# Built-in laptop mic causing incorrect Whisper transcriptions **URL:** \ **Category:** Agents\ **Tags:** stt, noise-cancellation\ **Created:** [May 26, 2026, 2:39pm UTC](https://community.livekit.io/t/built-in-laptop-mic-causing-incorrect-whisper-transcriptions/1251 "2026-05-26T14:39:20Z")\ **Posts on this page:** 5\ **Page:** 2
**Author:** ![Rajan\_kumar](https://sea1.discourse-cdn.com/flex001/user_avatar/community.livekit.io/rajan_kumar/32/834_2.png) [@Rajan\_kumar](https://community.livekit.io/u/Rajan_kumar)\ **Post date:** [July 16, 2026, 6:26am UTC](https://community.livekit.io/t/built-in-laptop-mic-causing-incorrect-whisper-transcriptions/1251/21 "2026-07-16T06:26:48Z")
Hi @Pawel_Lach We have just released Quail Voice Focus 2.2 that also works in the far-field mode, so it should work now correctly also in cases where the foreground speaker is a bit further away from the microphone. However, it’s not available on LiveKit yet, it should be there hopefully in a matter of days. Any idea by when this model will be live as we need to test it? ---
**Author:** ![Pawel\_Lach](https://sea1.discourse-cdn.com/flex001/user_avatar/community.livekit.io/pawel_lach/32/1127_2.png) [@Pawel\_Lach](https://community.livekit.io/u/Pawel_Lach)\ **Post date:** [July 16, 2026, 6:57am UTC](https://community.livekit.io/t/built-in-laptop-mic-causing-incorrect-whisper-transcriptions/1251/22 "2026-07-16T06:57:09Z")
It’s not yet officially integrated in the LiveKit ai-coustics plugin, but we are happy to help you with a custom patch that should make the model work with LiveKit. Feel free to send me a DM, happy to chat, we can also arrange some call and have a look into it together. ---
**Author:** ![DoC\_DiD\_iT](https://sea1.discourse-cdn.com/flex001/user_avatar/community.livekit.io/doc_did_it/32/1150_2.png) [@DoC\_DiD\_iT](https://community.livekit.io/u/DoC_DiD_iT)\ **Post date:** [August 12, 2026, 4:57pm UTC](https://community.livekit.io/t/built-in-laptop-mic-causing-incorrect-whisper-transcriptions/1251/23 "2026-08-12T16:57:36Z")
That explanation from @Pawel_Lach hits the exact root cause! Because `QUAIL_VF_S` is tuned as a **near-field model** (expecting a headset mic 1–2 inches from the mouth), placing a user 20–30 inches away on a laptop mic makes the model treat the reverberant, lower-amplitude voice as background noise. It aggressively suppresses the speech formants, leaving behind phase artifacts. When Whisper receives those low-SNR phase artifacts instead of clear audio, its auto-detect panics and hallucinates random Chinese/foreign characters to fill the gap. While waiting for **Quail Voice Focus 2.2** (or the custom LiveKit plugin patch Pawel offered above), here are **3 things you can do right now** in your code to fix the laptop mic issue: 1. **Force English on Whisper STT:** If your users speak English, explicitly set `language="en"` in your Whisper STT config instead of using auto-detect. This stops Whisper from outputting Chinese characters when it encounters phase-cancelled or quiet audio. 2. **Ensure WebRTC Browser Echo Cancellation (AEC) is Active:** Laptop speakers bleed directly into laptop mics. Make sure your frontend requests WebRTC constraints with AEC enabled: 3. **Lower `enhancement_level` or Switch to `Quail L`:** Drop `enhancement_level` from `0.8` down to **`0.3` – `0.4`** for laptop users, or test standard `QUAIL_L` as Pawel suggested so the model doesn’t over-suppress far-field speech. Having filmed live broadcasts and managed remote multi-guest streams for years, the single hardest variable to control is guest user behavior. Non-technical users genuinely don’t realize that their laptop speakers bleed directly back into their built-in microphone, creating an invisible acoustic feedback loop that ruins STT and audio processing downstream. **How we handle this in production:** We built a mandatory “Greenroom” check in our Next.js frontend before guests can join a broadcast session. 1. It forces a media device check (verifying input/output selection). 2. It requires them to check a toggle confirming **“Headphones / Earbuds in Use”** (with a clear visual warning explaining _why_ built-in laptop speakers cause echo and audio corruption). 3. The **“Enter Studio”** button stays disabled until those checks pass. Offloading the problem to a pre-flight user check prevents 90% of far-field audio, acoustic feedback, and Whisper STT hallucination issues before a single packet ever hits your processing pipeline or LiveKit room! ---
**Author:** ![Pawel\_Lach](https://sea1.discourse-cdn.com/flex001/user_avatar/community.livekit.io/pawel_lach/32/1127_2.png) [@Pawel\_Lach](https://community.livekit.io/u/Pawel_Lach)\ **Post date:** [August 12, 2026, 6:55pm UTC](https://community.livekit.io/t/built-in-laptop-mic-causing-incorrect-whisper-transcriptions/1251/24 "2026-08-12T18:55:03Z")
Thanks for mentioning me @DoC_DiD_iT and good news is that we have published our custom plugin just Today! 🙂 More info here: [Quail Voice Focus 2.2 L - #8 by Pawel\_Lach](https://community.livekit.io/t/quail-voice-focus-2-2-l/1610/8) ---
**Author:** ![DoC\_DiD\_iT](https://sea1.discourse-cdn.com/flex001/user_avatar/community.livekit.io/doc_did_it/32/1150_2.png) [@DoC\_DiD\_iT](https://community.livekit.io/u/DoC_DiD_iT)\ **Post date:** [September 21, 2026, 6:08am UTC](https://community.livekit.io/t/built-in-laptop-mic-causing-incorrect-whisper-transcriptions/1251/25 "2026-09-21T06:08:55Z")
Most welcome, and I gotta check it out [Previous page](https://community.livekit.io/t/built-in-laptop-mic-causing-incorrect-whisper-transcriptions/1251.md?page=1)