What controller device?

Did you follow the FAQ guide?

https://support.sonos.com/en-us/article/tune-your-sonos-speakers-with-trueplay

Many other suggestions there.

https://support.sonos.com/en-us/search?q=trueplay

Yes, I’ve done all of that and I’m running iOS on iPhone 15pro. Any other suggestions?

Hi ​@Utahgimmie2, welcome to the Sonos Community!

I’m sorry to hear you’re having issues with finalizing Trueplay on your system. We have a support article which gives some tips on resolving errors during Trueplay, so I’d recommend following the steps listed in that article to see if they help resolve this for you.

What isn’t listed in the article that I’d also recommend doing is to clean the microphone ports on your iPhone, remove the case from your iPhone if you have one, or try a different iOS device if possible.

If these steps don’t help resolve this, then I’d recommend reaching back out to our support team. You can point to this thread showing what you’ve done when you reach out.

I hope this helps!

You might also check for appliances such as refrigerators, microwaves, freezer units and the like that maybe producing background noise, outside/inside noise from HVAC systems. I once had a cable box that was emitting a low noise that interfered. Also, moving your device too fast can cause the operation to fail. Also make sure you stay inside the “bubble” for all speakers. Last, if your space is gymnasium size TruePlay will fail .

Close other apps and disconnect Bluetooth devices

Other apps running in the background that use your iOS devices microphone can interfere with Trueplay. Make sure to force-close these apps before you begin tuning. Additionally, make sure to disconnect any Bluetooth headphones or speakers before tuning as these can also interfere with Trueplay.

This solved it for me! Turned off bluetooth on my Apple Watch (no other bluetooth devices were connected at the time) and the Trueplay tuning worked perfectly