In hear a lot of this... mostly on 20m. I hear computer sign on sounds, people talking on voice, music and whatever. It has been going on for past few years.
Mostly I believe it's a bunch of people who use their computer for everything when they should have a dedicated computer for ham radio only.
From: "'K9HW' k9hw@... " <070@...>
Sent: Sunday, March 5, 2017 1:01 PM
Subject: RE:  14.070 Music
Haven't heard it here today, rarely hear music but there is at least one station out there that uses the computer soundcard for audio. Quite often you can hear it boot or other computer sounds. One day you could hear him playing solitaire! Doesn't mute the mic either, I've been able to hear voices in the background but not enough to identify the station of course. Fortunately it doesn't usually last very long nor is it all that frequent but it does happen.
From: 070@... [mailto:070@...]
Sent: Sunday, March 05, 2017 10:40 AM
To: 070 List Service 070 List Service
Subject:  14.070 Music
First time I've ever heard something like this - is it common????
Will QSY to 40m, I guess.