Just wanted to add my two cents here as I finally found a solution for this crackling/cutting out/out of sync problem.
The problem: When two or more devices are in a group, they periodically go out of sync, make a crackling sound, and/or stop playing for a few seconds. It happens at totally random intervals, sometimes it doesnât happen for a whole day, and sometimes it happens so often that the system is practically unusable. It seems to get worse the more devices I add to the group. When the problem occurs, it mostly only effects the grouped devices that are not set as the âhostâ. Although occasionally the host device will also crackle and stop playing for a few seconds.
I initially thought the issue was caused by the mesh network, but (for me at least) it turned out to be interference from a neighboring network on the same wifi channel.
For reference I have the tp link deco x4300 pro mesh network with 3 access points. I am using 3x up2stream pro, 1x v4 amp stereo, 1x 2.1 plate amp, and 1x amp sub. I often put all 6 devices in one group, but sometimes as few as 2.
This is everything I tried that did not fix the problem
- I set each up2stream to âhigh priorityâ (qos)
- I turned off roaming and set a preferred router on all the up2stream devices so they only connect to their nearest router
- I repositioned all of the antennas so that they all have line of sight to a router, in the same room, with no obstructions, and away from any other electronics. (This is ridiculous and should not by necessary, but I was desperately looking for a solution)
- I added an access point to the dining room where I have an up2stream, despite the fact that the device had a strong signal and was very close to another access point on the other side of a wall.
- I tried setting each up2stream as the host. No matter which device is host, all other linked devices crackle and cut out at the same time, while the host device continues playing with no issue.
- I primarily use spotify connect so I tried other input methods to see if spotify was the issue, it happens with every input and streaming service.
The following solution completely fixed the problem
Customer support said it is most likely interference from a device on the same wifi channel, which can slow down the data rate which causes lagging and eventually the crackling, stopping, and desynchronization. They said to look for a setting on my router to change the wifi channel.
I went into my router settings and found an option called ânetwork optimizationâ, which scans the network for issues (Iâm not sure why it doesnât just do this automatically). The scan found that the 2.4g channel had a lot of interference (which Iâm guessing is from a neighborâs house). It recommended switching from channel 5 to channel 10, so I did that. Now the scan doesnât find any interference.
Since I changed the 2.4g channel I have had not a single interruption, even with up to 6 devices in the same group, all over the house, including one in a detached garage.
Your router may or may not give you the ability to scan for conflicts and change the channel, this solution is for my specific mesh network. I would imagine other mesh networks or routers that come with a mobile app would offer a similar feature. I believe there are 3rd party apps and websites that will at least do the scanning part.
I hope this helps someone who is having this problem!