Title: Some users notice degraded audio quality in some Microsoft Teams calls in which any user is connecting using a Cloud PC
User impact: Users may notice degraded audio quality in some Microsoft Teams calls in which any user is connecting using a Cloud PC.
More info: This issue specifically impacts one-on-one calls that are expanded to group calls in which any member of the call meets all the following conditions:
– At least one user is connecting to the call using a Cloud PC.
– At least one user is connecting using an integrated speaker as the output device and an external microphone as the input device.
Users can successfully bypass the issue using the following methods:
– Affected users can mute and then unmute themselves to clear the issue.
– Users can use the same audio device for both audio input and output to avoid the issue.
Current status: We’ve identified an issue in which a subset of users may experience degraded audio quality in some Microsoft Teams calls in which any user is connecting using a Cloud PC. A change to update the WebRTC versions, which is an open-source programming interface, is resulting in a code regression to the echo cancellation path, which filters our background noise and echoes during calls, when using a Cloud PC. Our fix for this issue is being validated and is on track to be released in early March 2024. We’re reaching out to a sample set of users to test to ensure this fix remediates the issue as intended.
Scope of impact: A subset of users in Microsoft Teams calls in which another user is connecting using a Cloud PC are impacted.
Start time: Wednesday, September 27, 2023, at 6:43 PM UTC
Root cause: A change to update the WebRTC versions, which is an open-source programming interface, is resulting in a code regression to the echo cancellation path, which filters our background noise and echoes during calls, when using a Cloud PC.
Next update by: Wednesday, March 6, 2024, at 12:30 AM UTC
