yashsingh1/xdaforums huggingface dataset:
[Xiaomi Mi A1 Questions & Answers] berezker:
I have JVC HAFX40 earbuds rated at 16 ohms and a noticeable hiss is definitely heard

But i did find a workaround that decreases hiss by at least 70%

All you have to do is mess with the equalizer, Increase the bass and reduce treble

The heavy bass will drown all the noises and the hiss will pretty much disappear

I've only tested this with HipHop and R&B music

Your mileage my vary as these music genres are naturally bass heavy
[Xiaomi Mi A1 Questions & Answers] kutulu32:
I upgraded to oreo i found the menu for headphone tweaking all the profiles are useless for my headphones (sennheiser ie8 and hd600). No hiss with ie8 . The amp is still powerful but i wished it were a line out choise too to connect external amp. Audio quality is slightly worse than in nougat even with headphone settings disabled.
[Xiaomi Mi A1 Questions & Answers] Rubytux:
I had that white noise in all of my three earphones/headphones, but i solved it by disabling "touch tones".

Settings > Sound > Advanced > Touch Tones.

Now the white noise is gone
[Xiaomi Mi A1 Questions & Answers] pooniaprashant:
Touch tones just disable sound while touches, so when there's no audio, there will be no hissing, hissing starts a sec before any audio activity. So yes, disabling it reduces the frequency of hissing, but it isn't a "fix".
[Xiaomi Mi A1 Questions & Answers] ppkpt:
I'd like to contribute a bit by saying that the sennheiser cx55 hissses like crazy and apple in ear headphones (2nd gen) hiss a LOT less.

with the bluetooth air pods and sony wh-1000xm2 the issue is not present (probably because these use their own amps instead of the 10v amp in the phone).

despite this issue I still cannot recommend this phone enough to everyone i come across. great FVM
[Xiaomi Mi A1 Questions & Answers] BetaPix:
Is there a chance the hissing issue will still be present even if I buy any bluetooth earbuds?
[Xiaomi Mi A1 Questions & Answers] ppkpt:
I believe that will depend on the bluetooth earbuds.

If they're good earbuds you should be ok.

Meanwhile I've also tried the Sony WF-1000X in ear bluetooth, for music they work perfectly, no noticeable hiss. For video, there is a big delay between video and sound, they're worthless.

Might as well say that the noise canceling feature of these Sony WF-1000X is also worthless (firmware 1.0.7).
[Xiaomi Mi A1 Questions & Answers] moliverac8:
So I bought them and I don't have audio output with them. April oreo

Enviado desde mi Mi A1 mediante Tapatalk
[Xiaomi Mi A1 Questions & Answers] karghya:
Awesome Sound Quality over the 3.5 mm headphone socket

Awesome Sound Quality, negligible hiss rather no such noticeable hiss, got the best output from Philips SHE3205 (32 ohms impedance) also with Bose SoundSport in-ear wired (44+ ohms impedance), it's just incredible... and the preset to choose - mi in-ear pro, don't know why the manufacturer renamed the genre to the headphone models.
[Xiaomi Mi A1 Questions & Answers] rev.ir:
My experiences witch headphone hissing sound on Mi A1:

Sony ACTIVE MDR-AS410AP = bad

Samsung EHS-61 = ok
[Xiaomi Mi A1 Questions & Answers] AndroGeek911:
problem with cheap headphone and now mi have lowered the volume in name of fix.

Truely speaking i have never faced hissing sound with my pair of headphones with cheap earphones i do notice but due to lots of complain i guess xiaomi had so called "FIXED" the problem by "LOWERING THE VOLUME". Really pissed with xiaomi for doing this. The sound quality and loudness we MI A1 used to boast is not with us anymore. Hope they fix volume and make it as it was before in next update.
[Xiaomi Mi A1 Questions & Answers] Enea29:
Also tested with Kotion Each G9000 (32 ohms), no hissing, tested in a very silent room.

Tested also the JBL JBLT205BLK (16 ohms), terrible hissing.
[Xiaomi Mi A1 Questions & Answers] pragunjain:
I didn't notice this hissing problem with my Mi in ear pro earphones but when I upgraded to RHA ma390u I came across this issue and thought that something was wrong with my earphones but after searching a bit I realized it's a problem with every mia1 device. I am running Oreo 8.1 and there is no official fix released till now
[Xiaomi Mi A1 Questions & Answers] sitolupion:
For the volume problem I use Equalizer FX, there is an option to increase the gain. If you do not want to modify the sound, set the equalizer settings to 0 on all frequencies and only increase the gain.
[Xiaomi Mi A1 Questions & Answers] Amaankhan97:
Is this Phone issue or headphones?I am facing this right now in my jblc100si headphones.
[Xiaomi Mi A1 Questions & Answers] JakobSWE:
Phone, but some headphones sounds better that others.
[Xiaomi Mi A1 Questions & Answers] :
It's normal that you are facing this.

Their impedance is 16 ohms. Look for ones with higher impedance (you can even find cheap ones, like the VE Monk Plus which have an impedance of 64 ohms) and it will be fine.
[Xiaomi Mi A1 Questions & Answers] Amaankhan97:
But this problem occurred after 3-4 days of usage.Earlier it was not there.
[Xiaomi Mi A1 Questions & Answers] marko.dnb:
I own 2 KZ's (ZS3 and ZSR) ZS3 has very low hiss noise, while ZSR are sounding perfectly fine. If you're facing hissing, instead of buying new headphones you can alternatively buy cable adapter which will increase impedance, there are plenty on aliexpress, you can even build it by yourself

Here's one for example: https://www.aliexpress.com/item/DUN...276f-4460-91d1-5c281cd0bcdf&priceBeautifyAB=0

---------- Post added at 04:04 PM ---------- Previous post was at 04:03 PM ----------

Try to clean 3.5mm port with some Q-tips, but watch not to get cotton part stuck in there
[Xiaomi Mi A1 Questions & Answers] andrewjch28:
I have Sony IER H500A (and of course the Mi A1) which has 16 Ohm impedance. Is it compatible with the Ear Buddy? I paid a fair bit for the earphones and would like to use it still as its fantastic but the hissing is terrible. Thanks so much.
[Xiaomi Mi A1 Questions & Answers] headphonesay:
You can refer to Sennheiser HD598 headphones. According to the comments of many users, genuine Sennheiser HD598 headphones have a fairly balanced, clear sound quality with high sound detail and authenticity. It is not an exaggeration to say that the HD598 has very close characteristics to other high-end Sennheiser products. The wide, airy soundstage has the ability to reproduce good space, and listeners can easily feel the reproduced tones in detail, sweetness, and flexibility, especially in the low range.
[Xiaomi Mi A1 Questions & Answers] Makismbt:
Bought a mi 11 with 12.5.7 firmware and this hissing is driving me INSANE. Listening to podcasts is just frustrating. Present with Sennheiser IE 4,huawei freebuds 3. Need to try with my akg k702 which are 62ohm but can't really use them outdoors. Goddamn I love these little Sennheiser, I've had them for ages and am so used to their sound.

Update: AKG K702 still hissing.... Used with the included usb-c to jack adapter.
[Xiaomi Mi A1 Questions & Answers] Makismbt:
Also tried a pair of xiaomi noise cancelling type c buds and the hissing might even be worst.... 32ohms.

Is there any alternative to the ifi earbuddy? Can't find it easily
[Xiaomi Mi A1 Questions & Answers] Hello963:
I'm facing the same issue with my phone

I used several headphones and the all gave the static sound. it doesn't go away even when am not touching the phone.

Though, I tried hyper x cloud 2 and it seems not noticable with them

Is it a software issue or hardware ?
[Xiaomi Mi A1 Questions & Answers] n0bbi82:
Same Problem here. I think its a Software issue, because i have the same Problem with Headset and Speaker.

Gesendet von meinem Mi A1 mit Tapatalk
[Xiaomi Mi A1 Questions & Answers] Alex2017Germany:
I think it is no issue. Normal Phones have an output of 2V at the headphone jack. The Mi A1 10V. So you can usw bigger headphones which needs more performance.

With bigger headphones i think you will not hear the hissing sound (Can not try because i havent the phone). Maybe In Ears with an impedance of more than 32Ohm can solve the "issue".
[Xiaomi Mi A1 Questions & Answers] zazzy24:
I am having an entirely different issue altogether. I tried pausing the audio and listening but i get no hissing sound with the 3-4 headphones i have tried. But on my phone the music suddenly stops for a second or two and then resumes like it does for a notification, except there is no new notification. This issue is present when i use bluetooth speaker as well, is quite frequent and totally ruins my music experience :(
[Xiaomi Mi A1 Questions & Answers] sale 83:
Didn't notice hissing souns through my ath m40x, I am using player pro..phone isn't my primary music player though, I use it only as a backup when my portabe music player dies.
[Xiaomi Mi A1 Questions & Answers] Ver0s:
So in theory this issue can be fixed by a software update? Im just wondering because i also hear this noise but its not that big of a deal for me. Would be nice od it was fixed by a software update.
[Xiaomi Mi A1 Questions & Answers] bravovn:
When i plug LG quadbeat3, sound was noise and it auto recognizes volume button without press buttons on earphone, very annoying.

Try with earbud iphone, everything works fine.

Feel little disapoint with mia1 with screen and headjack
[Xiaomi Mi A1 Questions & Answers] RebellionRahul:
Hissing sound due to impedance value of headphones

Use headphones with impedance value higher than 32 ohms. It will solve your problem.
[Xiaomi Mi A1 Questions & Answers] soralz:
I bought Mi A1 2 days ago. I think if you need to use earphones, you best to get their official ones. I bought In Ear Pro HD together with the phone. Although you still can hear the sound of the sound server being started and stopped, it doesn't produce any hissing sound as far I can tell. I tried my Sony earphones and it performed very bad, terrible hissing sound. Although the In Ear Pro HD is kinda at the cheap side, I felt it very well built with aluminium design, the sound quality is great too.
[Xiaomi Mi A1 Questions & Answers] Ver0s:
I honestly think that this issue is going to be fixed in future update considering the fact that how many complains about this issue are out there on the internet. I hope that it is possibile to fix this issue by a software update. I will wait until Oreo update for them to fix it. If not i will buy new headphones with higher imedence.
[Xiaomi Mi A1 Questions & Answers] sale 83:
What player do you use when you have that hissing sound?

I am using PlayerPro.I just tested it with my cheap scullcandy jib 2, akg k77 and ath m40x...no hissing.
[Xiaomi Mi A1 Questions & Answers] amithiel:
Every player. Every app. YouTube, spotify, Headspace (the meditation app) etc. Everything that makes a sound
[Xiaomi Mi A1 Questions & Answers] jai krishna:
i'm also getting the hissing sound when i touch the screen when not hearing music
[Xiaomi Mi A1 Questions & Answers] Jerryxl:
I think it's due to the dedicated amplifier.... When using high impedance headphones there is no hissing noise....i have an audio technica ATH M50X(38 ohms) it sounds awesome. No hissing noise.....my previous phone (moto g3) didn't had enough power to reach the higher volumes on this headphone. But when using this phone the audio quality is incredible... But when using my low impedance sennheiser cx180 (16 ohms) the hissing noise is present, but still the audio quality is very good... You won't hear any hissing noise while audio is playing....You can only hear it when you stop playing any sound and after 1 or 2 second the noise too will stop.It's just like in a laptop or desktop.... You can hear the same hissing noise on cheap headphones when connected to a computer headphones jack because of the dedicated amplifier..... Use any headphones with impedance greater than 25ohms. i tested this phone with my friend's sony MDR zx110A which is having an impedance of 24ohms and no problem at all(its a cheap headphone around 700₹ or 10$)....
[Xiaomi Mi A1 Questions & Answers] kdng:
So is this a bug that can be fixed with a software update? I know the amplifier is the problem, but wouldn't it be nice if this got fixed without having to turn the amplifier off?
[Xiaomi Mi A1 Questions & Answers] _mysiak_:
I am experiencing the very same issue with Nexus 5x and it is possible to solve it easily with custom kernel (ex kernel) and decreasing the audio gain for headphones. Then I'm able to use sensitive low impedance headphones with no hissing whatsoever. I don't think that Xiaomi will solve it in any way, but once they release kernel sources, some developer can build an advanced kernel with this handy feature.
[Xiaomi Mi A1 Questions & Answers] mrchrister:
Never experienced hissing on this phone. I use 1more triple driver in ear plugs (32 ohm)
[Xiaomi Mi A1 Questions & Answers] nfsmayank:
I did see the phonegyaan video of Mi A1 1 month review and he said about this thing...I don't remember it perfectly but he said it can't be fixed by software update. You need better headphones with it. See the video on YouTube.
[Xiaomi Mi A1 Questions & Answers] moliverac8:
Has anyone tried using wireless headphones? Can you hear the static/hissing with them?

Enviado desde mi Mi A1 mediante Tapatalk

---------- Post added at 08:28 PM ---------- Previous post was at 08:27 PM ----------
[Xiaomi Mi A1 Questions & Answers] amithiel:
I have Bluetooth ones from JBL. Still the same hissing
[Xiaomi Mi A1 Questions & Answers] moliverac8:
If the problem is low impedance, why is the noise there when using wireless headphones? I don't get it.

Enviado desde mi Mi A1 mediante Tapatalk
[Xiaomi Mi A1 Questions & Answers] gougous3:
Wait, the noise persists when using wireless headphones !? Can anyone verify this ?
[Xiaomi Mi A1 Questions & Answers] amithiel:
Yep. It has to be software related. The equalizer right? Maybe someone can figure out how to lower the amplifier or something like that
[Xiaomi Mi A1 Questions & Answers] gougous3:
[MENTION=4332874]amithiel[/MENTION] The amplifier works on the jack output of the device only, where's your common engineering sense ? (just kidding, no offense lol)

This is good news though, probably means that it isn't an hardware design issue but something that can be fixed with an update. Again, probably.

EDIT: Just remembered, it can be an hardware flaw that leads to a software issue but that's very unlikely..
[Xiaomi Mi A1 Questions & Answers] Ver0s:
Let's just hope that they'll fix this issue in upcoming updates. I have a really strong feeling that it can be fixed by a software update, so only thing we can do for now is just wait
[Xiaomi Mi A1 Questions & Answers] jack_21:
I need to disable the volume control of the headphones, because sometimes (not always) the volume will increase and decrease while i'm not pressing anything! I'm going crazy. The headphones may have some problem, but with other phones the volume doesn't change!
[Xiaomi Mi A1 Questions & Answers] moliverac8:
Has someone tried with Ath-MSR7?

Enviado desde mi Mi A1 mediante Tapatalk
[Xiaomi Mi A1 Questions & Answers] NITRO_100:
I have also JBL Bluetooth headphones (E40BT) and absolutely no hissing sound. In fact the sound is the best that I felt out a box from mobile phone without any kind of sound modifying app.
[Xiaomi Mi A1 Questions & Answers] jeneb11:
the hissing noise seems to be a hardware issue :( people have said that they are facing with good impedance headphone too
[Xiaomi Mi A1 Questions & Answers] Ver0s:
But also some people said that this issue is also present on some Bluetooth headphones so it might as well be a software issue. Let's wait for November update and hope for a fix.
[Xiaomi Mi A1 Questions & Answers] bravovn:
Im facing same problem. Looklike it is a hardware issue of some device not all.

My solution is change headphone without mic or just only skip button. Avoid using headphone within volume button.
[Xiaomi Mi A1 Questions & Answers] pow01:
I am also facing this issue and have started a thread https://xdaforums.com/mi-a1/help/xiaomi-mi-a1-volume-issue-connected-t3701441/post74432215#post74432215

Have you tried different headphones in your handset and did the problem remain with the other headphones?

---------- Post added at 07:46 AM ---------- Previous post was at 07:41 AM ----------

Hi

I have started a thread regarding this issue https://xdaforums.com/mi-a1/help/xiaomi-mi-a1-volume-issue-connected-t3701441/post74432215#post74432215

My headphones have an inbuilt mic but no volume control. Have you tried alternative headphones in your device?
[Xiaomi Mi A1 Questions & Answers] pkrajpur:
recently brought sony MDR ZX 110 A(28ohms), happy no hissing found.suffered a lot in soundmagic earphones(16ohms)
[Xiaomi Mi A1 Questions & Answers] _mysiak_:
My experience, from worst to best:

Extremely annoying hissing - Tennmak Pro Dual (16ohm / 100db)

Annoying hissing - Etymotic Research HF5 (16ohm / 105db)

Annoying hissing - Urbanfun HiFi (20ohm / 108db)

Very slightly less annoying hissing - Senfer UES (16ohm / 112db)

Absolutely no hissing - Beyerdynamic DT 990 pro (250ohm)

However, after using 50ohm impedance adaptor, I can't detect any hissing whatsoever with any of my IEMs. Unfortunately it doesn't work with TRRS headphone connectors (those with mic), so need to look for new high impedance IEMs or TRRS impedance adaptor. In each case, there is a workaround available, so we don't have to suffer anymore :)
[Xiaomi Mi A1 Questions & Answers] moliverac8:
Hissing sound using Ath-MSR7, is Xiaomi going to say anything about this? It's a shame and they promote their audio as something special. *facepalm

Enviado desde mi Mi A1 mediante Tapatalk
[Xiaomi Mi A1 Questions & Answers] :
Me too I have this problem with my Mi A1.
[Xiaomi Mi A1 Questions & Answers] moliverac8:
Has anyone tried plugging the headphones through the Usb-C port? I don't wanna buy an adapter for nothing.

Enviado desde mi Mi A1 mediante Tapatalk
[Xiaomi Mi A1 Questions & Answers] muhmuhmuhmah:
Guys, try getting Rocket Player (or any other music player with a 10-band equalizer actually) and play a bit with the settings. I've had some success with lowering the hiss on some of my earphones.
[Xiaomi Mi A1 Questions & Answers] Gtxinsane:
I got the new Xiaomi Type-C ANC Headphones their amazing!
[Xiaomi Mi A1 Questions & Answers] chrone:
The Google Pixel 2 USB C audio dongle gets rid of the hissing sound as well.
[Xiaomi Mi A1 Questions & Answers] sitolupion:
same problem here, the phone arrived yesterday...

with iems Dunu (8Oh) there are hiss, but it is not so annoying for me either, when the music plays, it disappears. if the music does not sound, after 2 seconds it turns off.

with Meze 99 C (32Oh) there are also hiss, but to a lesser extent.

with my AKG 712 (62Oh) there are no hiss and they sound fantastic. this, before the A1, I only got it with dedicated amplifiers.

I do not know if the problem can be solved with an update, but what is certain is that for me, the DAP is over.
[Xiaomi Mi A1 Questions & Answers] tinyXperia:
I'm using Xiaomi Piston v2 Youth earphones and sound quality is great, no hissing. I haven't tried other earphones yet.
[Xiaomi Mi A1 Questions & Answers] fazloon88:
The hissing sound because the amp. It's just for couple of seconds before you play something. And when you play it's amazing
[Xiaomi Mi A1 Questions & Answers] ludditefornow:
For me, the hissing starts after I plug in the headphones. if I do nothing at all to the phone, the hiss lasts about 3500 milliseconds then times out and stops. If I touch the screen or any button, it starts again and continues for about 3500 milliseconds after last last input to the phone from screen touch or button. When I play audio through the headphone the hiss is constant.

I believe it is software related. If anyone can access the rom code, I would do a search for anything relating to 3000ms and 3500ms and work from there.
[Xiaomi Mi A1 Questions & Answers] _mysiak_:
In other words, it is audible whenever a sound is played. It should be possible to solve by lowering the audio gain with custom kernel. Keep the gain low for low impedance headphones and at the default value for high impedance ones. Not sure that it can be fully automatic though, probably will require manual action.
[Xiaomi Mi A1 Questions & Answers] ludditefornow:
Possibly, however this happens whenever an input is registered. I don't get a sound when I register a click on the power button when the phone is already on so it may not be sound driven. That is why I said what I said. It could also still be hardware based. I don't want to assume anything in case my confirmation bias and lack of intimate understanding distorts the facts for someone who has the skills to actually nail down the issue in code.

It might sound pedantic, but I'll just offer the facts to assist the programmer in finding the reason.
[Xiaomi Mi A1 Questions & Answers] melonfresh:
Audio Technica IM-70 IEMs here. Very annoying hissing going on. Very disappointed considering the hype from some areas about the "high quality" output. Very very noticeable when I listen to classical tracks, especially coming from my Galaxy S3 with Wolfson DAC...
[Xiaomi Mi A1 Questions & Answers] _mysiak_:
I just wanted to say, that what you described is fully in line with what has been observed. Disable touch sounds in settings and hissing will stop with screen input. It is standard behavior of Android that DAC is powered on also few seconds after a sound is played and it happens with all phones.

---------- Post added at 07:35 AM ---------- Previous post was at 07:33 AM ----------

I'm not surprised at all, if they are really 10ohm. Purchase this kind of impedance adapter(at least 50ohm) and hissing will disappear.
[Xiaomi Mi A1 Questions & Answers] melonfresh:
Thanks for replying but... hahahaha, as if I'm going to have something like that in my pocket connected to my phone while listening to music. It's only a matter of time until the audio jack sustains major damage with that thing. Kernel sources better be released soon, this is really stupid from Xiaomi
[Xiaomi Mi A1 Questions & Answers] _mysiak_:
There are impedance cables available as well or cheap extension cable with inbuilt volume control should do too. I need the adapter only for my "night" headphones when my phone lays on the desk, so I do not really care about the extra bulk. But yeah, probably not the best pocket friendly solution :)
[Xiaomi Mi A1 Questions & Answers] _mysiak_:
You are right, it's AMP, not DAC, sorry for using the wrong terms. :) I believe that issue is HW and SW related.

HW because:

An industry leading 10V smart power amplifier paired with the advanced Dirac HD Sound algorithm provides powerful speaker audio output and deep lows for both music and phone calls.

The independent audio amplifier supports high-impedance headphones of up to 600Ω.

SW because: there is probably no phone with ability to control the AMP gain directly. As far as I remember and know, it is available only with custom kernels and usually for the opposite reason - people wanting higher gain. I had the very same issue with Nexus 5X and low impedance phones. Without custom kernel or impedance adapter, there was clearly audible hiss (though not so bad as with Mi A1). When I lowered the gain, hiss disappeared, but I had to crank up the volume for headphones with higher impedance (or reset the audio gain). As Xiaomi already advertised ability to drive 600ohm heapdhones, I don't believe that they will lower the gain to keep majority of people with "normal" 16ohm headphones happy. And as stock kernel doesn't have direct control over AMP, we won't have this feature officially I'm afraid. I hope that custom kernel will be able to help us.
[Xiaomi Mi A1 Questions & Answers] ludditefornow:
There is clearly some control over the amp gain as I mentioned in my previous post. The switch for speaker protection in the build.prop file lowers the gain when set to 'true'.

To my way of thinking this is direct control. What is needed are more variables instead of just on and off. Which may already exist and if it doesn't should not be hard to implement, afterall, something must be governing the amount of juice being fed to the amp.