Database Info

Noise using with the car charger

I'm using the Desire as music player in mine auto. It's connected via aux to the stereo and works well, but when I connect the usb car charger begin a loud noise...that's connected directly with the car motor, because more high are the rpm and more is loud this noise
What I can do for solve this problem?

Same thing here, it has always been this way even with my old Nokias, HTCs, MP3 players... it's an interference you can't suppress, while charging and using an audio cable to AUX IN.
ps. I'd really like to be proven wrong by someone else who finds a solution for me, either!

By the way, how do you handle hands-free? You hear callers voices but you have no mic to speak in so they can't hear you.
Do you know any way to use Desire's mic as input AND 3.5mm-audio-out as output?

You need a noise filter! Google "car stereo noise filter", thye're cheap.

I dont get this, but I used to in my old car.
Its easy, you need a noise supressor on the line - what you are hearing is alternator whine (a whine that changes in pitch with the RPM speed on the car).

http://www.caraudiobook.com/car_audio_noise_troubleshooting/car_audio_noise_troubleshooting.htm

You need a "ground loop isolator", get one cheap with the connections you require from ebay.

losdrivare said:
You need a "ground loop isolator", get one cheap with the connections you require from ebay.
Click to expand...
Click to collapse
Doens't exist a car charger that includes this "ground loop isolator"?

Car Dock Audio Out

Anyone whose car dock audio port works? Where you can plug the audio cable into the dock and the phone's audio (Pandora) would come out of the car speakers?
If so I'd like to know what ROM you are running. On my GummyCharged GBE 1.5 I have to plug the cable in the phone itself to get audio out to work.

go into settings/dock settings/ there you check off Audio output mode. That should force it to use external speakers. Just a heads up your phone call audio will NOT go through external speakers if you use the line out jack....dunno why >.<
Let me know if you get pig squealing through your car audio....happens to mine regardless of GB rom or Froyo...think it may be ground looping but it works fine through the headphone jack.
Let us know!

nighteyes_wolf said:
go into settings/dock settings/ there you check off Audio output mode. That should force it to use external speakers. Just a heads up your phone call audio will NOT go through external speakers if you use the line out jack....dunno why >.<
Let me know if you get pig squealing through your car audio....happens to mine regardless of GB rom or Froyo...think it may be ground looping but it works fine through the headphone jack.
Let us know!
Click to expand...
Click to collapse
I wonder if that external speaker setting will effect Car Dock Home v3 also.

Okay, it now works through the audio port on the dock. I'm not sure if this is the pig squealing you're referring but, but there is a squeal when there's no audio being played, like between tracks on Pandora. But once audio is engaged the squeal goes away.

lol no, for me as soon as I attach it it goes "WEEEEEEEEEEEEE GARBLE BARBLE TSSHSSHHHHHHH" at like 100db >.>
scares the **** out of me hahaha

nighteyes_wolf said:
lol no, for me as soon as I attach it it goes "WEEEEEEEEEEEEE GARBLE BARBLE TSSHSSHHHHHHH" at like 100db >.>
scares the **** out of me hahaha
Click to expand...
Click to collapse
But do you hear it once music is playing? The squeal is constant for me as well when the audio plug is inserted. Once music starts it goes away, and I'm not talking about the music drowning out the squeal either, it goes away as if another signal takes over.

ya, it would come in and out randomly regardless if music was playing or not. I think its just a pesky ground loop cuz I do not get it when plugged into the headphone jack, only the line-out which shares the power. I'll do more experiments.

ok I just figured something out....the squealing only happens when the car dock mode is on....when I disable it on the phone it goes away. will be doing more testing to make sure it was not placebo

Awaiting for details then, the troublesome sounds I hear are related to the power plug, not the audio plug.

ya, i imagine that too, BUT even with the power disconnected from the port, and only having the audio cable hooked into it and my head unit, I would get the piercing, and i mean PIERCING, squeal. but as soon as I turn off 'car dock mode' it goes away. weird....

nighteyes_wolf said:
ya, i imagine that too, BUT even with the power disconnected from the port, and only having the audio cable hooked into it and my head unit, I would get the piercing, and i mean PIERCING, squeal. but as soon as I turn off 'car dock mode' it goes away. weird....
Click to expand...
Click to collapse
Have you tried different car dock apps?
My brother thinks something like this may solve the problem: http://www.amazon.com/Kensington-No...7?s=electronics&ie=UTF8&qid=1311182929&sr=1-7
He has a HTC one I will be borrowing to see if it solves the problem.

The audio filter thing took care of distortions when no sound is playing. One thing that does piss me off though is the I'm having to plug the AUX from car directly into the phone instead of the dock since Voodoo sound does not work when not plugged into the phone's audio port and it makes a huge diff in sound quality (with Headphone Amplifier set to 0dB from default -10dB).

[HARDWARE PROBLEM] Headphone jack static/hiss noise?

Hey guys,
I bought a One X recently, and I am noticing some static/hiss/noise coming from the headphones.
I tried connecting my One X to bigger speakers, and the noise is more noticeable this way. This is an odd issue, because none of my other phones behave this way.
The funny thing is, if you play music or notification noises play when the phone is connected to speakers, the noise goes away. But after one second, when the DAC shuts off, the noise comes back again.
My friend's One X has this problem as well, so I don't think I just have a lemon here.
Other forums seem to be talking about this issue as well
http://www.htconeforum.com/forum/htc-one-x-help/300-htc-one-x-sound-issues-headphones.html
http://www.htconeforum.com/forum/htc-one-x-help/327-sound-issue.html
I found one review that mentions this issue. They talk about it in the Beats Audio section, and there's a video with the noise.
http://www.tekgadg.com/home/2012/6/15/htc-one-x-rogers-review.html
I remember using a really cheap chinese knockoff mp3 player about 8 years ago, and the One X seems to have the same problem as that mp3 player. Could it be that the One X has a cheap DAC in it that causes this noise?
Anyone else experience this problem?

The first link is about the international version, the lte one x is technically the One XL, and this is the first time hearing about this. Mine doesn't have a problem and I listen to music all the time.
Just and idea possibly cheap headphones?
Sent from my HTC One X using Tapatalk 2

My music is crystal clear, probably one of the best quality sound outputs I've heard from a phone actually.

Mine has this problem, but I only notice when I hook it up to my car speakers (with an aux cable) and not with headphones (Bose). It's a lot more pronounced when the phone is plugged into usb as well. Once sound plays though, the hissing stops completely. It's only when there is no output that the hiss is present.
Edit: Could it possibly be interference from the cellular radio? Maybe once the DAC kicks in it filters out the interference?
Edit 2: Just read the 3rd link and yeah, my speculation seems to have some validity
"Adding insult to injury, HTC One X features a badly shielded headset jack that makes noise whenever it is hooked up to sensitive speakers. We compared it to high-end and low-end phones, and none of them made the annoying static noise that the One X makes. This isn't a serious problem for people who only listen to music through headphones, but you may want to stay away from the One X if you are thinking about playing music through it with big speakers."

I had the same problem. If you are rooted, disable beats audio notify with titanium backup. I did this and use power amp with custom eq settings and do not notice any hiss whatsoever.
Sent from my HTC One XL using XDA

Same problem here. WAY worse when plugged in and in my car. On regular headphones no problem. In my car it's huge. To me it reeked of a poor ground somewhere, to the point that I thought my unit was defective. If it were a shielding problem I would think it would be an issue all of the time, not just when the thing is "inactive" (ie not driving the jack). I've "disabled" beats to the extent that I can without rooting, and it had no noticeable difference.
Glad to hear it's not just me.

I notice the problem when I use both the microUSB charger and headphone jacket. Disconnect the charger cable usually solves my problem. Now, I switched to use BT car adapter instead of aux cable and I can use car charger without noise.

The problem is called BEATS AUDIO!
scroll to the bottom
http://www.gsmarena.com/htc_one_x-review-747p5.php

designgears said:
The problem is called BEATS AUDIO!
scroll to the bottom
http://www.gsmarena.com/htc_one_x-review-747p5.php
Click to expand...
Click to collapse
I still get the hiss despite disabling Beats (as in just turning it off in the notification shade), although it is definitely not as bad as having Beats turned on. I'll freeze HTCBeatsNotify and see if it helps on the way to work tomorrow morning.

stnguyen09 said:
I still get the hiss despite disabling Beats (as in just turning it off in the notification shade), although it is definitely not as bad as having Beats turned on. I'll freeze HTCBeatsNotify and see if it helps on the way to work tomorrow morning.
Click to expand...
Click to collapse
Sadly beats audio is integrated beyond what you can turn off in settings.

so, the only solution is to root the phone and completely kill Beats Audio?
I guess it's not a hardware problem then... Man, that sucks. Has this issue been brought to light by some big sites yet? We need to do something so HTC learns from this mistake.

By the way, here's the update I promised...
Like I said before, I disabled beats from the notification pulldown but the hiss was still there, although slightly less annoying. I froze HTCBeatsNotify (or whatever the actual name is) using TiBu so Beats doesn't even show up when I plug it in. Unfortunately, the hiss is still there at the same level it was at when I just disabled Beats from the notification pulldown.
Is Beats actually integrated into the hardware? Is the "poorly shielded headphone jack" mentioned in one of the OP's links still a valid assumption? Can someone running CM9/AOKP chime in on whether they get the hiss?
Edit: Before I head home today I'll go into Airplane mode to try to rule out the headset jack shielding.

Annnnd of course my experiment failed...hiss is still there

If the headphone jack is indeed poorly shielded, couldn't it pick up interference from anything? Not just the internal radios?
This means we'll have to go into some radio-free environment in order to determine whether it's the headphone jack or Beats Audio that causes this annoying hiss.
In either case, I'm disappointed in HTC.

ai4281 said:
If the headphone jack is indeed poorly shielded, couldn't it pick up interference from anything? Not just the internal radios?
This means we'll have to go into some radio-free environment in order to determine whether it's the headphone jack or Beats Audio that causes this annoying hiss.
In either case, I'm disappointed in HTC.
Click to expand...
Click to collapse
Well I mean, the internal radio would be the strongest signal in the immediate area that would cause interference. Just look at old, poorly shielded computer speakers, they had issues only when a phone would go off within maybe a yard of them. I was in a parking garage at the time I tested and I'm not sure if there was anything else around that would be powerful enough to cause the interference.
Also something I noticed which may lend credence to the DAC being the source of the issue...Just plugging my phone into usb and having the headphone jack attached does not produce as much interference as when I'm streaming from Google Music and it gets caught buffering. As in, when the DAC would still be active but no audio is output. The hiss during that situation is quite a bit worse than just having the phone sit there not doing anything.

Since Beats is just a glorified equalizer, it could be that Beats just happens to be boosting the sound frequencies of the hiss and making it sound louder, and not the actual source of the hiss itself. So maybe it is a hardware issue.

Again, I can't imagine ti being "poor shielding" because that would not immediately go away once you started playing music. Think about typical cell phone interference from a radio. You're playing music, and you hear that "bvvvvrerrerrr" sound.
In the case of the HTC, as soon as you start playing music, the hum goes away IMMEDIATELY and completely as far as I can tell. If shielding were the problem it wouldn't it still be distorted regardless of whether the jack was actively playing anything or not?
Seems more to me that the DAC is leaving some signals floating, leaving them susceptible to noise, when it's not active, when it should be pulling them to a known state (probably ground)

Not from DAC either. If you plug in a headphone, you will not hear these noises. It seems only occur when you plug into AUX import of car or amps.
So, it is a hardware design problem that causes dirty interference escaped into audio output. When you plug in a normal headphone, it has very low impendence and the noise will not get amplifed at all. If you plug it into an AUX import, it will have a much higher impendence and hence the noise get carrier over and amplified.

foxbat121 said:
Not from DAC either. If you plug in a headphone, you will not hear these noises. It seems only occur when you plug into AUX import of car or amps.
So, it is a hardware design problem that causes dirty interference escaped into audio output. When you plug in a normal headphone, it has very low impendence and the noise will not get amplifed at all. If you plug it into an AUX import, it will have a much higher impendence and hence the noise get carrier over and amplified.
Click to expand...
Click to collapse
Your explanation makes perfect sense. This seems to be the issue.

foxbat121 said:
Not from DAC either. If you plug in a headphone, you will not hear these noises. It seems only occur when you plug into AUX import of car or amps.
So, it is a hardware design problem that causes dirty interference escaped into audio output. When you plug in a normal headphone, it has very low impendence and the noise will not get amplifed at all. If you plug it into an AUX import, it will have a much higher impendence and hence the noise get carrier over and amplified.
Click to expand...
Click to collapse
ai4281 said:
Your explanation makes perfect sense. This seems to be the issue.
Click to expand...
Click to collapse
I think we have a winner!

Scratchy audio

So here is the scenario:
The car I drive has an audio cassette and I've had the car for about a year now and I've been using a cassette / headhone jack adapter to listen to music, handle calls, and be told where to go by navigation lady. Been through a touch pro 2, my touch 3g slide, sidekick 4g, and this one.
Music bumps properly with slight variations with the quality, I keep the system volume down to half or less to avoid strain on the speakers. No problems there. Phone calls on the other hand; I always turn down the volume on the stereo unit and knock the in-call phone volume down a couple more notches so the person on the other line doesn't sound like a banshee being smothered with a pillow ripping out my speakers.
All my prior devices had no issue after I found that proper balance of course. Unfortunately this device does not play nice at all with my car audio. Didn't matter if I were on stock or any of the different flavors of ICS posted. Any thoughts?
Sent from haha

If I had to guess i'd theorize that either the deck or the adaptor has noise reduction built in magnetically which could be causing a problem with the output of the phone, no idea why it would, through the stereo... or your stereo has recently developed a dirty head or (insert term for spinning thing that turns the cassette wheels that I don't remember here).
Or... the plug on your adaptor is not contacting the jack properly due to its not having a microphone pin as well and THAT is interfering with the sound.
Sent from my SGH-T699 using xda app-developers app

onebornoflight said:
If I had to guess i'd theorize that either the deck or the adaptor has noise reduction built in magnetically which could be causing a problem with the output of the phone, no idea why it would, through the stereo... or your stereo has recently developed a dirty head or (insert term for spinning thing that turns the cassette wheels that I don't remember here).
Or... the plug on your adaptor is not contacting the jack properly due to its not having a microphone pin as well and THAT is interfering with the sound.
Sent from my SGH-T699 using xda app-developers app
Click to expand...
Click to collapse
Dirty heads never came to mind, ill see about acquiring a head cleaner. Hopefully that will kill the banshee that lives in my car stereo. Thanks for the help!
Sent from haha

Audio output static noise with adapter

Hi everyone, I got my new mix 2s this week and I am sad to say it has audio problems when using the included usb-C Jack adapter.
My car is equipped with a sony stereo with a front facing AUX in, a cdx-gt33u. So, as soon as i plug the phone in the aux in, there's a hiss, a loud white noise. After some seconds that the screen is locked or the phone isn't sending any audio the noise stops. When I play music the noise starts again and covers the music as it is louder.
I tried every cable I had, even in a friend's car with a similar stereo unit and the problem is the same. With a TRRS cable (one with also the microphone's ring) there are also clicks and pops.
I would like to keep this phone as I really like it (and I can't find any good alternative for about 500€) but I found no fix. I'm considering returning the device as I work with audio professionally and not being able to play music in my car is just ridiculous.
What's your experience? Did I get a broken device or is it a software issue?
MIUI version is MIUI Global 9.5 Stable (9.5.19.0 (ODGMIFA)
EDIT: I considered installing another rom or rooting to apply the "<ctl name="RX HPH Mode" value="CLS_H_HIFI" /> Replace CLS_H_HIFI with CLS_H_LP"" fix, but I bought the phone less than a week ago and rooting it just to listen music doesn't seem reasonable to me.

It's working just fine in my cars audio in... However, the LG G6 my girlfriend owns has the same problem with my car that you just described

I don't experience any audio problems when using the USB Audio Adaptor with wired headphones. Car audio systems sometimes have issues though when you hook up a phone with a wired sound connection. I think a grounding issue creates the noise.

jhs39 said:
I think a grounding issue creates the noise.
Click to expand...
Click to collapse
You are totally right. Yesterday I bought a ground loop isolator and the problem is gone.
I also got a small bluetooth receiver to put into my stereo aux in. Quality is worse but at least I can just leave it in the car without having to worry about adapters! (now I have to worry about its battery though)
This jack-less technology is leading us in a really uncomfortable direction but I guess we have to live with it.

yophio said:
You are totally right. Yesterday I bought a ground loop isolator and the problem is gone.
I also got a small bluetooth receiver to put into my stereo aux in. Quality is worse but at least I can just leave it in the car without having to worry about adapters! (now I have to worry about its battery though)
This jack-less technology is leading us in a really uncomfortable direction but I guess we have to live with it.
Click to expand...
Click to collapse
I agree unfortunately. Phone device manufacturers and headphone makers seem to have decided that we're going to have to use Bluetooth whether we want to or not.
---------- Post added at 07:07 PM ---------- Previous post was at 07:04 PM ----------
yophio said:
You are totally right. Yesterday I bought a ground loop isolator and the problem is gone.
I also got a small bluetooth receiver to put into my stereo aux in. Quality is worse but at least I can just leave it in the car without having to worry about adapters! (now I have to worry about its battery though)
This jack-less technology is leading us in a really uncomfortable direction but I guess we have to live with it.
Click to expand...
Click to collapse
You could leave the adapter in your glove compartment in case the battery runs down on your Bluetooth receiver.

Ive got a bluetooth receiver in my glove box powered by usb from my head unit so it turns on/off with the stereo. Its arguable that audio is worse using bt if you have aptx codec or even better aptx-hd which is virtually lossless. Using the dac in the phone could induce more noise because if the space constraints in a phone and proximity or rf components. Having a good quality Bluetooth receiver with a quality dac could be better. Best of all is a usb dac though.