# Issue: audio-statistic-data-change Event Does Not Return Data

**URL:** <https://devforum.zoom.us/t/issue-audio-statistic-data-change-event-does-not-return-data/112591>\
**Category:** Video SDK\
**Tags:** video-sdk\
**Created:** [June 26, 2024, 2:58am UTC](https://devforum.zoom.us/t/issue-audio-statistic-data-change-event-does-not-return-data/112591 "2024-06-26T02:58:01Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![mark.eubans](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@mark.eubans](https://devforum.zoom.us/u/mark.eubans)\
**Post date:** [June 26, 2024, 2:58am UTC](https://devforum.zoom.us/t/issue-audio-statistic-data-change-event-does-not-return-data/112591/1 "2024-06-26T02:58:01Z")

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### Issue: `audio-statistic-data-change` Event Does Not Return Data

**Video SDK Type and Version**  
VideoSDK 1.11.6 for Web

**Description**

The `audio-statistic-data-change` event is not returning data despite successfully subscribing using `session.subscribeAudioStatisticData()`. This issue occurs even when multiple participants are connected and active with audio. However, events for video and share statistics return data without any issues.

**Error?**  
No error message. The issue lies in the `audio-statistic-data-change ` event not providing expected data.

**Troubleshooting Routes**

- Tested across multiple browsers and client versions.
- Ensured proper implementation as per SDK documentation.
- Verified functionality with other statistic events (video, screen share), which are working correctly.
- Confirmed that participants’ audio is actively connected through the Account Dashboard session.

**How To Reproduce**

Steps to reproduce the behavior including:

1. 
  - Subscribe to the `audio-statistic-data-change` event using `session.subscribeAudioStatisticData()` and initialize the event listener using `client.on('audio-statistic-data-change', onAudioStatisticDataChanged)`.

2. Ensure multiple participants are actively connected with audio.
3. Observe that the event does not return any statistical data.

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<div class="post-metadata">

**Author:** ![vic.yang](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/vic.yang/32/24656_2.png) [@vic.yang](https://devforum.zoom.us/u/vic.yang)\
**Post date:** [June 26, 2024, 5:29am UTC](https://devforum.zoom.us/t/issue-audio-statistic-data-change-event-does-not-return-data/112591/2 "2024-06-26T05:29:46Z")

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Hey @mark.eubans

Thanks for your feedback.

When all users in a session are muted, the audio stream won’t be transmitted, so the `audio-statistic-data-change` event won’t be triggered. Can you check if this is the case?

If not, could you share the problematic Session ID with us for troubleshooting purposes?

Thanks  
Vic

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<div class="post-metadata">

**Author:** ![mark.eubans](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@mark.eubans](https://devforum.zoom.us/u/mark.eubans)\
**Post date:** [June 26, 2024, 5:51am UTC](https://devforum.zoom.us/t/issue-audio-statistic-data-change-event-does-not-return-data/112591/3 "2024-06-26T05:51:59Z")

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Hello @vic.yang,

Thank you for the swift response.

However, even if all the users are unmuted and speaking, the event still doesn’t transmit data.

This is the latest session ID:  
**884 2457 9277**  
**tXBUgHr2QTeYUStjonIPvA==**

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<div class="post-metadata">

**Author:** ![vic.yang](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/vic.yang/32/24656_2.png) [@vic.yang](https://devforum.zoom.us/u/vic.yang)\
**Post date:** [June 26, 2024, 7:46am UTC](https://devforum.zoom.us/t/issue-audio-statistic-data-change-event-does-not-return-data/112591/4 "2024-06-26T07:46:01Z")

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Hey @mark.eubans

Can we confirm if you called the `session.subscribeAudioStatisticData()` method earlier (before the `session.startAudio()` method returns)? If this is the case, there might be some issues.

We will improve the `subscribeAudioStatisticData()` method in the next version to eliminate the burden of calling this method.

Currently, a workaround is to delay the `session.subscribeAudioStatisticData()` method call.

Thanks  
Vic

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<div class="post-metadata">

**Author:** ![mark.eubans](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@mark.eubans](https://devforum.zoom.us/u/mark.eubans)\
**Post date:** [June 26, 2024, 8:38am UTC](https://devforum.zoom.us/t/issue-audio-statistic-data-change-event-does-not-return-data/112591/5 "2024-06-26T08:38:50Z")

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Hi @vic.yang,

Yes, the statistical data subscription for audio, video, and sharing are being called right after `client.join` and before `startAudio` or `startVideo`.

For now, I will try to modify and add a delay on calling `session.subscribeAudioStatisticData()` and will provide feedback if the workaround is successful.

Thanks,  
Mark