thank you, it happens again… I believe it is related to wifi / network throughput…
I am sitting at 4 meters from my wifi (freebox v4) and when I put the Muse device 80 cm from me on my left side(closer to freebox), sounds is OK. When I put it on right side sounds is dirty…
When I do same test with a song having a low VBR, I cannot notice any default in sound.
This experience (right side. left side with a 900 Kbps VBR file), I can repeat it 10 times with the same song: sound will be OK on left side and KO on right side.
I don’t remember where I was, when I notice the issue the first time.