Open Source & Free

One Sound. Many Devices.

Stream system audio to multiple Bluetooth, USB, and wired devices simultaneously — with real-time per-device volume & latency control.

Download for Windows View on GitHub

Windows 10/11

No Install Required

MIT License

🎧

Bluetooth

🔊

Speaker

🎵

USB DAC

🎤

Monitor

🎶

Wired

Features

Everything you need for multi-device audio

Professional-grade audio routing with a beautiful, intuitive interface.

🔊

Multi-Device Output

Stream to unlimited audio devices in parallel. Bluetooth headphones, USB speakers, wired monitors — all at once.

🎯

Latency Compensation

Auto-syncs faster devices to the slowest. Fine-tune per-device delay from 0–500ms for perfect lip-sync.

🔈

Real-Time Volume

Per-device volume control from 0–200% with instant adjustment — no buffer delay, no interruptions.

📊

Live Monitoring

Waveform visualization, buffer health bars, and latency readouts — see your audio pipeline in real-time.

🔄

Auto-Reconnect

Bluetooth device disconnected? SyncWave gracefully handles it and polls for reconnection automatically.

🚫

Echo Prevention

Auto-detects the source device and skips it to prevent the feedback loop that causes audio doubling.

💾

Profile Persistence

Device selection, volume levels, and delay settings are automatically saved and restored between sessions.

🎨

Dark Theme UI

Beautiful modern WPF interface with cyan-purple gradient accents designed for comfortable, extended use.

How It Works

Engineered for perfect sync

A sophisticated audio pipeline built on Windows Core Audio (WASAPI).

System Audio Capture

WASAPI loopback captures all system audio in real-time at native quality — games, music, calls, everything.

Latency Measurement

Each device's hardware latency is measured via AudioClient.StreamLatency. The maximum is used as the sync baseline.

Delay Compensation

High-performance circular buffers insert calculated delays: maxLatency − deviceLatency + manualOffset

Volume Scaling & Output

Real-time volume scaling (0–200%) applied per-device, then routed through WasapiOut to each physical device.

Tech Stack

Built with modern technology

.NET

.NET 8 (C#)

Runtime

WPF

WPF (XAML)

UI Framework

♪

NAudio 2.2.1

Audio Library

WASAPI

Core Audio API

<10%

CPU Usage

~100ms

Pipeline Latency

Buffer Depth

GC Pressure