Alexa and audio feedback is far too loud and no apparent means of adjusting. TV inaudible if set sound to Alexa. Seems a common problem on Internet. Will try a firmware update today.
Having exactly the same issue, have had to mute the Alexa / assistant sound due to the ludicrously loud volume! If there's a resolution and anyone can help I'd appreciate it.
I have been having a go at Samsung online help but without much help. They did not understand the issue. My problem is compounded by having an older telly with fewer audio out options. My partner has telly with HDMI and optical out but she struggled getting a reliable setting and told me to take soundbar away. However I thought I had solved it with firmware update but what I had done was turn telly volume to zero, Freeview box volume to 100 and soundbar volume fairly low. This works pretty well though possibly Alexa a tad loud at when you start to increase soundbar volume. The problem I have is I output through digital coax into a optical converter so soundbar only works with telly and not PlayStation/dvd as that does not have a volume control so is inaudible. My options are either get a audio to optical converter and try audio out from telly headphone socket or buy a new telly and hope there is a good setting configuration that works and make sure nothing is changed (so that I don't jump out of my skin when audio feedback is unexpectedly very loud).
What a faff!
Same problem with my new SB61 and a Roku TV. If I can hear the TV, Alexa is insanely loud. It's like they need input volume controls. If you find a fix, please post it!
I think I have found easier workaround.
I just ask "Alexa, you speak to loud comparing to other sounds"
As a result normal TV volume is restored.
Anyway it's obvious firmware bug and have to be fixed by Samsung.