Turn your phone into a wireless PC audio headset.
Stream bit-perfect 48kHz uncompressed audio directly to your Android earphones over local Wi-Fi. Experience sub-2.67ms latency, dedicated Microsoft-certified virtual drivers, 3D spatial surround sound, and reverse phone microphone streaming.
How to Use NullWire & Configure Audio
Follow these 4 simple steps to route your Windows audio to your phone with zero hassle.
Configure Windows Sound Output
Click the Sound icon on your Windows taskbar (bottom right) and select your active playback device (e.g. Realtek Speakers, Headphones, or Virtual Audio Cable).
Connect on Wi-Fi or USB Tethering
Ensure your PC and Android phone are on the same Wi-Fi network (5GHz Wi-Fi is recommended for sub-3ms speed).
Launch & Start Streaming
Open NullWire on Windows. Select your audio device from the dropdown, click your discovered Android phone in the list, and click "Start Streaming".
Use Reverse Phone Microphone
In NullWire Pro on Android, tap "Start Phone Mic". On your PC, click "Receive Phone Mic".
Built for Gamers, Streamers & Audiophiles
Everything you need for low-latency wireless sound and voice streaming.
Sub-2.67ms DMA Latency
Direct WASAPI loopback capture on Windows and native Android AAudio MMAP hardware playback for zero perceptible sound delay.
Certified Virtual Audio Driver
Integrated Microsoft-certified WHQL driver endpoint for silent background PC audio capture without needing physical speakers plugged in.
Bit-Perfect 48kHz Master PCM
Pure, uncompressed 16-bit 48,000 Hz CD/studio master quality stream directly to your earphones with zero lossy codec artifacts.
4 Acoustic Sound Profiles
Tailored DSP presets: Gaming (2.67ms low latency), Hi-Fi Harman curve, Cinema 3D widening, and Bit-Perfect Direct mode.
3D Binaural Spatial Audio
Virtual 7.1 pinna spatial crossfeed modeling realistic interaural time and level differences for pinpoint gaming directional cues.
Reverse Phone Microphone
Use your phone or connected headset mic as a wireless PC microphone in Discord, TeamSpeak, and OBS with acoustic echo cancellation.
HUD & In-App Notifications
Live latency & jitter monitoring HUD with floating system status toast notifications for instant connection updates.
Deep Clean Uninstaller Suite
Full driver uninstaller cleans up Driver Store OEM packages, deletes virtual audio services, and refreshes the Windows PnP tree.
Choose Your NullWire Edition
Download the streamlined free player or the full studio suite.
NullWire
Clean, lightweight, single-purpose audio streaming player.
- ✓ Direct 48kHz lossless PCM audio streaming
- ✓ Single-screen clean minimalist interface
- ✓ 1-Click automatic Wi-Fi LAN discovery
- ✓ Real-time hardware audio level meter
- ✓ Zero DSP overhead and minimal RAM usage
NullWire Pro
Complete audio studio with Microsoft-certified virtual drivers, 4 DSP sound profiles, and reverse mic.
- ✓ Microsoft-Certified Virtual Audio Cable Driver included
- ✓ 100% Bit-Perfect 48kHz / 16-Bit Master PCM pipeline
- ✓ Complete uninstallation suite (Driver Store sweep & cleanup)
- ✓ 4 Sound profiles (Gaming, Hi-Fi, Cinema 3D, Direct)
- ✓ 3D Binaural HRTF virtual 7.1 spatial surround
- ✓ Reverse wireless phone microphone for Discord / OBS
- ✓ Real-time HUD & in-app floating toast notifications
100% Safe, Virus-Free & Open-Source
Select a guide below for interactive step-by-step setup, audio configuration, and safety guarantees.
Microsoft Windows Defender displays a generic "Windows protected your PC — Unknown Publisher" notice for all newly published independent open-source software that does not pay $400/year for enterprise corporate certificates. NullWire is 100% clean, safe, and virus-free.
Click "More info"
When the Windows SmartScreen dialog appears, click the underlined More info link on the prompt.
Click "Run anyway"
Click the Run anyway button that appears at the bottom to start the setup wizard immediately.
File Properties Unblock
Alternatively, right-click Setup.exe ➔ Properties ➔ Check Unblock ➔ OK.
NullWire uses direct Windows WASAPI loopback to capture high-definition stereo audio from any active audio device on your PC. Here is how to configure your sound routing:
Select Playback Device
Click the Sound icon on your Windows taskbar. Choose your primary sound output (e.g. Realtek Audio, Headphones, or VB-Audio Virtual Cable).
Select Device in NullWire
Open NullWire Pro. In the Audio Source dropdown, choose the same playback device to capture game & music sound.
Silent Physical Speakers
To stream exclusively to your phone without PC speaker sound, switch Windows output to a virtual device (or plug dummy earphones into PC).
Zero Cloud Servers & 100% Local
Audio is streamed directly peer-to-peer over your local home Wi-Fi or USB tethering. No audio data ever leaves your network, and no accounts or logins are required.
100% Publicly Auditable Code
Every single line of C++ Windows code and Kotlin Android code is open-source and hosted on GitHub for full community verification.
No Malware, Adware or Bloat
NullWire contains zero third-party telemetry, bundled toolbars, or silent background processes. When you exit NullWire, it stops immediately.
Because NullWire is distributed directly as an APK without Google Play account lock-in, Android displays a standard prompt asking for permission to install apps from your browser or file manager.
Download APK
Download NullWire.apk on your Android device from the download section.
Allow Unknown Source
When prompted by Android, tap Settings and toggle on "Allow from this source".
Install & Stream
Tap Install. Launch NullWire, connect to your Wi-Fi, and enjoy sub-2.67ms audio!
NullWire Pro includes a deep uninstallation engine. When uninstalled, it removes all binaries, deletes virtual audio cable services, sweeps OEM packages from the Windows Driver Store, and refreshes the Windows PnP device tree.
Windows Settings
Open Windows Settings ➔ Installed Apps ➔ Find NullWire Pro ➔ Click Uninstall.
Automated Driver Sweep
Uninstall.exe automatically invokes driver uninstallation, deletes driver services, and purges Driver Store packages.
Zero Background Residue
All application files, shortcuts, audio endpoints, and registry settings are completely purged from your system.
Frequently Asked Questions
Yes, 100%. NullWire is an open-source audio streaming tool with zero viruses, malware, adware, or background telemetry. It communicates strictly peer-to-peer over your local home network (LAN) using standard UDP audio sockets. All source code is publicly inspectable on GitHub.
You can set your default Windows audio output to a Virtual Audio Cable (like VB-Cable) and select that device in NullWire, or connect a 3.5mm headphone plug into your PC. NullWire captures the loopback PCM stream directly and plays it out through your phone's earphones.
Choose NullWire Standard if you want lightweight, instant audio streaming with zero extra settings. Choose NullWire Pro if you want real-time frequency spectrum visualizers, 4 acoustic profiles (Gaming, Hi-Fi, Cinema, Direct), 3D spatial surround sound, reverse phone microphone streaming, and notifications.
Connect your PC and Android phone over a 5GHz Wi-Fi network for optimal wireless performance. For tournament or wired setups, enable USB Tethering on your Android phone; NullWire will stream directly through the virtual Ethernet adapter with sub-2ms latency.
Yes. In NullWire Pro, tap Start Phone Mic in the Android app and click Receive Phone Mic on PC. Your phone or connected headset microphone will stream back to Windows with acoustic echo suppression and automatic gain control.
Get started with zero-latency audio today.
100% free, open-source, and local wireless audio streaming for Windows and Android.