Every speaker plays the same second, so it all sounds like one room.
HomeSounds Sync sends Apple Music to your HomePods and the wired speakers on your Mac at once. It hands each speaker its own tiny delay, so the echo you used to hear collapses into a single, clean sound.
The song spills into the room twice.
The HomePod across the room arrives a fraction late, so vocals smear, drums double, and the whole space sounds like a hallway with the reverb stuck on. You've nudged volumes, unplugged a speaker, given up and picked just one. It was never the music. It was the timing.
Hold each speaker back by exactly the right amount.
AirPlay buffers audio before a HomePod plays it, so a wired speaker on your Mac runs ahead. HomeSounds Sync gives every local speaker its own delay that you tune by ear: nudge it up if the desk speaker leads, down if the HomePod leads, and stop the moment the echo collapses into one voice. Most setups land around 1.5–2 seconds. That moment — the room closing up around a single sound — is the whole point.
A small idea with careful plumbing.
Apple Music stays on Computer output. HomeSounds Sync captures that stream with a Core Audio process tap, sends a delayed copy to each local speaker, and streams the same audio to your HomePods through OwnTone over AirPlay 2 — which keeps the HomePods in step with each other, so your local speakers only align to one reference.
delay 1.6s
delay 2.1s
HomePods AirPlay 2
It fits your setup, not the other way around.
Two HomePods in the living room, a wired pair on the desk, a DAC or a monitor in the closet — add as many as you have. The lists grow as your devices appear, and everything is saved automatically.
Per-device delay
Tune each speaker by ear until the echo vanishes.
Many at once
Multiple HomePods and multiple Mac speakers, together.
Any local output
Wired, USB, monitor, audio interface, or DAC.
Grows live
Speaker lists refresh as devices appear on your network.
Saved per device
Delay, volume, and selection persist across sessions.
English & 한국어
Switch the whole UI on the fly.
Honest tools age better than magic ones.
MIT-licensed, with the full source on GitHub — the capture code, the ring buffer, the sync engine, the tests, the setup script. And the trade-offs, up front:
- About two seconds of total latency you can't remove — the AirPlay buffer is just like that. For music, only the sync between speakers matters.
- Each local speaker needs its own delay; device latencies differ.
- AirPlay 2 here leans on OwnTone's reverse-engineered support, so an Apple update could break it someday.
- No account, no telemetry, no upsell.
Clone, run setup, flip your speakers on.
You'll need macOS 15+ (Sequoia), Homebrew, and Xcode Command Line Tools. setup.sh installs dependencies, builds everything, and wires up the audio.
git clone https://github.com/techjuicelab/homesounds-sync
cd homesounds-sync
./setup.sh