# Troubleshooting Unity VR audio and VAD issues **URL:** \ **Category:** Unity SDK\ **Created:** [June 13, 2026, 8:26am UTC](https://forum.convai.com/t/troubleshooting-unity-vr-audio-and-vad-issues/6323 "2026-06-13T08:26:42Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![Keyur\_Sorathia](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/keyur_sorathia/32/7253_2.png) [@Keyur\_Sorathia](https://forum.convai.com/u/Keyur_Sorathia)\ **Post date:** [June 13, 2026, 8:26am UTC](https://forum.convai.com/t/troubleshooting-unity-vr-audio-and-vad-issues/6323/1 "2026-06-13T08:26:42Z")
### What do you need help with? Question ### Installation method Unity Asset Store ### Issue area Hands-Free Conversation / VAD ### Impact Normal - something is not working as expected ### Unity version 6000.0.59 ### Convai Unity SDK version 4.1.0 ### Target platform Meta Quest ### Where does it happen? Both sample and custom scene ### Short summary Multiple issues related to Hands-Free Conversation, VAD, microphone muting, TTS playback, and language detection in Unity VR application. ### What happened? We are developing a VR educational application using Convai on Meta Quest and are experiencing several conversation-related issues that affect the overall user experience. Issue 1 – Text response appears but voice never plays Occasionally, the AI successfully generates a response, but only the text is displayed. Observed behavior: User speaks. Convai processes the request successfully. The text response appears immediately. No voice response is played. The conversation appears to complete successfully on the text side, but the corresponding TTS audio is missing. Issue 2 – Long delay between text and voice We frequently observe a noticeable delay between the appearance of the text response and the start of voice playback. Observed behavior: User finishes speaking. AI text response appears quickly. Voice playback starts several seconds later. The delay is significant enough that users often assume the AI has stopped responding or that the response has failed. Issue 3 – AI speech gets interrupted by minor environmental noise The AI appears to be highly sensitive to background sounds while speaking. Examples include: People talking nearby General room noise Meta Quest microphone artifacts These sounds often cause the AI to stop speaking or interrupt its response, even when the user is not intentionally interacting with the system. ### What did you expect? 1. Every AI text response should generate a corresponding voice response. 2. Voice playback should begin immediately or with minimal delay after the text response is generated. 3. Minor environmental sounds and background noise should not interrupt the AI while it is speaking. 04.English conversations should consistently be recognized as English without unexpected language switching or mixed-language transcriptions. 05.The conversation experience should remain stable and predictable in a typical Meta Quest classroom or training environment. ### I checked the relevant documentation, resources, and similar forum posts before posting. on ### I confirm that I did not include API keys, tokens, passwords, secrets, private character data, private conversation logs, or customer data. on ---
**Author:** ![K3](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/k3/32/2611_2.png) [@K3](https://forum.convai.com/u/K3)\ **Post date:** [June 13, 2026, 8:53am UTC](https://forum.convai.com/t/troubleshooting-unity-vr-audio-and-vad-issues/6323/2 "2026-06-13T08:53:45Z")
Hello, **Welcome to the Convai Developer Forum!** Could you please share your **Character ID** and the **session IDs** where these issues occurred? Also, please make sure you are using the latest version of the **Convai Unity SDK** and test again. This will help us review the issue more accurately. ---
**Author:** ![Keyur\_Sorathia](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/keyur_sorathia/32/7253_2.png) [@Keyur\_Sorathia](https://forum.convai.com/u/Keyur_Sorathia)\ **Post date:** [June 14, 2026, 7:30am UTC](https://forum.convai.com/t/troubleshooting-unity-vr-audio-and-vad-issues/6323/3 "2026-06-14T07:30:20Z")
> [@K3](#): > > lso, please make sure you are using the latest version of the HI K3, thank you so much for quick respond .. appreciated… My character ID : 8cc31d16-4d00-11f1-98f0-42010a7be02e , **the issue was happing in alot of session so let me list those Ids .. session IDs :** | 13-06-2026 | 05:49:17 | a156d978-3e48-46ab-b004-d0c8d830710a | | | | --- | --- | --- | --- | --- | | | 12-06-2026 | 12:34:58 | c5bbea2e-7b89-4301-b6f2-e620a91be3d1 | | | | 12-06-2026 | 12:07:59 | 7c30eee2-c148-4b00-8571-ccf2ab561847 | | | | 12-06-2026 | 11:10:09 | bac556b3-d69d-4c2a-89ab-1f883c954044 | | | | 12-06-2026 | 11:06:09 | b5903875-b976-4027-b237-d8dc87b9a097 | | | | 12-06-2026 | 10:26:06 | 40b92598-7c21-4774-80d7-8cc6ed02e6a7 | | | | 12-06-2026 | 10:24:59 | ccf70bc2-80b2-4108-8b9f-9bce52e3fc99 | | | | 12-06-2026 | 10:19:09 | 14dfa3c6-c593-42e8-8952-05ed8cc9ffed | | | | 12-06-2026 | 10:10:37 | 3a48d041-8717-45c3-82cf-7b2bbaf5ad27 | | | | 12-06-2026 | 10:07:53 | dc01e9fd-b3db-49c0-b3ad-1c4eb2dd490e | | | | 12-06-2026 | 10:01:54 | 08bee77d-7c0b-451e-b88a-837906b209f1 | | | | 12-06-2026 | 09:53:22 | fac90e44-8c58-4585-ba3a-02b25ced3f36 | | | | 12-06-2026 | 09:37:58 | 92c698ad-9ca3-4b50-8117-6953f03e7df2 | | | | 12-06-2026 | 09:30:49 | 4e5ba738-31ef-40b3-98b0-7b7d77601c14 | | | | 12-06-2026 | 09:23:12 | c60fcceb-e75d-468c-b5d7-21f1f58ba285 | | | | 12-06-2026 | 09:15:12 | 55a72d41-39ce-41c5-bee9-2859e0a10b99 | | | | 12-06-2026 | 09:03:53 | 22ba66ea-ba5a-495d-9292-de505a26825f | | | | 12-06-2026 | 08:59:46 | 9413704b-309f-405f-933a-f6136b2b6a70 | | | | 12-06-2026 | 08:46:49 | e704562c-fe81-46ba-9b3e-152a35de302f | | | | 12-06-2026 | 08:40:46 | 13fce981-18bf-4b38-9939-0acbdc02a81f | | | | 12-06-2026 | 07:34:37 | cb0e6664-e928-450c-ac2e-d2d0d50dea7d | | | | 12-06-2026 | 07:28:06 | 8b28e513-4762-4249-849a-57aec2ee25c0 | | | | 12-06-2026 | 05:41:11 | 0149ed85-ebef-4605-8a85-31b3a2a6d1f0 | | | | 11-06-2026 | 11:25:28 | 9d6f99da-0da5-4096-8e9e-33ec641ede57 | | | | 11-06-2026 | 11:14:28 | 21597724-9d03-43ca-b6ce-072af205c254 | | | | | | | | ---
**Author:** ![K3](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/k3/32/2611_2.png) [@K3](https://forum.convai.com/u/K3)\ **Post date:** [June 14, 2026, 10:35am UTC](https://forum.convai.com/t/troubleshooting-unity-vr-audio-and-vad-issues/6323/4 "2026-06-14T10:35:42Z")
Could you please test with **gemini-3.5-flash** and let us know if the issue still occurs? ---
**Author:** ![Keyur\_Sorathia](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/keyur_sorathia/32/7253_2.png) [@Keyur\_Sorathia](https://forum.convai.com/u/Keyur_Sorathia)\ **Post date:** [June 17, 2026, 10:01am UTC](https://forum.convai.com/t/troubleshooting-unity-vr-audio-and-vad-issues/6323/5 "2026-06-17T10:01:14Z")
It started working. Now it has stopped again. it is an unreliable system. We have been testing for months now, and the responses are unsatisfactory. First, i tried Gemini 3.5 Flash as you had suggested. It worked for a few hours, although giving extrenely weird and long responses. At one point, it answered back that i cannot answer this question and i am tired of answering for the same question. Which AI does that? After a few hours, it stopped working. Now I have tried with flash lite, openAI models and even claude, but it does not work. it answers only in text. When asked, it responds that it can only answer in text. ---
**Author:** ![K3](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/k3/32/2611_2.png) [@K3](https://forum.convai.com/u/K3)\ **Post date:** [June 17, 2026, 10:16am UTC](https://forum.convai.com/t/troubleshooting-unity-vr-audio-and-vad-issues/6323/6 "2026-06-17T10:16:33Z")
Could you please test the same character directly on **[convai.com](http://convai.com)** and let us know if the issue still occurs there? I checked on my side, but I’m not seeing this behavior, and we have not received similar reports from other users. It may be related to your project setup or implementation, so testing directly on [convai.com](http://convai.com) will help us confirm whether the issue is with the character/backend or with the project integration. ---
**Author:** ![Keyur\_Sorathia](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/keyur_sorathia/32/7253_2.png) [@Keyur\_Sorathia](https://forum.convai.com/u/Keyur_Sorathia)\ **Post date:** [June 20, 2026, 4:04am UTC](https://forum.convai.com/t/troubleshooting-unity-vr-audio-and-vad-issues/6323/7 "2026-06-20T04:04:21Z")
I tried talking to the character on a laptop, which does not work. I tried on a mobile phone - which started working. For VR, it is showing weird respones. In a few VR headsets, it responds back via audio, whereas in a few VR headsets - it is only responding in text. We are using Meta Quest 3S. Do you know to encounter this problem? ---
**Author:** ![K3](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/k3/32/2611_2.png) [@K3](https://forum.convai.com/u/K3)\ **Post date:** [June 20, 2026, 4:13am UTC](https://forum.convai.com/t/troubleshooting-unity-vr-audio-and-vad-issues/6323/8 "2026-06-20T04:13:00Z")
We are preparing an update that is expected to address this issue. Once the update is released, I will let you know so you can test again. ---
**Author:** ![Keyur\_Sorathia](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/keyur_sorathia/32/7253_2.png) [@Keyur\_Sorathia](https://forum.convai.com/u/Keyur_Sorathia)\ **Post date:** [June 20, 2026, 4:25am UTC](https://forum.convai.com/t/troubleshooting-unity-vr-audio-and-vad-issues/6323/9 "2026-06-20T04:25:07Z")
So, does it mean you are working on an update to overcome VR working issue - working in a few VR headsets and not working in the remaining? Also, any expected date for the update? We are unable to commit to this feature in our product mainly because of its unexpected behaviour ---
**Author:** ![K3](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/k3/32/2611_2.png) [@K3](https://forum.convai.com/u/K3)\ **Post date:** [June 24, 2026, 10:08am UTC](https://forum.convai.com/t/troubleshooting-unity-vr-audio-and-vad-issues/6323/10 "2026-06-24T10:08:09Z")
Yes, we are working on an update related to this issue. The update is currently under review by the Unity Asset Store. Once it is approved, it will be published. We expect it to be available within the next few days, depending on the Unity Asset Store review process. ---
**Author:** ![K3](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/k3/32/2611_2.png) [@K3](https://forum.convai.com/u/K3)\ **Post date:** [June 25, 2026, 9:56am UTC](https://forum.convai.com/t/troubleshooting-unity-vr-audio-and-vad-issues/6323/11 "2026-06-25T09:56:13Z")
Could you please update and try again? ---
**Author:** ![system](https://canada1.discourse-cdn.com/flex004/uploads/convai/original/1X/e60ef96aa7334c5ccf6682f6c6dbc20fcfa96b49.png) [@system](https://forum.convai.com/u/system)\ **Post date:** [June 28, 2026, 9:57am UTC](https://forum.convai.com/t/troubleshooting-unity-vr-audio-and-vad-issues/6323/12 "2026-06-28T09:57:01Z")
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