MSI Katana B13 Bluetooth Audio Stuttering Windows 11

Bluetooth headphones or speakers connected to your MSI Katana B13 produce choppy, stuttering audio – the sound cuts in and out every few seconds, especially when WiFi is active. This is a 2.4GHz radio interference issue between the Intel AX211 WiFi and Bluetooth radios sharing the same adapter.

This guide covers WiFi band switching, Bluetooth coexistence settings, and driver updates to eliminate Bluetooth audio stuttering on the MSI Katana B13 in Windows 11.

“Bluetooth headphones stuttered badly on my Katana B13 whenever WiFi was active. Switched to 5GHz WiFi and the stuttering disappeared completely. 2.4GHz WiFi and Bluetooth cannot coexist well on this chip.” – Fariq, music producer from Kuala Lumpur

Why Bluetooth Audio Stutters on MSI Katana B13

The Intel AX211 adapter in the MSI Katana B13 handles both WiFi 6E and Bluetooth 5.3 on a single chip. When both WiFi (on 2.4GHz band) and Bluetooth audio are active simultaneously, the chip uses coexistence algorithms to time-share the 2.4GHz radio, which reduces Bluetooth audio bandwidth below what A2DP needs for smooth playback. Switching WiFi to 5GHz or 6GHz eliminates this competition.

• WiFi connected to 2.4GHz band interfering with Bluetooth A2DP audio stream
• Intel AX211 Bluetooth coexistence algorithm reducing audio bandwidth during WiFi bursts
• Bluetooth adapter USB selective suspend interrupting audio stream briefly
• Audio codec set to SBC which is more susceptible to bandwidth reduction than aptX

Fix 1 – Switch WiFi to 5GHz Band

On your router, connect the MSI Katana B13 to the 5GHz network instead of 2.4GHz. The 5GHz and 6GHz bands do not interfere with Bluetooth 2.4GHz radio. Once on 5GHz WiFi, Bluetooth audio should play without stuttering. If your router does not have a separate 5GHz SSID, go to Device Manager – Intel AX211 Properties – Advanced tab and set Preferred Band to Prefer 5GHz band.

Fix 2 – Disable Bluetooth Coexistence Throttling

Open Device Manager, right-click Intel Wi-Fi 6E AX211, select Properties – Advanced tab. Find Bluetooth Coexistence Mode or Bluetooth Coexistence/WLAN Coexistence and disable it or set it to WLAN Priority Only. This reduces WiFi performance slightly on 2.4GHz but eliminates Bluetooth audio stuttering completely by removing the coexistence throttling on the Bluetooth radio.

USB Selective Suspend for Bluetooth

Open Power Options – Advanced settings – USB settings – USB selective suspend – set to Disabled for both plugged in and on battery. The Intel AX211 is connected to the system via USB internally and USB suspend events cause brief Bluetooth radio interruptions that manifest as audio glitches during playback.

Fix 3 – Update Intel Bluetooth Driver from MSI Support

Go to msi.com/support, select MSI Katana B13, and download the Intel Bluetooth driver for Windows 11. Versions 22.230 and later include improved A2DP coexistence scheduling that reduces audio stuttering when 2.4GHz WiFi is unavoidably active.

Fix 4 – Pair to AAC or aptX Device

If your Bluetooth audio device supports AAC or aptX codec (usually listed in the device specifications), the higher-efficiency codec uses bandwidth more efficiently than SBC, making audio less susceptible to coexistence throttling. Pair with an AAC or aptX capable headphone if available. Right-click the Bluetooth audio device in Sound settings to see which codec is active.

Frequently Asked Questions

Why is Bluetooth audio stuttering on MSI Katana B13?

2.4GHz WiFi and Bluetooth share the Intel AX211 chip and interfere. Switch WiFi to 5GHz to eliminate the interference and stop stuttering.

How do I fix Bluetooth audio stutter on MSI Katana B13?

Switch to 5GHz WiFi, disable Bluetooth coexistence throttling in adapter Advanced settings, and update the Intel Bluetooth driver from MSI Support.

Does MSI Katana B13 have a separate Bluetooth chip?

No – Intel AX211 is a combo WiFi 6E and Bluetooth 5.3 adapter. Both radios share the same chip and antenna.

What codec does Bluetooth audio use on MSI Katana B13?

Default is SBC. Intel AX211 also supports AAC and aptX for compatible devices, which are more resilient to bandwidth reduction from coexistence throttling.

Conclusion

Bluetooth audio stuttering on MSI Katana B13 in Windows 11 is a 2.4GHz radio interference issue between WiFi and Bluetooth on the Intel AX211 combo adapter. Switching WiFi to 5GHz is the most effective fix. Disabling Bluetooth coexistence throttling and disabling USB selective suspend provide additional stability. Updating the Intel Bluetooth driver from MSI Support ensures the latest coexistence improvements are applied.