Volume fluctuation with streaming music

I'm experiencing this issue too and I use Amazon Music as my music provider. I've noticed that the loudness usually occurs when the song changes from playing in Dolby Atmos to Ultra HD. 

For example, I've been streaming music by Bonobo (most of my playlist in Dolby Atmos) and when a different song came on in Ultra HD the audio went WAY UP. I had to grab my phone and pause the song. It's an annoying issue. 

I have an Arc in my living room and a Sonos One in my office. I've only encountered this issue in my living room. 

The Sonos One is not capable of playing Atmos on it’s own, so that explains why you have have not encountered the issue in the office.

If you grouped the living room with office, the Amazon Music stream would be limited to Ultra HD (at the expense of Atmos)

Other solutions would be to only play playlists solely of Dolby Atmos music, or set a volume limit so the max volume was still listenable.

There is another thread where this is being discussed.

Sonos arc and Amazon music.  Wild fluctuations in volume.  This is ridiculous.  I've been a huge sonos fan but something is definitely not right. 

Submit diagnostics within 10 minutes of experiencing this, and call Sonos Support directly to discuss it.

I'm having this issue. Prime Unlimited Music with Arc 5.1

Had a song playing at around level 30, next song required me to turn it down to 5! It was so loud I thought the speakers were going to blow. This is only using Prime Unlimited through the Sonos App and playlists. What is the fix for this?

See @Airgetlam’s post just above yours and speak with Sonos Support and be sure to give them your diagnostic report reference, which ideally should be submitted within 20 minutes of you hearing the issue.

Thanks, I totally scrolled past that one. Will do going forward. 

So just wanted to let everyone know what Sonos told me yesterday after calling and submitting a diagnostic report. Listening to Amazon Music Unlimited, had a playlist I created going, and had to lower one song’s volume from a 12 down to a 1 and it was still audible enough for most people. 

On the phone with Sonos and after looking into reports, community forums etc...he finally said they are reviewing and documenting it. Said that we should contact Amazon about it to let them know since it seems to be on their side. 

He also said to use a different music services if possible. I will try to contact Amazon today and see what they have to say. I doubt it will go far with them...

What few Amazon tracks cause the issue you’re seeing and is it only when you are playing to an Atmos capable speaker, like the Arc HT setup, or do you see it when playing to other Sonos speakers aswell, like a Sonos One, Roam etc? Does the issue go away if you group the Arc setup with another Sonos Room?

One more question, do you have crossfade enabled, or disabled. and does that make any difference to the volume fluctuations you’re hearing?

I am only noticing it when playing on my Arc system which is paired with 2 Plays and Sub, “Living Room”. 

I do not notice it doing it when I group the “Living Room” with “Roam” or other rooms. 

What I noticed yesterday is when playing a Playlist; I had a song that was HD then Ultra HD. Both songs were fine...Then the next song was Ultra HD and even at Volume level 1 it was fairly loud. But at our normal level of 9-12 it was deafening. I will say one song for sure that always blasts loud is Ice Cube, “It was a Good Day”. 

I do not have Crossfade on.

This also seems to only happen with Playlists. So if I am listening to an artist’s album, no issue. I guess because they are all HD or Ultra or Atmos.