Alternative A2DP Driver Version History

Improvements:

• Windows 11 Unified Audio Endpoint now works with all input formats.
• Windows built-in sound effects (bass boost, headphone virtualization, and loudness equalization) can be enabled.
• Implemented workaround for Audio-Technica ATH-M50xBT2 firmware bug (headphones do not automatically connect on power-up).

Bug Fixes:

• System crash (BSOD) on old (before 1st gen Intel Core) processors.

• Sound could be distorted after pausing and resuming the audio stream.
• A2DP connection could be unstable if your device implements AVDTP delay reporting incorrectly. Workaround implemented for such devices.
• Improved robustness of driver install/uninstall operations.

• Added AAC CODEC support.

• If you use WASAPI exclusive mode and control the audio stream format (sampling frequency, channel count, bit resolution) from the media player application, you may not hear any sound after changing the format. (This is a bug introduced in version 1.3.1)

• Some headphones (including Sennheiser CX Plus True Wireless and HUAWEI FreeBuds 5) may fail to establish an A2DP connection on their power on.
• You will hear noise if you select LDAC or aptX-HD CODEC and enable both 16-bit and 24-bit resolution options.

• Added Chinese (Simplified and Traditional), German, Japanese, Korean, Polish, and Russian localization.
• Added 16-bit input format support for LDAC and aptX HD CODECs.
• Updated the user interface to make it easier to select Windows 11 "Unified Audio Endpoint" compatible parameters.

See a FAQ topic for more information.

• Added aptX and aptX HD CODEC support.

• Added Adaptive Bit Rate (ABR) support for LDAC CODEC. (ABR for SBC CODEC is coming soon)
• Some headphones stop playing A2DP audio after using A2DP/HFP simultaneously. Workaround was implemented in the driver.

• Sound could be distorted after pause/resume when using A2DP in exclusive mode.

NOTE: This version is technically the same as preview version 1.0.5.35. If you are using that version, you can safely skip version 1.1.0.

• Compatibility with the media player programs that use the WASAPI interface.
• Reduce the need to restart the system after switching the driver.
• Volume control using the Windows UI may not work with some headphones.

NOTE: This version is technically the same as preview version 1.0.4.32. If you are using that version, you can safely skip version 1.0.5. If you are using preview version 1.0.4.26, we strongly recommend updating to version 1.0.5. There is a possibility of a system crash (BSOD) with version 1.0.4.26.

• Device connects to PC normally and is recognized as a stereo rendering device, but no sound comes out of device if the Absolute Volume feature is not enabled

Absolute Volume can be disabled by:

• Setting the DisableAbsoluteVolume registry value to non-zero
• Disabling it with Bluetooth Tweaker
• Your device is old, and the feature is not supported
• Device fails to connect after setting the SBC bitpool value above the device's maximum bitpool value.

• Better recovery from extended bad radio situations. (recovers quickly as radio quality improves)
• Less popping noise after the pause to play transition

• In very rare cases, driver could cause BSOD when it is unloaded

• Driver may hang when a device is connected

• LDAC CODEC support
• Absolute volume support