Audio problem on LinOS 18.1 - Xiaomi Mi 9 SE Questions & Answers

Hi, there!
I'm having an issue with audio on LineageOS 18.1. Whenever any audio is played through the phone's speaker (videos, music), the material pauses after 5-10 seconds and when someone calls me or the alarm goes off, the sound is interrupted every 4 seconds. When I connect Bluetooth headphones, videos and music play without any problem. I had a similar issue with MIUI 12.5, then I switched to MIUI 12 and the problem disappeared.
At that time, I thought it was a software problem, but now I'm confused. Where should I look for the cause of the problem? Is it software or hardware related?
I would appreciate any tips.

I was having increasingly bigger audio problems on LinOS 18.1 (including complete loss of sound through BT), so I upgraded to LinOS 20. The problems still persist, with varying intensity. I tried using the 'Disable Headphone' application, but it didn't help either. Am I understanding correctly that the audio/BT on the phone's motherboard is malfunctioning?

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[Q] low sound output on headphones

when i listen to music on my zenfone ,maximum volume is very low also music lags when using other applications,tried reflashing the firmware and other headphones but that didnt work any one got any idea?
two ways to get higher music volume on ZF2:
1) Turn off the equalizer in Music, that seems to help.
2) Get some different earphones, the Asus bundled items are significantly quieter than any others that I have tried. **Sorry, I see that you have tried others, but keep trying, I use Skullcandy and Jays, and both are much better**
With regards to the sound lag (its not just Musisc, it happens with calls and other apps too) when multi-tasking, Asus has been made aware of this (see the "Audio Issues" thread on Zentalk forum), and may, or may not be working on a fix....
Some people say that turning off System Sounds in settings reduces the sound lag, but I can't say that it has helped me. This is the single bug that most annoys me with this phone.
tried updating music fx plugin that came preinstalled to a newer version it improved the sound output a little bit,thanx by the way.
I think latest update (V2.17.40.12_20150515) has fixed this issue... Please update and check as many users are reporting that the bug has been fixed...
Full change log:
1. Fix location picker crash issue when attaching location info by Messaging
2. Fix Live Wallpaper settings issue when in landscape mode
3. Improve Camera App overall stability
4. Reduce the occurrence of the issue that words sometimes fail to come out when typing
5. Shorten the required time of setup calls
6. Fix outgoing call problems when using back key
7. Fix "No SIM or SIM error" issue when calling the phone number starting with 911, 112
8. Improve image quality in detail.
9. Fixed the audio sound maybe lag when using headset
10. Improve signal bar stability
11. Fixed the interruptions mode issue.
12. Fixed flip cover cannot support some apps issue.
13. Fixed the issue which shows up others app when swiching off contacts
14. Fixed Fresh Green cannot be used by ASUS ZenUI issue
15. Fixed bluetooth is easy to disconnect issue.
16. Fixed low voice issue with headset issue
17. Fixed video appears abnormal issue.
18. Fixed sound interference issue while using headset
19. Fixed Gallery issue
Overandout said:
This is the single bug that most annoys me with this phone.
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Click to collapse
I'm on 2.19.40.20 and still have this annoying issue both on normal audio and speaker, which is always too quiet for any hands-free or outdoor use
Is there any workaround ? (rooted phone)
Do you think that Viper4android or whatever could help to raise the sound levels ?
Disabled MaxxAudio
misrakushagra93 said:
when i listen to music on my zenfone ,maximum volume is very low also music lags when using other applications,tried reflashing the firmware and other headphones but that didnt work any one got any idea?
Click to expand...
Click to collapse
(I own an Asus Zenfone 2E so I don't know if this will work with the Zenfone 2) I disabled (AudioWizard/com.asus.maxxaudio) and rebooted. Tada! Headphone output is a crap ton louder! Hope this helps! I also deleted the MusicFX plugin. Don't know which one of those worked but one of them certainly did!
This is what I disabled using NoBloat(Remove spaces) http: //i.imgur. com/NO7dvls.jpg?1
Having your headphones suddenly become more quiet than usual, whether it’s on both earbuds or just one, happens quite more often than you’d think. Before we discuss how to fix the problem of your headphones being so quiet, it’s important that we understand why it happens in the first place.
Here are the most common reasons why headphones become quiet:
Issue With the Plug or Socket (For Wired Headphones)
Issue With Connectivity (For Wireless Headsets)
Device Settings
Issue With the Audio File
Issue With the Headset Itself
Issue With the Ear

Bluetooth audio stutter/skipping

This is incredibly frustrating. I had none of these issues with bluetooth on my S8+ whatsoever.
So one annoying thing that stood out was the bluetooth on this device. It keeps skipping and stuttering tracks whenever I play it on my Bose QuietComfort 35. It's normal on all my other wired cans but I usually use the QC35 alongside my phone during commutes.
Just to clarify, I'll list down all the "fixes" that I've tried. Obviously NONE of them fixed, or even alleviated the problem.
Cleared cache (this one just doesn't make sense imo)
Removed battery optimization on my music apps
Turned off WiFi & Bluetooth scanning
Switch Bluetooth audio codecs
Updated to 4.7.6
and PLEASE... if you DON'T have this problem, do NOT post how you DON'T HAVE THIS PROBLEM here, I'm looking for fixes, not jokes. Thank you.
I also have a QC35 and I don't have any issue but I post anyway
Joking aside I'm using 4.7.6 and my QC35's firmware is 1.3.4 and using the HBC codec.
What's your bose firmware ?
What do you use as a music player ? (I'm using the default Google Play music)
And what do you mean my "It's normal on all my other wired cans" ? Why would wired headphones have stutters ?
raptor2003 said:
I also have a QC35 and I don't have any issue but I post anyway
Joking aside I'm using 4.7.6 and my QC35's firmware is 1.3.4 and using the HBC codec.
What's your bose firmware ?
What do you use as a music player ? (I'm using the default Google Play music)
And what do you mean my "It's normal on all my other wired cans" ? Why would wired headphones have stutters ?
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Click to collapse
Everything's the same as you except I use PowerAmp as my music player and SoundCloud for streaming (both stutters/skips as well). I stated that I didn't have this problem on my wired headphones just to clarify.
I notice the problem most when I'm commuting and I have mobile data turned on. It went even more haywire when I downloaded something on Google Drive. Hopefully it gets addressed with Android Oreo and the official Bluetooth audio codecs being implemented.
Oh bad me I read the you said it was normal to have stutters while being red... Night too short.
I'll trying PowerAmp to see how it goes.
raptor2003 said:
Oh bad me I read the you said it was normal to have stutters while being red... Night too short.
I'll trying PowerAmp to see how it goes.
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Click to collapse
I think it has something to do more with the connections. It goes even bonkers when I'm moving around rather than laying in one place.
EpsilonT51b said:
This is incredibly frustrating. I had none of these issues with bluetooth on my S8+ whatsoever.
So one annoying thing that stood out was the bluetooth on this device. It keeps skipping and stuttering tracks whenever I play it on my Bose QuietComfort 35. It's normal on all my other wired cans but I usually use the QC35 alongside my phone during commutes.
Just to clarify, I'll list down all the "fixes" that I've tried. Obviously NONE of them fixed, or even alleviated the problem.
Cleared cache (this one just doesn't make sense imo)
Removed battery optimization on my music apps
Turned off WiFi & Bluetooth scanning
Switch Bluetooth audio codecs
Updated to 4.7.6
and PLEASE... if you DON'T have this problem, do NOT post how you DON'T HAVE THIS PROBLEM here, I'm looking for fixes, not jokes. Thank you.
Click to expand...
Click to collapse
I think I saw somewhere it's an issue with aptx HD, try to force Bluetooth codec in advanced settings to aptx or sbc.
vkass said:
I think I saw somewhere it's an issue with aptx HD, try to force Bluetooth codec in advanced settings to aptx or sbc.
Click to expand...
Click to collapse
I just said that switching Bluetooth codecs didn't work.
I'm having Bluetooth quality issues as well, particularly crackling and skipping. I noticed that if I download a file while streaming the quality will drop dramatically and the audio stream will crackle like crazy. I have tried all three codecs in nougat to no avail.
Should I upgrade to Oreo to get this sorted? Do custom kernels cause issues with the quality?
Thanks.
OnePlus 5t, theOne 7.1.1 (stock basically), viper4arise and Dolby
Update: when into EX Kernel Manager (specifically under the misc I/O settings), and change the I/O from ZEN to FIOPS. Not once has the music stuttered since, though I have only tested on SBC. If I get more results I'll bring them in.
Please note - I am on blu_spark, and I honestly do think it may have been the cause of the bluetooth skips/scratchiness. I turned off Dolby Atmos and Viper just to be sure.
Latest Oreo Beta build. Stream bluetooth, Pandora, iHeart and talk on the hands free no problems here. Lexus CT200h vehicle.
Would really check your cars manufacturer website. Most have a section where you can download latest firmware to a USB and flash your car to ensure you have the latest bluetooth firmware.
Working flawlessly on my car.
Anyone have any experience with the Oreo update?
Since updating to 4.7.6, I've experienced the following issues:
despite being connected to a bluetooth device, sound still comes out of phone speakers
static/distortion for a few minutes when initially connected to my car (2017 Chevy SS)
Upon connecting to car bluetooth, randomly the phone will call my phone number
I can usually fix these issues by either going into airplane mode for a minute or two or rebooting. Sometimes, I have to do this multiple times.
I've cleared cache but made no difference and I don't want to have to factory reset after every single update. Is it possible to flash factory images without nuking your data? You can do this with Google's Nexus/Pixel factory images.
I've got a different problem with 8.1 and BT audio. After upgrading to android 8.1, suddenly my car audio system doesn't receive songs data (artist, song, album). It's just display "no title".
Does anyone encountered similar issue?
raven6679 said:
I've got a different problem with 8.1 and BT audio. After upgrading to android 8.1, suddenly my car audio system doesn't receive songs data (artist, song, album). It's just display "no title".
Does anyone encountered similar issue?
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Click to collapse
Ugh, exact same issue. I don't suppose you're using a car with a UConnect system in it? Dodge, Jeep? All those crappy brands?
I am able to make phone calls just fine but I can't stream audio to save my f**king life. This happened right after the upgrade to 8.1 and latest update did nothing to fix this nor did it mention the issue. Has Oneplus even acknowledged the issue?
Im actually having the same exact issue, with Uconnect on a 2017 Chrysler 300s. Bluetooth skipping and sounds like crap. Have tried pretty much everything so far and no fixes
this what happen to me ...bluetooth to speaker klipsch ... sometimes got crack sound ...i mean wtf
Has anyone been able to figure this out? I'm still experiencing issues as well. OP5T and QC35.
I've been working OP support for almost 2 months via email and the cannot figure out how to fix this for be BT CALLS sound terrible,
I'm having problems with Bluetooth in a ford fiesta 2015. The phone is on 8.1.0 stock, no root. The device itself connects to the car perfectly, but fails to download the phone book, and says I loose signal when trying to make a call. The device registers that I've asked to call a certain person but nothing else happens afterwards.
I didn't have this problem on 5.0.4

Distorted audio output from the headphone jack?

hello, I recently bought my note 5 pro, and it's been almost 10 days, worked fine for a couple of days but now whenever there is a word starting with the letter 's' or something similar the audio gets really distorted and has a crackling effect, I've used different earphones, tried different auido/video files it still happens
sometimes it randomly fixes and I get normal music, but most of the time I still get the distorted sound, is this a hardware issue with the headphone jack or a software thing? I'm using the latest stable 9.5 miui update. (updated via OTA)
Same here...
shashanksetty said:
hello, I recently bought my note 5 pro, and it's been almost 10 days, worked fine for a couple of days but now whenever there is a word starting with the letter 's' or something similar the audio gets really distorted and has a crackling effect, I've used different earphones, tried different auido/video files it still happens
sometimes it randomly fixes and I get normal music, but most of the time I still get the distorted sound, is this a hardware issue with the headphone jack or a software thing? I'm using the latest stable 9.5 miui update. (updated via OTA)
Click to expand...
Click to collapse
Once 9.5.x came, this sound problem is here. There is distortion in the highs, and changing the enhancement head sharpens it too some extent but not everything. 9.2.x was perfect. And present 10.0.0.x is better but not completely resolved.
I believe its a software bug or incorrect tuning.
I had the same issue in MIUI.... After changing to lineage it was fixed.

Bluetooth issue

Hello, I'm having an issue with Mate SE's bluetooth quality. I will connect the phone to my jbl flip 3 bluetooth speaker and when music is playing, it skips, a lot. I have a bluetooth adapter in my car and when I connect my phone to that, it plays pretty well. Occasionally a skip, but bearable. Now you might say it's a problem with my speaker, when I was on EMUI 5.1 I used the phone with my speaker for an entire weekend out of town and didn't have any issues. The speaker also works fine with any of my other phones.
So it's specific to this phone, and the OS. I've tried lineage, xenonHD, and RROS, all the same problems.
I'm going to stock EMUI 8.0 to see if it persists. But perhaps this is a known issue or an issues someone has already had and can help me out.
Alright, so I'm back on EMUI8 and now the audio isn't skipping. But the audio is terrible quality. Anyone know how to fix this on custom roms?
Alright, so I'm back in RROS and was doing some trouble shooting with the bluetooth connectivity. I was messing with developer options to see if there was anything that could help, but nothing did. But I did notice something, I downloaded an app (A web browser) from the playstore and it made the skipping x100 worse while it was downloading and installing. Then it went back to average choppy.
might be something interfering with bluetooth. here i have good audio on bluetooth on custom roms, but it's a bit choppy from time to time. on emui, the issue goes away, audio is nice, no choppiness.
I've noticed degraded wifi speeds and latency when bluetooth is turned on.
Any test I did was without my WiFi turned on. It is something with the custom roms that cause the stutter with my bluetooth speaker. Hopefully it gets fixed as things get more stable.

Random loud screeching/white noise when bluetooth is on?

Recently, my phone's started to randomly shriek with white noise and it scares me silly. I think I've narrowed it down to when bluetooth is enabled and playing music (spotify).
Has anyone ever encountered this issue or could suggest what solutions I can try out? I've rebooted my phone and I don't want to immediately jump to a factory reset quite yet.
firstblud said:
Recently, my phone's started to randomly shriek with white noise and it scares me silly. I think I've narrowed it down to when bluetooth is enabled and playing music (spotify).
Has anyone ever encountered this issue or could suggest what solutions I can try out? I've rebooted my phone and I don't want to immediately jump to a factory reset quite yet.
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Click to collapse
I have an AT&T LG G8 running Android 10 (SW ver. G820UM20k.) I've also had this issue for some months now. However, while I have Spotify installed I am almost never using it; the noise occurs anyway.
My usage pattern when it occurs typically involves going between YouTube, Chrome, and Twitter apps, and occasionally other social media apps. Often happens when playing a video or audio in the background, but occasionally get the noise when dead silent in between apps too.
I've noted that if I stop what I'm doing when I hear it and immediately switch the audio path back to the phone (via the notification toggle,) the noise often occurs again but out of the phone speaker after a short time.
Now, I've not experienced any random noises the past couple of weeks, but haven't found a definite solution either. Searching the internet for "phone random static burst" or "phone making loud noise randomly" yields similar complaints going back the last few years, across different devices (and presumably Android versions.) Disabling/ force stopping Chrome was a more popular suggestion that came up, as well as fiddling with the Bluetooth codec in developer options. (I'd also suggest making sure all installed apps are updated, if the bug is indeed related to apps mishandling audio somehow.)
Given the range of system specs with these similar complaints, my hunch is the core issue may have to do with certain Bluetooth stack implementations just having problems in certain scenarios. FWIW I have my Bluetooth currently set to AVRCP 1.6 (Default is 1.4) and audio codec to SBC (Default is System Selection.) In months prior when I had the noise issue, these were set to default. My Bluetooth earbuds (Sony WF-1000XM3) prefer to default to AAC codec but do support SBC; I believe I haven't had the noise since forcing the system codec to be SBC only. If nothing else works, may be worth toggling that setting and hoping it fixes the noise. Good luck.

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