yashsingh1/xdaforums huggingface dataset:
[Xiaomi Mi A1 Questions & Answers] moliverac8:
Can someone with the A1 rooted share his build.prop? I would like to see the audio settings in build.prop.

Enviado desde mi SHIELD Tablet mediante Tapatalk
[Xiaomi Mi A1 Questions & Answers] ludditefornow:
I will on Sunday.. not with PC now.. there are two entries regarding this aspect though.. I have been adding other entries in a hope to find some point of difference.

The entry I made a few posts back is the only entry that has made any noticeable difference to my ears.
[Xiaomi Mi A1 Questions & Answers] Anirudh44:
Wanted to ask that in sound department I am clearly not satisfied with my Redmi Note 3. Because it doesnt give stereo output and instrument seperation. All the sound just comes from one place. Its like mono output. I decided not to buy any xiaomi devices just because of its pathetic output through headphone kack. But i see people praise this device a lot. So please if anyone can clear my doubts

Cause i am thinking to buy this device today in flipkart sale.
[Xiaomi Mi A1 Questions & Answers] moliverac8:
In the build.prop in the section additional_properties there are a lot of adjustment about sound. Maybe someone van play with them and try something.

Enviado desde mi SHIELD Tablet mediante Tapatalk
[Xiaomi Mi A1 Questions & Answers] sitolupion:
A "solution" to hiss can be this:
[Xiaomi Mi A1 Questions & Answers] Pablo_AK47:
Hissing sound here, I have V-moda m100 32ohm and I can hear white noise, less than before but still there..
[Xiaomi Mi A1 Questions & Answers] _jis_:
Did you mean by this after December patch?
[Xiaomi Mi A1 Questions & Answers] Pablo_AK47:
yasss
[Xiaomi Mi A1 Questions & Answers] Supermutant22:
Has anyone tested this on the oreo beta?
[Xiaomi Mi A1 Questions & Answers] sitolupion:
I still hear the same hiss with my Dunu 2000J (8Ohm) after the December update.
[Xiaomi Mi A1 Questions & Answers] luigi7777:
I recently brought the xiaomi redmi note 4 global snapdragon 625 version and i can hear a hissing static noise when i listen to music. I listen to classical music on lower volumes with original samsung earphones that normally sound decent. Ive owned an acer z530 before this and sound was very good with same earphones . Never experienced such bad audio quality. Even the samsung smartphones i had 6 years ago sounded better. I updated the phone yesterday and still the same noise is there. I think it could be interference with magnetic fields due to poorly designed PCB. That or cheap/bad DAC and AMP parts. Think about this they have to make cuts somewhere in order to sell with such low prices compared to others.
[Xiaomi Mi A1 Questions & Answers] pooniaprashant:
Yes, would be interesting to see if Xiaomi has addressed this issue.
[Xiaomi Mi A1 Questions & Answers] _mysiak_:
In theory it might be fixed in Oreo - there is sound control included, where you can select Xiaomi headphones. I assume (hope) that it will select appropriate amplifier mode depending on the selected earphones. When we chose low impedance model, it should solve the hissing noise. Someone with beta Oreo might check and confirm. [emoji846]
[Xiaomi Mi A1 Questions & Answers] harshu0101:
and weirdly I don't have any hissing sound on my Sennheiser CX 275s
[Xiaomi Mi A1 Questions & Answers] iamakii:
I don't have this or either I just I have bad ears
[Xiaomi Mi A1 Questions & Answers] pooniaprashant:
We should probably make a Google doc regarding working headsets in mi a1 if this isn't fixed by Oreo.
[Xiaomi Mi A1 Questions & Answers] AllMenMustDie:
The hissing sound is present at very low volumes only if u listen carefully
[Xiaomi Mi A1 Questions & Answers] harshu0101:
I had seen a reddit thread with the list. Maybe you can google and find it
[Xiaomi Mi A1 Questions & Answers] pooniaprashant:
Sure, thanks
[Xiaomi Mi A1 Questions & Answers] harshu0101:
I found the thread. Here it is: https://www.reddit.com/r/Xiaomi/comments/71xrqz/mi_a1_headphone_static/
[Xiaomi Mi A1 Questions & Answers] Tubixak:
Has anyone tried it on Oreo beta?
[Xiaomi Mi A1 Questions & Answers] ShazlieyAzizan:
No hissing sound after latest december update
[Xiaomi Mi A1 Questions & Answers] whoadood:
That's not true.
[Xiaomi Mi A1 Questions & Answers] pooniaprashant:
He might me true, as hissing is dependent on earphones. It might me Xiaomi fixing hissing for each kinda earphones one by one.
[Xiaomi Mi A1 Questions & Answers] whoadood:
I swear to God you read the strangest and most psychedelic things in this forum. Like, what the fuc​k.
[Xiaomi Mi A1 Questions & Answers] amithiel:
Ahahahahah ?
[Xiaomi Mi A1 Questions & Answers] pooniaprashant:
Stick to the topic
[Xiaomi Mi A1 Questions & Answers] NewblyAaron:
Have this issue also. Only noticable on really silent output. Happens on included earphones and my Bose Headphones both bluetooth mode and wired. You can even hear it on ZERO VOLUME. Used this video for checking. https://youtu.be/g4mHPeMGTJM
[Xiaomi Mi A1 Questions & Answers] pooniaprashant:
Happens on Bluetooth also, [emoji15]

Let's see Oreo fixes this
[Xiaomi Mi A1 Questions & Answers] Devansh Bhinde:
I have cx 275s and facing hissing issue on Oreo beta.Even faced in Nougat if I recollect.
[Xiaomi Mi A1 Questions & Answers] harshu0101:
Weird. I don't have any hissing sound at all. Which music player do you use?
[Xiaomi Mi A1 Questions & Answers] Devansh Bhinde:
It starts when I plug in the wire.
[Xiaomi Mi A1 Questions & Answers] pooniaprashant:
It doesn't matter, hissing is system wide whenever audio is passed to earphones.
[Xiaomi Mi A1 Questions & Answers] a3des:
I have a really bad ear or my output is ok. Tried out first with Samsung S7 in ear headphone, no hissing sound. Also tried out with Sennheiser HD201, still no hissing. Now I have upgraded to ATH-M50x and I must say audio output is impressive. And guest what... no hissing. (even with youtube 10 hours of silence clip).
[Xiaomi Mi A1 Questions & Answers] adfds:
Is the hissing sound solved in the oreo update?
[Xiaomi Mi A1 Questions & Answers] Cr3sc3nt:
Same here, I've never heard any "hissing" sound. I switch earbuds/headsets throughout the day, earbuds while commuting, on ear when at work and over ear when at home. My main draw for the phone was the dac. Since I got phone in October never had any audio issues. Maybe a hardware batch issue?
[Xiaomi Mi A1 Questions & Answers] adfds:
The problem is a lot of people cannot hear the hissing because it is of such high frequency, so the problem is under reported. I had hissing sound with my A1 and I let a lot of my friends hear it but a lot of them could not hear the hissing while some could with same earphone.

I think hissing sound is present in all phones but a lot of people cannot hear it, or dont notice it or simply dont care.

Only people with good ears can hear it.
[Xiaomi Mi A1 Questions & Answers] pooniaprashant:
Its not a hardware batch issue, a magisk module for mia1 also fixes the issue. Its there.
[Xiaomi Mi A1 Questions & Answers] Cr3sc3nt:
If that's the case 20 + years of being an audiophile and playing multiple instruments... OMG! My ears have been deceiving me! I'm gonna kill my music instructors for pushing me towards a career in music and all along I've had bad ears! How dare they! That's means my (AP) absolute pitch is a lie also! Guess it's time to go back to school and find a new career cause I can't hear a hiss.
[Xiaomi Mi A1 Questions & Answers] moliverac8:
Did you try using the headphones in a really quiet environment with low volume? Or just normal use?

Enviado desde mi Mi A1 mediante Tapatalk
[Xiaomi Mi A1 Questions & Answers] amithiel:
Jesus, how come some people can't hear it? With the lowest volume, the hissing is so insane that I can't even understand what people say on YouTube, the hissing makes voice distortion. What annoys me the most is lots of people with oreo already, and no one comments on this issue
[Xiaomi Mi A1 Questions & Answers] pooniaprashant:
No need to be in quiet environment, watch this video, it's a completely silent video, hissing is easily noticable for anyone trying to check for it. https://youtu.be/g4mHPeMGTJM
[Xiaomi Mi A1 Questions & Answers] adfds:
Since multiple people corroborated the hissing from my phone, either you got a better phone or you are an idiot. I think it is the latter.
[Xiaomi Mi A1 Questions & Answers] Cr3sc3nt:
I also think it's the latter noob! Lol
[Xiaomi Mi A1 Questions & Answers] pooniaprashant:
Not everyone uses earphones, that too with low volume. As this issue is software related, so unless user gets a fix from Xiaomi itself it is present in every mi a1. Those who are not able to listen to it, try using different earphones, and still if you can't listen, well good for you.
[Xiaomi Mi A1 Questions & Answers] adfds:
wont rooting void warranty?
[Xiaomi Mi A1 Questions & Answers] pooniaprashant:
No, it won't.

---------- Post added at 04:10 PM ---------- Previous post was at 04:03 PM ----------

I just tested with cheap OEM earphone that came with a Motorola phone, the hissing wasn't there.

But with my regular earphones (Sony MDR-XB75AP), hissing is there.

So it's a clear example that hissing is also based on earphones, if you are not facing this issue that doesn't mean that this bug doesn't exist. Its there and also well documented.
[Xiaomi Mi A1 Questions & Answers] adfds:
And it is very annoying. Its one of those things that once you notice, you cannot stop noticing. Otherwise the mi A1 is a very nice device. I think I will just wait for moto g6. motorolas have very stock like OS and next years model will also get android P like mi A1. I suppose second gen mi A1 will be realsed in september 2018, which is too far away.

An I will wait and see if oreo update for Honor 7x has Project Treble or not. The only thing I dont like about 7x is its lack of gyroscope.
[Xiaomi Mi A1 Questions & Answers] whoadood:
Somebody here said it may have to do with voltage? I checked with a multimeter and the headphone jack of the A1 outputs more voltage than the same jack connected to another phone. But I don't know much about electronics so I don't know what that means.
[Xiaomi Mi A1 Questions & Answers] adfds:
yes it has a more powerful amp, which is why it outputs higher voltage.

But hissing sound has nothing to do with powerful amp.

phones like LG V30 has even better amps but don;t produce hissing sound.

I know LG V30 is a very expensive phone but it proves hissing sound is not a side effect of having a more powerful amp. It does not produce hissing sound with low impedance or high impedance headphones.

There is either some software or hardware problem with Mi A1 to produce the hissing sound.

And since Xiaomi has not fixed it after so many months of its release, I don't think fixing the issue is very high upon Xiaomi's priority list.

Even if it could be 100% fixed with a software update, there is no guarantee Xiaomi will ever fix it.
[Xiaomi Mi A1 Questions & Answers] pooniaprashant:
There's a thread in miui forums addressing this issue, and it's labelled as "under discussion", I believe that by the end of Jan this issue will be fixed. As there's already a magisk module fixing this issue, that would help Xiaomi as headsup for this issue. And the reason I believe they didn't fixed it by now is probably because they were working on Oreo already. I still have hope till a month [emoji28]
[Xiaomi Mi A1 Questions & Answers] whoadood:
I am afraid it might be a problem of isolation, which would be unfixable with a software update. We will see if Xiaomi releases the kernel sources and we can build our own ROMs.
[Xiaomi Mi A1 Questions & Answers] amithiel:
Can you share where is that magisk module?
[Xiaomi Mi A1 Questions & Answers] pooniaprashant:
https://xdaforums.com/mi-a1/development/magisk-module-t3702504

i haven't tested personally but have seen feedback, try it for yourself and do let me know :)
[Xiaomi Mi A1 Questions & Answers] _mysiak_:
It fixes noise during recording, not for playback. There is no SW fix for hissing noise during playback as of now.
[Xiaomi Mi A1 Questions & Answers] pooniaprashant:
Thanks for the info
[Xiaomi Mi A1 Questions & Answers] _mysiak_:
It was fixable on Nexus 5X with custom kernel which had sound control included. It was enough to decrease the headphones audio gain (I was using EX kernel manager) to remove the noise totally. Hopefully it will be the case with Mi A1 as well. Until then we have to rely on HW fix (impedance adapter or new headphones:)).
[Xiaomi Mi A1 Questions & Answers] Lecturer in Recent Runes:
I got my phone today and tried it with a pair.of Teufel Airy headphones. No hissing sound whatsoever, the sound is exactly the same as from my Moto G4 Plus.

Verstuurd vanaf mijn Mi A1 met Tapatalk
[Xiaomi Mi A1 Questions & Answers] adfds:
There is no sound with bluetooth headphones. Hissing sound occurs when using wired headphones
[Xiaomi Mi A1 Questions & Answers] amithiel:
Not true. In fact the hissing is worse on my JBL Bluetooth headphones
[Xiaomi Mi A1 Questions & Answers] Lecturer in Recent Runes:
Just tested that with wired Sennheiser CX300II buds and I can detect a very, very, very, very slight hiss when not playing music. I really had to listen for it, though, otherwise I probably wouldn't have noticed. And since the sound is also there after unplugging the buds, I guess the phone's not to blame. [emoji6]

The sound is, but that's always a matter of opinion, better than my Moto G4 Plus. Crisp, clear and with good bass. I guess the problems people are facing are down to specific headphones or, perhaps, faulty devices as it doesn't happen to everyone.

Verstuurd vanaf mijn Mi A1 met Tapatalk
[Xiaomi Mi A1 Questions & Answers] whoadood:
Well... If there's hissing with bluetooth headphones that gives us hope.
[Xiaomi Mi A1 Questions & Answers] amithiel:
I'm pretty sure this can be fixed in a custom kernel / rom
[Xiaomi Mi A1 Questions & Answers] Lecturer in Recent Runes:
Not with all headphones. I have no problems whatsoever.

Verstuurd vanaf mijn Mi A1 met Tapatalk
[Xiaomi Mi A1 Questions & Answers] a3des:
Since my last post I have asked several people to listen for hissing sound on youtube clip about silence and none of them could have identify any noise. Even younger ears than mine couldn't hear hissing noise and it's known that younger hear better the higher frequencies.
[Xiaomi Mi A1 Questions & Answers] amithiel:
I only noticed the hissing at night, when I'm at my bed. Fully silent, with volume on the minimum. During the day it's harder to notice
[Xiaomi Mi A1 Questions & Answers] a3des:
I woyld say ATH-M50x are not bad at passive noise canceling.
[Xiaomi Mi A1 Questions & Answers] melonfresh:
My Audio Technica IM-70 IEM's have 10 ohm impedance. The hissing is so bad that it is audible through regular volume listening to pop and dance, also considerably curbs the soundstage ?

I really hope a custom rom and kernel can fix this
[Xiaomi Mi A1 Questions & Answers] metal4people:
When I disabled touch sounds in settings it becomes less frequent, but still hissing sound appears when I listen to music in YouTube.
[Xiaomi Mi A1 Questions & Answers] whoadood:
The hissing occurs only when the sound circuitry is on. By disabling touch sounds, the sound circuitry is not turned on all the time, but the hissing will still occur when you play any sound, so turning off touch sounds is not a solution.
[Xiaomi Mi A1 Questions & Answers] metal4people:
Yes, definitely it is not a solution.

I've updated to Dec 2017 system update, no results.

Is this issue reported to Xiaomi?

I'd like to emphasize it's importance and to vote for fixing it asap.
[Xiaomi Mi A1 Questions & Answers] amithiel:
This is all over the web. Xda.. MI foruns, reddit, Twitter... Pretty sure also Facebook. However it's not on xiaomi priority list, and I doubt they ever fix it. It's like "you saved some money buying this phone, so now spend some on good headphones," lol
[Xiaomi Mi A1 Questions & Answers] metal4people:
Thanks for sharing your opinion. I guess I'll return it back to shop tomorrow.

Now I need find some decent replacement ...
[Xiaomi Mi A1 Questions & Answers] whoadood:
You don't need "good headphones", you need headphones with a high impedance. There are plenty of cheap headphones with a high impedance.
[Xiaomi Mi A1 Questions & Answers] amithiel:
Thanks man. I thought they were more expensive. In that case seems a viable option to deal with the issue
[Xiaomi Mi A1 Questions & Answers] Pablo_AK47:
REPORT:

UPDATED TO OREO MINUTES AGO

Unfortunately I have to tell you that the noise is still present.. I use V-moda m100 around ear 32ohm :(
[Xiaomi Mi A1 Questions & Answers] adfds:
Thank god I sold the Mi A1. Now I know Xiaomi has no intention of fixing this issue. The hissing drove me mad when I owned the phone.

Pity it is such a great phone otherwise. Hope there is a second generation to the A1 with 18:9 screen and no audio issue. I would buy that.
[Xiaomi Mi A1 Questions & Answers] _mysiak_:
Have you tried different options in Mi sound control? I don't have the update yet, so can't test myself.
[Xiaomi Mi A1 Questions & Answers] moliverac8:
I have tried all the options with mi audio, still hissing. Such a good phone but such a ****ty audio, what a pity.

Enviado desde mi Mi A1 mediante Tapatalk
[Xiaomi Mi A1 Questions & Answers] Tubixak:
I recently updated to stable oreo. The hissing sound is still here, but not only when using headphones, but even when playing audio on phone speaker. This wasn't happening before. :confused: We really need Xiaomi to patch this ASAP.
[Xiaomi Mi A1 Questions & Answers] soralz:
Well even their own headsets Mi In Ear HD Pro with 32 ohms also have this problem, just not as bad as those 10-20 ohms headset.
[Xiaomi Mi A1 Questions & Answers] itsflash:
Audio is great, using it with stock S7 earphones ( no hissing sound). There is hissing sound if I use my Amazon basics earphones, maybe a better earphone will solve your problem.
[Xiaomi Mi A1 Questions & Answers] moliverac8:
Audio-Technica MSR7 and Audio-Technica M40x are good headphones, the problem is with the phone.

Enviado desde mi Mi A1 mediante Tapatalk
[Xiaomi Mi A1 Questions & Answers] sitolupion:
I want to think that Xiaomi can not fix the problem with an update ... otherwise it would be even more serious, the network is full of complaints from users.

I will not change my Dunu 2000j (8Oh) because of Xiaomi. Its cost is double that of the telephone.
[Xiaomi Mi A1 Questions & Answers] moliverac8:
I don't think that even with custom ROMs it is gonna be solved, we have to live with this ****ty audio.

Enviado desde mi Mi A1 mediante Tapatalk
[Xiaomi Mi A1 Questions & Answers] amithiel:
It's clearly an audio gain issue, right? With a custom kernel might be fixable. We are depending on developers here, not on xiaomi, ?

Edit: actually we also are depending on xiaomi releasing the sources lol
[Xiaomi Mi A1 Questions & Answers] moliverac8:
If it is a gain issue I remember that using viper4android you could reduce gain. I don't have root but someone with root could try out. It would help.

Enviado desde mi Mi A1 mediante Tapatalk
[Xiaomi Mi A1 Questions & Answers] amithiel:
I'm rooted. Gonna check it out
[Xiaomi Mi A1 Questions & Answers] moliverac8:
Also if you can give a try to Viper4arise. It is another good sound mod.
[Xiaomi Mi A1 Questions & Answers] billysam:
Too much hissing on the hissing sound here. The whole forum makes it feel like that this is such a big issue here.

Is the sound really that bad? Yes it is when you lower the sound and listen to it carefully over the device's speaker or your normal headphones.

For most of the users, It's hardly noticeable and the sound is so good that it can beat almost every other device in the price range. But for music lovers night owls who likes to listen in pin drop silence and most of the time touch low volumes it's unbearable and unacceptable. for loud users and normal use(rare elite users), I found it best even on my headphones.(by no means I used normal headphones)

Is the hissing sound present in all the Mi A1 device? YES, definitely YES, unless you're using a headphones that is much costlier than the price of the smartphone. (if it's not then Xiaomi should be ready for claims.)

Xiaomi tried to make a device with great sound quality and it has somewhat achieved it in case of Mi A1, the call quality that it gives is, excellent and whenever it rings, it's tone is brilliant. but achieving that kind of sound came at a price.

So the question is, will Xiaomi try to fix it?

fixing this issue will cause the overall quality to suffer, something that Xiaomi will not want to do neither they can do. Initial reviews had given A1, a big thumbs up in sound department until we found the drawback that DIRAC HD Sound and High-quality audio smart power amplifier has.

What DIRAC?

An industry leading 10V smart power amplifier paired with the advanced Dirac HD Sound algorithm provides powerful speaker audio output and deep lows. The independent audio amplifier supports high-impedance headphones of up to 600Ω. (Upto 600!!)

I think they put in way too much for a mid range device. 40 is a sweet spot(Audio-Technica has 35 impedance), but they aimed for the Beyerdynamic and Sennheiser and hence we get the unfortunate sound of hiss on a normal speaker and normal headphones due to the amplifier.

I would expect the DIRAC team to release a equalizer that we can utilize according to our need for the smartphones and headphones. They have been in the music business since long(With the little info I could gather about them, I think they started with the car audio system way back in 2001), but smartphones are different and they will need to update and improvise, given their reputation(cause of the clients they had and are getting) they can work things out, but amplifier is not something you use to listen softly or on light speakers. they just aren't made for this.
[Xiaomi Mi A1 Questions & Answers] moliverac8:
It makes me laugh people who thinks that a 200€ phone has a great DAC for the audio. OK.

This hissing is horrible and you can notice it even when you increase the volume up to the middle, it is not something that is difficult to appreciate.

I don't get where is the problem in saying that something doesn't work like it should. I don't get why people get so annoyed by a critic.

I like the phone, it is the best in his price range with no doubt but this bug makes the experience quite bad in my case, in the audio department.
[Xiaomi Mi A1 Questions & Answers] pooniaprashant:
Totally agreed, but you know fanboism is a common phenomenon now, be it cheap phones, be it flagships, they're everywhere defending corporates and bullying users. Audio is pathetic, its a fact, there can be no excuse for that. I have a pretty decent quality in-ear plugs, they can cancel out any external noise when plugged in, so it doesn't matter if I am being an autistic person listening to music alone or I am doing my regular gym, all I hear is distortion.

Phone is good, audio is bad. It doesn't bother you?? Good for u, but it bothers me, so keep your enlighted thoughts to yourself.
[Xiaomi Mi A1 Questions & Answers] billysam:
"Phone is good, audio is bad"

"you can notice it even when you increase the volume up to the middle"

Phone is great, your headphones and choice of music are not apt for this device as simple as that. If you're so blind or do not understand the technology and how it works. you're a layman and this forum looks like full of cheap crybabies, who do not understand anything they are told and explained about this particular situation. there are many users who have explained what I said earlier, why and how about this issue, still you all act like please fix this. why not blame and fix the songs you choose, do you think every music composer is a genius? or every song files that you have on your device is of a masterpiece quality? Oh, Please.

"No device is made for everyone, you choose one that works according to your need".
[Xiaomi Mi A1 Questions & Answers] wulfe13:
Maybe users suddenly developed uber sensitive ears, lol