Extremely loud buzzing / interference noise occurring at random during playback

[gawd]

Build: 976
Device: FiiO M11 Plus 
Android version: 10

Description: I have encountered this issue twice before where an extremely loud buzzing / static noise (almost like screeching) will interrupt the playing audio. The sound that plays is genuinely ear piecing and I don't doubt that it could damage your hearing or whatever is connected. This sound has only occurred while playing with a wired connection using a 3.5 aux, and seems to be somewhat uncommon. The first time experiencing this was when my M11 plus was connected to my sound system in my car about a week ago, and the second time with some wired headphones about an hour ago. I would have initially assumed this was a problem with my M11 plus but this seems to occur with any device I plug in. During the second time this "screeching noise" bug occurred I tried to do some testing to collect info about the problem. I tried playing a Youtube video after the loud sound started playing, and Youtube worked just fine. Switching back to PA would result in the loud noise continuing to play when I unpaused the music. Alongside this, it seems that the volume slider directly affects how loud the noise is, which leads me to believe this is a problem with PA rather than my M11 plus. Unfortunately, I don't have much info on how this sound happens to play in the first place. I wasn't doing anything with my player when the sound occurred in my car. During the second time this sound played, I was constantly dragging the play head back on the currently playing song while adjusting an EQ profile. I did some searching around and this thread from 2014 seems to most accurately describe the issue (it quite literally sounds like a 'sound from hell'). I can't really use PA anymore due to this as I can't risk having these blow out my speakers / headphones, or my ears.

Edited April 30 by gawd

[M07]

Same happened to me today. Shooking sound, very loud it threw me out of the world. I have Fiio m11, i disabled 32 bit sampling and it was gone, I'm not sure if this is the cause but I'm sure it has to do with audio settings. Probably something with sampling rate or somewhere in the signal process where amp/dac doesn't match the app sample rate or whatever caused to be stuck and make "Hell noise". 

It happened after I paused the music for few minutes then played. I would never want to have this experience again, ear piercing indeed!!

Honestly I might just go back to Fiio music app just because of this. Its not the first time I face weird problems, I had heavy distorting sound, noise, static. All of them are unknown why it happened. I love Poweramp but such experiences are very disturbing. 

Maybe its the fact that its very advanced and you never know which setting you tweaked caused the issue. Alot of audio processing knowledge is needed to pinpoint the problem. 

Edited June 6 by M07