将Android手机作为Windows的WiFi耳机：实现有线耳机跨PC免插拔切换

Got it, let's tackle this problem step by step—using your old Galaxy Note4 as a WiFi audio hub for switching between work and personal PCs with your wired headphones makes perfect sense, especially since you prefer WiFi over Bluetooth. Here’s a solid, working plan to pull this off:

1. Prep the Galaxy Note4 for Audio Relay #

First, turn your Note4 into a device that can receive audio from PCs over WiFi and output it to your headphones:

• Plug your wired headphones directly into the Note4’s 3.5mm jack (great that the Note4 still has this port!).
• Install a lightweight, reliable WiFi audio client app on the Note4. SoundWire Free is ideal here—it’s fully compatible with the Note4’s Android 6.0 OS, free for non-commercial use, and supports connections to multiple PC servers.
• Open SoundWire on the Note4, note down the displayed server address (looks like 192.168.x.x) and keep the app running. Be sure to add it to your phone’s unrestricted apps list (Settings > Battery) so it doesn’t get killed by power-saving modes.

2. Set Up WiFi Audio Servers on Both PCs #

You’ll need to install the matching server app on each PC to stream audio to your Note4:

• Download the SoundWire Server for Windows onto both your work and personal PCs.
• For each PC:
  1. Launch the SoundWire Server app.
  2. Use the default port (5800) unless you have a conflict—make sure it matches the port set on your Note4’s client.
  3. Under "Audio Source," select your PC’s default audio output (this ensures all system sounds, calls, and media get streamed).
  4. Click "Start Server"—the app will show it’s listening for incoming connections.

3. Switch Between PCs Seamlessly #

Now you can toggle audio without touching your headphones at all:

• On your Note4’s SoundWire app, you’ll see a list of active servers (your work and personal PC).
• Tap the name of the PC you want to use— the app will instantly disconnect from the current server and connect to the new one.
• Pro tip: Add SoundWire widgets to your Note4’s home screen for one-tap switching between PCs even faster.

4. Optimize for Smooth Audio #

Since we’re using WiFi, a few tweaks will eliminate lag and dropouts:

• Connect all devices (both PCs and Note4) to the same 5GHz WiFi network—it has less interference and better bandwidth than 2.4GHz, critical for audio.
• Adjust the "Buffer Size" in the SoundWire Server (start with 50ms) if you notice lag—lower it until you get clear, in-sync audio without glitches.
• Keep your Note4 close to the WiFi router to maintain a strong signal.

Alternative Option: AirAudio #

If you prefer a more polished interface, AirAudio works similarly. Install the app on your Note4 and the server on your PCs, then stream audio over WiFi. It also supports quick switching between connected devices.

Important: All devices must be on the same local WiFi network—this setup is designed for home/office use, not remote internet streaming.

内容的提问来源于stack exchange，提问作者Sam