S2 Update 14.12 Sub Issues

Hello,

With the recent 14.12 S2 Update there is a bug in the sub settings when using Trueplay, and I've pinpointed the problem.  I wanted to pass along this information to the company to ensure that the specifics of the issue are known.

It’s likely that most people may not notice this, or bother asking Sonos about it, but this is a real difference between 14.12 and the previous versions.

• My current setup has an Arc, Sub(Gen1), and 2 Play1's.  
  • Using a white noise generator to review these differences.  
  • I'm controlling the sub settings on my iPad Pro while recording on my iPhone 12 Pro Max.  
  • I've run Trueplay twice since the update, and get the same results both times.  
    • Both Trueplay runs were with my iPhone as my iPad Pro does not have support yet.
• Once updated to 14.12, you are prompted to re-run Trueplay.  But Trueplay has a bug in this new update.
• I tested the frequencies with Trueplay On and then Off without changing the volume on the App.  
  • The only setting modified is the "Sub Audio" setting that ranges from -15 to +15
• These differences are absolutely unique to the 14.12 update
  • I did not take pics, but have done similar tests before and the sub settings always increase/decrease all of the frequencies below the crossover
  • In previous versions, 40hz was always the highest db of any frequency when bossting the sub volume.

Trueplay On with Bass and Treble set to 0:  

• Sub = 0: 
  • There is about a 4-5db reduction in the 30-60hz range and a boost in the 60-80hz range compared to Trueplay off

  • 

     

• Sub = +15: 
  • Here is where you see the issue.  Sub 50hz doesn't change much at all even boosting the sub setting to the max  
  • There is a huge boost in the 60-80hz range where it is now the dominate frequency range of the sub

  • 

     

Trueplay Off with Bass, and Treble set to 0:  

• Sub = 0
  • You can already see a difference in that the <50hz frequencies are higher and it's a pretty flat wave.

  • 

    
     
• Sub = +15
  • Notice that now the dominate frequency range is the 35-50hz.  
  • The 60-80hz is still boosted, but it does not ever overtake the lower frequencies

  • 

     

• Lastly, here is a grouped view showing these pictures side by side so you can really see the difference.
  • It also includes going -15 on the sub

  • 

     

• Could it be a High Pass Filter setting that is getting triggered when you run TruePlay?
• If you do not like the way your system sounds after 14.12, turn off Trueplay.
  • It will not be as good as what you are used to as Trueplay will adjust more to your room and leave less peaks/valleys throughout the spectrum.
  • But it will still be more like what you are used to hearing.

I can provide more information if needed, but hopefully this helps pinpoint the issue for everyone.  

Thank you for your time,

Robert