TEAC AI-303 connected via bluetooth. Browser plays sound (Tidal, Youtube) but no Systemsounds at all

Troubleshooting System Sound Issues with TEAC AI-303 Connected via Bluetooth on Windows 11

Introduction

Building a high-fidelity desktop audio system can be an exciting yet complex process, especially when integrating multiple components such as DACs, amplifiers, and various output devices. A common scenario involves connecting a TEAC AI-303 DAC/AMP to a Windows 11 PC via Bluetooth. While streaming applications like YouTube and Tidal may function correctly, users often encounter issues where system sounds are absent or inaudible. This guide aims to diagnose and resolve such problems, ensuring a seamless audio experience.

Understanding the Setup

Hardware Components:
Laptop: Dell XPS 13 9310
Operating System: Windows 11 (latest updates applied)
Audio Device: TEAC AI-303 DAC/AMP
Connection Method: Bluetooth pairing
Output: Passive speakers or headphones connected to TEAC
Initial Observations:
Bluetooth pairing is successful
Streaming audio via browsers or dedicated apps plays normally
System sounds (notifications, test sounds) are silent or very faint
TEAC AI-303 is set as the default audio device
The device appears in the Bluetooth device list as an audio output

Common Issues and Troubleshooting Steps

Verify Default Audio Device Settings
Ensure that the TEAC AI-303 is set as the default playback device.
Open Windows Sound Settings:
Right-click the speaker icon in the taskbar and select “Sound settings.”
Under “Output,” confirm that TEAC AI-303 is selected.
Test system sounds:
Use the “Test” button in the “Advanced sound options” or “App volume and device preferences.”
Confirm whether any sound plays. If not, proceed with further steps.
Check Volume Levels and Enhancements
Confirm that device and system volume levels are turned up.
Disable any audio enhancements:
In Sound Settings, select the TEAC device, click “Properties.”
Navigate to the “Enhancements” tab.
Check “Disable all enhancements.”
Test again for system sounds.
Verify Bluetooth Audio Profile
Bluetooth devices can operate in different profiles (A2DP for streaming, HFP/HSP for calls).
Confirm that the TEAC AI-303 is connected using the A2DP profile, which is optimized for