Audio sync problem with multiple HomePod after update to IOS18

Why do all my Homepods play the same music at different times after updating to IOS18? It doesn't happen in IOS17! There are more than 5 Homepods in my place. After I started to play for a while, maybe 3-5 songs, the audio does not sync anymore! It does like the delay time is a mess with the system!

HomePod, 18

Posted on Sep 20, 2024 1:21 AM

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Posted on Mar 18, 2025 5:52 PM

Hi, Since you have multiple HomePods, the issue might be related to Wi-Fi signal strength. Some HomePods that are farther from the router may experience weaker signals, causing the delay.


Try grouping all your HomePods closer to the router and test again. If the problem persists, follow these steps:




Possible Solutions:

• Restart your router

• Restart all your HomePods

• Sign out of your iCloud account and sign back in

• Check if your devices need software updates

• Ensure all HomePods are connected to the same Wi-Fi network

• Unplug all HomePods, wait 2–3 minutes, and plug them back in

• Toggle the Lossless Audio option in your iPhone settings and the Home app

• If your router supports both 2.4GHz and 5GHz bands, try connecting all HomePods to 5GHz. If that doesn’t help, switch to 2.4GHz


Alternative Solution:

• Reset all your HomePods

• Reset your router


Let me know if any of these steps help!

74 replies

Mar 14, 2025 12:25 PM in response to Chadlien

Hello good people!


After months of audio problems with HomePods and AppleTV, iPhone or AirPlay—it’s hard to say exactly which—I’ve finally found a solution. I’ve tested it for a while now, and there are NO issues regardless of the app or device. I’ve tried it with Apple Music and Spotify in AppleTV and iPhone, and it now works flawlessly. I should also mention that I’m running the iOS 18.4 Developer version on all my devices. The problems I experienced were crackling sounds or sync issuesafter a while as I tried playing on multiple HomePods in the home, usually playing on different HomePods in stereo pairs, and the speakers in the stereo pairs losing sync.


Now for the solution. In my case, it was IGMP/multicast-related. My switches had IGMP snooping enabled—as did my Asus WiFi(Mesh) routers—but they only had IGMP snooping activated on WiFi. I had to enable multicast routing on the LAN as well. On Asus devices, you can find these settings under Wireless > Professional and LAN > IPTV. Now everything works perfectly again.


Hope this helps someone find a solution.


\Dan

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Audio sync problem with multiple HomePod after update to IOS18

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