I have the same issue. Recent updates of Spotify do not help. Any action inside Spotify - Search, skip Track, whatever - makes the oscillating sound. Can confirm it only happens when listening over Bluetooth.
I don't know how to turn off the equalizer in Android. One can only choose wich Equalizer app to use, but I find no option to choose none.
I've been having the same problem since I started using Spotify in the last month! It's annoying to the point where I'm going to stop paying for it! Anytime I'm playing music through Bluetooth, anytime I turn my screen on or off, or use other applications, or randomly in the middle of a song, the music plays a horrible buzzing screechy sound for a second or two then resumes.
While this is not the ideal fix, you can eliminate the noise by opening Spotify in your device, pressing on Settings, scrolling to Audio Effects and setting Equalizer to Off. You then may have to skip to the next track to stop the noise. Then you can join the rest of us waiting for Spotify to give us a definitive solution.
Hey John, sadly that does not help. My loud buzzing noise is not constant, it just randomly occurs. Sometimes it happens 5 times during 1 song and othertimes it's fine for a few songs.
In Spotify Equalizer settings, it is nicely integrated with Cyanogenmod and instead of seeing the On or Off option, it actually directs me to the built in DSP Manager. But like I said, all settings in DSP Manager are disabled for me.
I am not familiar with Cyanogenmod or its advantages over the regular Spotify app. Still, would it be possible to replace Cyanogenmod with the latter on a temporary basis while waiting for a fix from Spotify? This is not an elegant solution, but it could eliminate the irritating noise problem.
Yeah, Cyanogenmod is a complete replament for the stock Android operating system.
And unfortunately, after doing more research, this issue seems to be related to all Android devices running 4.4 and higher and listening to music through bluetooth. So it's not related to Spotify at all. It's happening on different phones and music streaming services like Google Play Music.