yashsingh1/xdaforums huggingface dataset:
[Xiaomi Mi A1 Questions & Answers] sujith440:
Guys please report this issue with the mi feedback application. Your feedback is very important and also please request others to do the same.
[Xiaomi Mi A1 Questions & Answers] sbejjankimobile:
Thanks for the reply. Today I went to service centre before I got your message. There the technician replaced the motherboard and tested...it's of no use. He said I have to change the earphone. Thanks for suggesting the Soundmagic E10C. Did MI have any list of supported/unsupported earphones?

Can you suggest some more earphones to buy?
[Xiaomi Mi A1 Questions & Answers] zamuz27:
I also have the Etymotic HF5 and I use this adapter:

https://penonaudio.com/3.5mm-impedance-adapter.html

The 75 Ohm is enough to get rid of the noise, and it will also noticeably improve sound clarity with the HF5. Win-win!
[Xiaomi Mi A1 Questions & Answers] _mysiak_:
I have 50 ohm and considering trying 175 ohm version as I'm really curious what difference it makes. Also I hope that they will start selling such adapters with full support of TRRS. iEmatch seems to be the only adapter with this feature, but unfortunately it's too expensive. Maybe if enough of us send a message to Penon audio, they will consider it.. (I already contacted them, though no response received) :)
[Xiaomi Mi A1 Questions & Answers] tazzes:
Thank you for you answer!

I'll try to find an impedance adapter like the one you suggested :)
[Xiaomi Mi A1 Questions & Answers] adfds:
Does completly remove hissing ie complete silence or just lowers hissing?
[Xiaomi Mi A1 Questions & Answers] sbejjankimobile:
I doubt :confused:Soundmagic E10C is rated at 46 Ohms. Can you share the link?
[Xiaomi Mi A1 Questions & Answers] invertedchicken:
Happy to hear that this works :)

Please be carfeul though! These adapters significantly increase the leverage on your headphone jack, so there is a higher risk of physical damage (e.g. in your pocket or backpack).
[Xiaomi Mi A1 Questions & Answers] chanx:
As far as i know MI doesn't have a list of supported/unsupported earphones officially. However you can start with E10C as the stepping stone.. If you want to upgrade, you can go for E50C or some other earphones with high impedance rating... Make sure it have atleast 40+ Ohms.. That should normally work.. If that doesn't may be there is some other problem with your piece.

---------- Post added at 05:59 PM ---------- Previous post was at 05:54 PM ----------

Here are couple of links.. Check the specifications section..

https://www.headphonezone.in/produc...v-lWbtam_1E5hgyKdCK6_6zJnjTkTaXwaAnZpEALw_wcB

https://www.stuff.tv/soundmagic/e10c/review

https://www.mobilefun.co.uk/soundmagic-e10c-in-ear-headphones-with-hands-free-gunmetal-56082
[Xiaomi Mi A1 Questions & Answers] zamuz27:
I also a have a 100 Ohm adapter and, aside from lowering the volume a little compared to the 75 Ohm adapter, I can't really hear a difference.

If you listen really carefully in a completely quiet room you can still hear a very, very faint noise. You won't notice it unless you're really trying to. The 100 Ohm adapter really does get rid of the noise but it's overkill in my opinion, and depending on your headphones it may force you to turn the volume way up.

These adapters have the added benefit of improving clarity in the higher frequency sounds for sensitive, low-impedance balanced armature earphones such as the Etymotic HF5 (I remember reading about this but I can't find the source right now, sorry), but they will also make your headphones quieter.
[Xiaomi Mi A1 Questions & Answers] Tubixak:
Has anyone tried Soundmagic ES18S ?

EDIT: Nah, I missed that they are 16Ohm.
[Xiaomi Mi A1 Questions & Answers] adfds:
whay headphone are you using> I assume the impedance of the headphone adds to the 100 ohm adapter
[Xiaomi Mi A1 Questions & Answers] sbejjankimobile:
Thanks :good:
[Xiaomi Mi A1 Questions & Answers] invertedchicken:
I just got the Ifi Ear Buddy today and the hissing sound is

gone

.

I am using the UE900 headphones, which are IEMs with 30 ohms impedance. The Ear Buddy has completely removed the hissing sound and the sound quality has improved significantly. I am very satisfied.
[Xiaomi Mi A1 Questions & Answers] SeniorWrangler:
I got my Soundmagic E50C today and the sound is great, without any hissing. Highly recommended!
[Xiaomi Mi A1 Questions & Answers] moliverac8:
Any cheaper option besides the 50C?
[Xiaomi Mi A1 Questions & Answers] SeniorWrangler:
E50S, E50, E10c, E10S and E10. That's if you're after impedance over 32 ohms and prices depend on the features they have. If you're in Europe it pays to have a look at the Soundmagic website for refurbishes pairs. Got mine quite a bit cheaper that way.
[Xiaomi Mi A1 Questions & Answers] rael75:
got E10c great sound not one slight of hiss
[Xiaomi Mi A1 Questions & Answers] Fredoslaw:
What about Soundmagic ES11S and ES19S? 46-49 Ohm, and much cheaper.
[Xiaomi Mi A1 Questions & Answers] SeniorWrangler:
Should be fine. It's the impedance that counts. I would pick the highest you can get within your budget.
[Xiaomi Mi A1 Questions & Answers] sitolupion:
I just ordered a unit to use with my Dunu 2000j, I like them too much to withstand the whistling ..
[Xiaomi Mi A1 Questions & Answers] soralz:
Just bought this for $3 for Mi A1, hissing noise is gone after using this. 3.5mm extension with volume control. The cons is extend your cord longer, mic and buttons on headphones doesn't work, unless you get the 4 pole one. Well it does the job and I don't complain. Now all my headphones are hiss free.
[Xiaomi Mi A1 Questions & Answers] sbejjankimobile:
Hey all,

I got a chance of refund on MI A1 mobile from flipkart. I was planning to buy a earphone E10c for this mobile but confused now...

Can you suggest whether to keep this mobile or buy some other. If so which one do you suggest? How is honor 7x? Are there any serious issues with that one?

How is one plus 5 or 5T?

Thanks.
[Xiaomi Mi A1 Questions & Answers] adfds:
From when does flipkart do refunds? they only do replacements
[Xiaomi Mi A1 Questions & Answers] sbejjankimobile:
Yes, I said I would reject the replacement if the problem is reproducible and requested for refund. As I visited service centre and sent the job sheet, they processed it. Lucky :o
[Xiaomi Mi A1 Questions & Answers] harshu0101:
Can you provide link for this?
[Xiaomi Mi A1 Questions & Answers] Fredoslaw:
https://www.aliexpress.com/item/3-5mm-Male-To-Female-3-Pole-Plug-Jack-Stereo-Audio-Aux-Cable-With-Volume-Control/32832778631.html
[Xiaomi Mi A1 Questions & Answers] moliverac8:
I don't know why you say that the Soundmagic e10c has 46 ohm. Everywhere I look says that the impedance is of 16 ohm
[Xiaomi Mi A1 Questions & Answers] SeniorWrangler:
http://www.hifiheadphones.co.uk/soundmagic-e10c-in-ear-isolating-earphones-with-mic-black-red.html

46Ohms
[Xiaomi Mi A1 Questions & Answers] HEIS3NBERG:
Just received my 75 Ohms adapter, work like a charm :victory::victory: finally I can listen properly to music
[Xiaomi Mi A1 Questions & Answers] _mysiak_:
I just wish they'll start offering 4 pole TRRS impedance adapters. iEMatch is damn too expensive, but I might bite the bullet eventually :\
[Xiaomi Mi A1 Questions & Answers] muhmuhmuhmah:
Yeah, I received mine, too.

Well, I maybe overdid it and ordered the 150 ohm adapter but the hissing really annoyed me. Sound is crystal clear now. I just try not to use it while I walk because the extra tension will destroy the port for sure.
[Xiaomi Mi A1 Questions & Answers] Fredoslaw:
I found impedance problematic with Soundmagic earphones. Today I have bought ES11S, in several online shops I checked, it was stated that impedance is 46 Ohm BUT!, it is really 16 Ohm (I noticed it at home, in specifications on the box). So, I have another hissing earphones in my collection (10+). I'm going crazy.
[Xiaomi Mi A1 Questions & Answers] seated_singer:
I too have this problem, it has been around a week while using this phone, tested it with flashing available kernels and custom ROM's and i can say this seems to be an hardware issue, out the box the device has hissing issue, not very annoying but surely audible when you use a high end headphones, for example it's less audible in my budget Sony MDR-XB75AP and more audible in my RHA - T20I IEM's, also used higher impedance headphones same result and is not effected by ARISE sound enhancements which i regularly in my other devices.
[Xiaomi Mi A1 Questions & Answers] HEIS3NBERG:
Not even 24h after it is already broken...

I'm not the most gentle man but still, don't recommend it.
[Xiaomi Mi A1 Questions & Answers] SeniorWrangler:
My E50c is 51 ohm, as stated in the specifications and on the box. The E10c are rated 46 ohms in all reviews, so I would say you're fine with either of those. They are more expensive than the es11s, though.
[Xiaomi Mi A1 Questions & Answers] moliverac8:
Bought the soundmagic e10c. In the box says 46 ohms. The audio is the same **** as always, the audio of this phone is horrible, the worst I have ever had.
[Xiaomi Mi A1 Questions & Answers] Tubixak:
Man, I feel for you.
[Xiaomi Mi A1 Questions & Answers] sitolupion:
EarBuddy does not have that problem .

yes, it's more expensive, but the quality is excellent.
[Xiaomi Mi A1 Questions & Answers] Tubixak:
Where can I buy it?
[Xiaomi Mi A1 Questions & Answers] airidosas252:
There was a hissing sound, but somehow it vanished. Been listening some music lately and it was a total joy!
[Xiaomi Mi A1 Questions & Answers] sitolupion:
https://www.amazon.com/Ear-Buddy-Headphone-Optimizer-Travel/dp/B075PVVHF5
[Xiaomi Mi A1 Questions & Answers] tuxonhtc:
Might be the Oreo update? I don't have this issue either, post Oreo update.
[Xiaomi Mi A1 Questions & Answers] ludditefornow:
Looking at the mixer_paths_mpt.xml file in system\etc I came across this code.

<path name="speaker">
<ctl name=[B]"Boost Output Voltage" value="8.5V"[/B] />
<ctl name="Left Feedback Enable" value="ON" />
<!--
<ctl name="DRE EN" value="1" />
<ctl name="Ramp Switch" value="0" />
<ctl name="Amp DSP Enable" value="1" />
<ctl name="Amp Volume Location" value="0" />
-->
<ctl name="Speaker Volume" value="5" />
<ctl name="Digital Gain" value="56" />
<ctl name="Left Channel Enable" value="1" />

This might affect people with hissing noise. Also, if the amp is 10 volt, why is the output set to 8.5 volts? Is this worth investigating for someone with root?

I have attached a copy of the file as a .txt. Just change it to .xml. This files is from the second december update of Nougat.
[Xiaomi Mi A1 Questions & Answers] EveHo:
Did you try to change config?
[Xiaomi Mi A1 Questions & Answers] moliverac8:
I'm in January Oreo update and mine says 8,5V too. But there is another Voltage parameter that says 6,5 V
[Xiaomi Mi A1 Questions & Answers] Ver0s:
So theoretically it is possible to get rid of the hissing noise via custom kernel or custom ROM? Guess we have to wait, but I hope it'll be fixed any time soon.
[Xiaomi Mi A1 Questions & Answers] The_Scrub:
It's extremely weird that this is the biggest problem of the phone and that they haven't fixed it yet(Im on January 1 oreo patch). Makes me think that its a bad hardware problem and cant be solved so i pretty much got scammed could have gotten nubia m2 for cheaper...
[Xiaomi Mi A1 Questions & Answers] moliverac8:
What is usually the standard output voltage?
[Xiaomi Mi A1 Questions & Answers] _mysiak_:
Thanks for sharing, but this one seems to be config of loud speaker only, so most probably won't help with headphones hissing.
[Xiaomi Mi A1 Questions & Answers] ludditefornow:
I wasn't sure but around line 1278 there is this entry about headphone and speakers.

[B]<path name="speaker-and-headphones">[/B]
<path name="speaker" />
<ctl name="RX3 Digital Volume" value="84" />
<path name="headphones" />
</path>

<path name="wsa-speaker-and-headphones">
<path name="wsa-speaker" />
<path name="headphones" />
</path>

<path name="usb-headphones">
</path>

<path name="afe-proxy">
</path>

<path name="transmission-fm">
</path>

<path name="speaker-and-usb-headphones">
<path name="speaker" />
<path name="usb-headphones" />

I see there is a separate entry for usb headphones and speakers, too.
[Xiaomi Mi A1 Questions & Answers] _mysiak_:
I remember that I tried to modify volume or gain values for headphones in mixer file, but even when set to "1", it didn't do any change. Volume and hissing was still the same. I was trying it on Nougat, but Oreo is probably the same. However Oreo has less hissing compared to Nougat, so maybe they'll get it right in one of the next updates :)
[Xiaomi Mi A1 Questions & Answers] ludditefornow:
Thanks for the feedback, I have just been looking for as many system files as I can find with reference to sound and slowly working through them.. There seesm to be a lot of redundant code in these files!
[Xiaomi Mi A1 Questions & Answers] plusoneeye:
A new solution method?

Hi everyone!

New guy here. I got my MI A1 two days ago. The static/hissing noise is annoying for sure. So I googled it, and found this forum.

I have a JVC HA-RX700 headphone (48 ohms), and still have the noise, so I'm not sure it's an impedance thing. I found a similar problem with Samsung phones on a forum. (Can't link it, first post here.)

Here, a user named "karmlol" wrote an interesting thing in 2015:

"The clue was in the jack plugs for the samsung standard earplugs (which produce no static), compared to that of my own headphones (which do produce static). The samsung standard earplugs jack plug has three plastic rings on it. My own headphone only has two. Some research showed that the three-ring plug is called a "4 pole jack plug": it has another pole to be able to transmit microphone audio. My own headphones only have 3 poles, so the galaxy's microphone receiver pole actually outputs as static into my headphone. To resolve this, I bought an 8$ adapter called "3.5mm Jack Headphone Microphone Splitter". Plugged it into my phone, plugged my headphones into the audio part of the splitter, and I've got sound without static. Yay!"

All the earphones/headphones of mine have two rings, so I can't test this. It would explain that some earphones have no problem and some have the noise. Maybe it does not matter if you have high impedance headphones, but it would be a cheap solution to have for others (like me), to simply buy a cheaper earphone with three rings on the jack plug.

Can anyone test this theory, and test a 2 ring and a 3 ring jack regarding the noise?
[Xiaomi Mi A1 Questions & Answers] arvind7955:
Mine has 3 rings. Hissing sound is unbearable on volume level 1-3 and I listen on a very low volume.

I don't have audio splitter so I can't test rest of the theory.
[Xiaomi Mi A1 Questions & Answers] plusoneeye:
Thank you for testing it.
[Xiaomi Mi A1 Questions & Answers] _mysiak_:
Number of rings/poles has absolutely no impact on the hissing noise. Tennmak Pro have removable cables and they hiss exactly the same with or without a mic. Impedance adapter removes the hissing.
[Xiaomi Mi A1 Questions & Answers] plusoneeye:
Thank you for the information.
[Xiaomi Mi A1 Questions & Answers] soralz:
https://xdaforums.com/showpost.php?p=75184453&postcount=250

You can try this extension, it solves the hissing sound by lowering the physical volume control (increase impedance). But you need to raise up volume output on your phone in order to make the volume louder.
[Xiaomi Mi A1 Questions & Answers] the mi A1 guy:
I also have the same problem, but only with low volume,more precisely when I stop the music(but after 1 sec it stops) or when someone in the video is wishpering(that's when I discovered the issue).

And don't think that the mi a1 has a poor audio, it's amazing and one of the reasons to buy it. ; )

Mine is the global version (mi a1 black 4gb/64gb)
[Xiaomi Mi A1 Questions & Answers] ajegile:
have try type-c earphone ?

for me hissing ,no.
[Xiaomi Mi A1 Questions & Answers] yashagarwal1999:
Your headphones are the problem. They probably have a low signal to noise ratio. The phone's audio is great!
[Xiaomi Mi A1 Questions & Answers] :
Got my A1 two days ago and reporting about the hissing.

I do not experience and kind of hissing or sputtering noise any issue with headphones/earbuds.

There was a post about the 3.5 mm connector which said that if it had 3 black rings then we don't experience the hiss and I can confirm that.

All my headphones have 3 black rings on the connector (basically that means that the headset has a mic) and experience no problem.

I borrowed my friends CX180 street II (which does not have a mic) and i could hear the hiss.

So yeah, headphones with mic will give you no problems.

Note: The headphones get so loud damn, the dac really flexes its muscles. The headphone setting built in the software is like cherry on top. I am waiting for their pro HD in ears to get added to this settings so i could fully enjoy the new pro hd headphones. Love the sound quality.
[Xiaomi Mi A1 Questions & Answers] arvind7955:
Mine has mic but hissing is so bad. I only listen at volume level 2 or 3. Hissing is ruining everything.
[Xiaomi Mi A1 Questions & Answers] :
Sorry to rub it in your face but yeah both my friend and I seem to be lucky with the audio issue.

I did test every headset i could borrow and i have been lurking this thread even before i ordered my A1, i was kinda upset since I love listening to music, i am not an audiophile though but I can really make out some differences. Or may be i simply can't hear those frequencies :silly:

Sorry to hear about the issue.

Can people file a suit against Xiaomi for this issue like when people did with LG for Nexus 5X bootloops and some devices?

Has Xiaomi recognised this issue or given some statement about it?
[Xiaomi Mi A1 Questions & Answers] aditya104:
Any custom roms which is able to fix this first will become instant hit.
[Xiaomi Mi A1 Questions & Answers] Mr.Oscar:
me too, it's really horrible

http://en.miui.com/thread-950748-1-1.html
[Xiaomi Mi A1 Questions & Answers] LouisMuruu:
In my opinion, it's not a software issue. Have to read up on resistance and the basic physics behind it.

Basically, higher impedence earphones will have no hissing sounds and I've tested it on some of my earphones .

16 ohm JBL C100SI - Hissing present (obvious)

32 ohm Xiaomi Piston HD - Hissing present (little)

40+ ohm Apple Earpods - Hissing present (very little)

64 ohm VE Monk + - Totally no hissing

Hope this helps! :angel:
[Xiaomi Mi A1 Questions & Answers] peterpetersen:
Hey,

I guess someone mentioned it already: With an impediance adapter you can remove the hissing even for low impediance headphones. I bought the EarBuddy and the hissing is almost completly gone.

Here is a good list:

https://xdaforums.com/mi-a1/help/impedance-adapter-headphone-hissing-t3733213
[Xiaomi Mi A1 Questions & Answers] robgee789:
Guys it is because of the DAC my shield K1 does it too and that also has DAC I don't see the big issue here you can only hear it for a second when the sound stops
[Xiaomi Mi A1 Questions & Answers] moliverac8:
You can hear while you play a video or listen to music. I have the shield k1 and happens the same, but the hissing is quieter.
[Xiaomi Mi A1 Questions & Answers] cnqrr:
I think it depends upon the headphones you are using. Low quality earphones tend to produce these sounds when connected to devices with optimized DAC.
[Xiaomi Mi A1 Questions & Answers] adfds:
all devices you can connect an earphone to has a DAC dumbass
[Xiaomi Mi A1 Questions & Answers] cnqrr:
Lol im sorry for that misleading comment. Im referring to amps that are meant to drive high impedance headphones.
[Xiaomi Mi A1 Questions & Answers] Warft:
Finally, after much searching, I found in-ear headphone that do not have this problem. Curiously, they are unmarked Chinese who came with a pack of accessories for the Nintendo DS.

I can only say that they have a label with the following number L0T01215T0301, and searching it through google does not yield any results. :(

This is a pic of it
[Xiaomi Mi A1 Questions & Answers] Tiddy22:
Just got Soundmagic E50S and all I can say is that the hissing IS STILL HERE, they have 51 Ohm impedance and I can still hear the hissing, it's unbelievable. What can I do? Are there any better earphones that I can buy?
[Xiaomi Mi A1 Questions & Answers] SeniorWrangler:
I have the E50C and no hissing issues whatsoever...
[Xiaomi Mi A1 Questions & Answers] LouisMuruu:
VE Monk plus doesn't give any hissings. It's 64 ohms.
[Xiaomi Mi A1 Questions & Answers] ludditefornow:
Well I just updated to the Feb release of Oreo and with no other fixes other than turning on the option for "MI Sound Enhancer" for using speakers and choosing "general" headphones in Settings > Sound > Headphones and Audio Effects I have no noticeable hiss with my the standard white samsung in ear jobs from an A series phone (unknown ohm rating).

Sony over ear sport headphones (16 ohm) still have some hiss.

Both of these headphones has noticeable hiss on all versions of Nougat I tried.

I do notice that the samsung headphone plug only has three white rings but does have a mic, which I use regularly. My Sony over ear headphones do not have a mic.
[Xiaomi Mi A1 Questions & Answers] moliverac8:
Some people are saying that the hissing is gone in March ota. I'm rooted and with TWRP in January ota with the mod sound so I can't confirm

Enviado desde mi Mi A1 mediante Tapatalk
[Xiaomi Mi A1 Questions & Answers] _mysiak_:
Nothing is gone, hissing is still roughly the same :)
[Xiaomi Mi A1 Questions & Answers] scoobygram:
Confirm. Hissing here.
[Xiaomi Mi A1 Questions & Answers] kutulu32:
Just bought the phone today, i didnt upgrade to oreo yet with my sennheiser ie8 no hissing although they are 16ohm.

One question all the dirac hd tweaking and headphone settings are in oreo ?because in nougat i cant find anything in sound menu. Audio quality using usb audio player pro (hires driver) is very good though.
[Xiaomi Mi A1 Questions & Answers] pooniaprashant:
There's nothing changed in terms of sound quality compared to nougat, you can upgrade. Issues like hissing are present in Oreo but if you aren't noticing then in nougat then you won't notice them in Oreo too. Also, there's only one area in this phone to tweak sound quality, that's in sound section in settings, it's the same in both Oreo and nougat.

---------- Post added at 03:04 AM ---------- Previous post was at 02:39 AM ----------

With all my observations with different earphones I have concluded that every earphones (with/without mic) under 16ohm impedance will output easily noticeable hissing.

And the only case when you won't be able to hear hissing in 16ohm or lower impedance earphones is when your earphones frequency response is not good, means either they are OEM earphones, or they aren't able to capture very low frequencies.

So it's better to buy a cheap Chinese earphone of unknown brand that has atleast 32ohms impedance than to buy a reputable and recommend earphone by brands that are household names (Sony/rha/vmoda) today, as they will show you the quality of this 3.5mm jack as clear as water.

Note: this doesn't mean that 32ohm are 100% safe to buy, the only earphones that I can blindly say will show no hisses would be of 60+ impedance, and GOOD quality earphones of that impedance easily costs more than this phone itself. So the only practical choice for someone who bought this phone or is considering to buy one is to apply the hit and trial method, and before starting ordering earphones online like everyone else is used to in 2018, make sure that if it won't satisfy you, "it's your fault".
[Xiaomi Mi A1 Questions & Answers] gplsource:
I just bought the xiaomi mi piston fresh edition earbuds, no more hissing sound for 5 bucks.
[Xiaomi Mi A1 Questions & Answers] kutulu32:
I don't have any tweaking menu in sound settings
[Xiaomi Mi A1 Questions & Answers] pooniaprashant:
its there, i haven't used nougat much so i am not sure where it is, search "headphones & audio effects" in settings. Also there's an equalizer in google play music settings too. Personally i just select the desired audio profile and tweak equalizer that's included in poweramp as i don't use g play music.