-voice-activation

I hope these helps you. Thank you!

clark-zh 20 Reputation points

2025-02-07T09:41:51.31+00:00

Hi kothapally,

Thanks for your patient.

As we know, UWP is not recommended now,

Does WinUI3 project support ActivationSignalDetector MVA API?

Does WinUI3 project support hardware-base keyword detection? If yes, any example?

clark-zh 20 Reputation points

2025-02-10T09:56:47.6666667+00:00

Hi kothapally,

Another questions, About app to app communication, can UWP app communicate with a WinUI3 app by using IPC such ac socket/pipe, share memory ? Is there any limitation?I want to get audio microphone PCM data by a UWP app and then share PCM data with a WinUI3 app by inter-process communication.

thanks a lot

kothapally Snigdha 1,505 Reputation points Microsoft Vendor

2025-02-11T21:27:03.7033333+00:00

Hi clark-zh,

Sorry for Delay

The ActivationSignalDetector API is part of the Multiple Voice Assistant (MVA) framework, which is designed to support voice activation in applications. While the context does not explicitly mention WinUI3 support for the ActivationSignalDetector, it is generally expected that APIs related to voice activation would be compatible with modern Windows application frameworks, including WinUI3.

Regarding hardware-based keyword detection, the context indicates that voice activation can utilize hardware keyword detection, but it does not provide specific examples for WinUI3 projects. Implementing voice activation typically involves registering the application with the background service and ensuring microphone access, which would be applicable in a WinUI3 context as well.

A UWP app can communicate with a WinUI3 app using inter-process communication (IPC) methods such as named pipes and shared memory. However, there are some limitations to be aware of:

By default, named pipes in packaged applications are supported only between processes within the same package unless a process is full trust. This means that if your UWP app and WinUI3 app are not in the same package, you may need to ensure that the WinUI3 app has the appropriate permissions.

Shared memory can be used to efficiently share large amounts of data, but similar to named pipes, it is typically restricted to processes within the same package unless full trust is granted.

When using IPC, you must manage security identifiers (SIDs) and access control lists (ACLs) to ensure that the processes can communicate securely.

For your specific use case of sharing audio microphone PCM data, you would need to ensure that both applications are set up correctly to allow for IPC and that you handle the data transfer efficiently.

kindly refer these https://learn.microsoft.com/en-us/gaming/game-bar/guide/communicating-apps#inter-process-communication-options

https://learn.microsoft.com/en-us/gaming/game-bar/guide/communicating-apps#inter-process-communication-options

I hope these helps you. Thank you!

kothapally Snigdha 1,505 Reputation points Microsoft Vendor

2025-02-13T00:05:48.46+00:00

Hi clark-zh,

Following up to see the response was helpful.

kothapally Snigdha 1,505 Reputation points Microsoft Vendor

2025-02-13T18:11:23.3633333+00:00

Hi clark-zh

Following up to see if the above answer was helpful. If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let us know.

clark-zh 20 Reputation points

2025-02-14T10:33:23.8033333+00:00

Hi kothapally,

Thank you so much for your reply. I accept your answer.

I will do more investigation later. Maybe need your help again.
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