TL;DR - See thread title.
Full story:
I'm sure everyone knows about the "Listening at high volumes may damage your hearing" message. Well, I don't ever wear headphones; I plug my phone into my car's Aux jack. The warning is completely irrelevant.
My issue - when I am driving, my phone likes to randomly reset its output level back to nominal.
Mid-song, middle of a podcast, no specific app. Sometimes multiple times in a day. Sometimes weeks in between. Unpredictable.
I need to keep my phone's volume all the way up to get a decent signal-to-noise ratio for my car stereo. If I leave the phone below the warning/nominal level, I have to turn the stereo up a lot louder, and it sounds noisy.
If I'm driving down the highway, I prefer to never interact with my phone. If the "Listening at high volumes may damage your hearing" nanny-ware popup decides to appear while I'm trying to drive, and I've got another hour left before I get home, this demands I look at my phone to correct the issue. Unsafe.
My car only has an Aux input, and I think 1/8" Bluetooth adapters sound like garbage. I want to continue using analog connectivity.
So, back to my original question - Does anyone have experience with $100-tier external DACs paired with a Moto One 5G Ace? When in use, does the Moto recognize these devices as "headphone jacks," or line outputs that require no headphone volume warning?
I'm willing to drop the money if it will actually solve my nagging safety issue.
Related
As the question asks: any out there does this?
My bluetooth wireless audio adapter went for a ride in my washing machine, and now the left channel is much diminished. Thankfully it still works.
Being ever cheap, I want to keep using it. To fix it temporarily, I was wondering if there's any audio player out there that adjusts the left/right balance like in winamp?
I once went to watch something on my phone and found it only had sound on one channel. As a workaround in coreplayer, I set it to play in mono which would probably work for you as well. You can choose from getting the sound from left, right or joined.
That's different than my current issue
Because of the trip through the washer, I suspect that the amp on my bluetooth dongle is damaged, especially the part responsible for outputting to the left channel (excuse my horrible layman logic).
In any case, my cheesy workaround is to use a utility on the transmitter that artificially increases the gain on the left channel, such that it compensates for the lack of output from the left channel of the dongle into my ear.
Artificially restoring L/R balance, really
So, recently I've started having some issues with the headphone port on my OnePlus One:
When headphones (not a headset, no microphone or button) are connected, any media that might be playing will either get paused, or the Google Now voice search will appear. This happens especially often if turning the headphone jack in the port, or if I'm watching a YouTube video (don't think it's a software problem), but I digress. If the headphone jack is being bent even slightly (even from just having one finger resting on it while keeping the device in landscape) the audio will somehow warp. I don't know how to describe it, but basically usually speech either goes completely silent, and background music/audio keeps playing at normal volume, or the speech gets really distant and echoey.
I don't know what's up. I looked around online, and the only thing I could find is that there might be some dirt stuck inside the port. I don't have a can of compressed air at hand, but if needed, I can most likely get one.
The device is the OnePlus One (A0001) and it's running CyanogenOS 13.1 (Android 6.0. 1). It's not rooted.
Thanks in advance
I have a MTCD/MTCE head unit from Witson(MX) and i'm using the latest Malaysk rom and Mcu(1.75) for my unit.
I can hear a low pitched static noise from speakers when car is silent. It's not loud, but i can hear it. I just realised source of this static is LCD screen. If I decrease brightness of LCD or completely shutdown LCD the static noise came from speaker stops. The sound is even changing with respect to colors on LCD.
My question is: I don't want to return my unit. Can someone with technical knowledge say me how can i solve this problem? Should i install some kind of filter on speaker cables? Should i ground case of the unit or Lcd?
I have the same noise, I didn’t do anything about it because I never have a situation without listening to something. When I drive it’s impossible to hear it.
Sent from my iPhone using Tapatalk
Interesting. I have the same noise but haven’t figured out what causes it. I’ll check your LCD theory tomorrow.
a) I have PCB mounted quadlock (VW) on rear of HU
b) i have factory fitted amp in skoda superb ii (VW quadlock - not RCAs used)
c) with aftermarket HU, the amp is turned on when the key is in ignition position and not controlled by canbus like with original
** this is have a very faint hiss from the unbalanced line input being on without a source, but is not the noise we are referring to here **
d) noise is not present if i put back Chinese WinCE HU or original RNS315
e) there is no noise during initial boot screen, or car logo or even during loading of Car Loader AG (inc with HA rom) from cold boot
f) shortly after the Loader screen, the +/- volume keys become active - this is when the noise starts (motor running or not - the noise is the same)
g) if you put the car in reverse prior to turning on, you see white lines about 1cm apart before the vol +/- is activated.
h) once the volume is activated, the noise includes a clicking of about 150-180 bpm (the white lines on the reverse camera flicker to this beat as well)
i) using factory settings/touch keys to config pwr key for short press screen off / long press pwr off and the screen off does not affect noise.
j) changing the factory settings/other/amp gain from 0 to -12db or -15db lowers the noise gain but requires increase volume to overcome the noise.
k) the noise varies and fluctuates with changes in the menu e.g. scrolling and display e.g. download % counter changes
l) the noise varies and fluctuates with touches to the touch screen
m) the noise does not change in amplitude with changes to the system volume control
I have seen a thread where it is suggested, that the interference is coming from the LCD screen and can be verified by turning the screen off - see g) above
** the other thing i am suspicious about is the grounding. I am connected through Quadlock, but trying to power via the Quadlock on a bench doesn't work. Only via
the white connector with the RCAs. says to me something funny going on with either the power or ground wiring. **
Based on all the above, it seems fairly clear that the issue is either the LCD/CPU or some other RF component inducing the noise into the system. i.e. design fault.
I don't have an oscilloscope so can't probe if the noise is on the LCD cables or being induced by the screen RFI without shielding.
Simple test might be to remove the front screen (while still plugged in) and extend the cable moving the screen as far as possible, possible place a metal sheet behind the screen and in front of the unit, to see if the noise changes.. That would at least tell if it is a shielding problem with the screen.
i am surprised there is no solution to this so far, as it is commonly reported among various brands of the PX5 Android boxes.
I am going away, so wont be able to look at this for a few weeks, but would like to hear from anybody who is game to try removing the screen from the case initially.
gwaitsi said:
a) I have PCB mounted quadlock (VW) on rear of HU
b) i have factory fitted amp in skoda superb ii (VW quadlock - not RCAs used)
c) with aftermarket HU, the amp is turned on when the key is in ignition position and not controlled by canbus like with original
** this is have a very faint hiss from the unbalanced line input being on without a source, but is not the noise we are referring to here **
d) noise is not present if i put back Chinese WinCE HU or original RNS315
e) there is no noise during initial boot screen, or car logo or even during loading of Car Loader AG (inc with HA rom) from cold boot
f) shortly after the Loader screen, the +/- volume keys become active - this is when the noise starts (motor running or not - the noise is the same)
g) if you put the car in reverse prior to turning on, you see white lines about 1cm apart before the vol +/- is activated.
h) once the volume is activated, the noise includes a clicking of about 150-180 bpm (the white lines on the reverse camera flicker to this beat as well)
i) using factory settings/touch keys to config pwr key for short press screen off / long press pwr off and the screen off does not affect noise.
j) changing the factory settings/other/amp gain from 0 to -12db or -15db lowers the noise gain but requires increase volume to overcome the noise.
k) the noise varies and fluctuates with changes in the menu e.g. scrolling and display e.g. download % counter changes
l) the noise varies and fluctuates with touches to the touch screen
m) the noise does not change in amplitude with changes to the system volume control
I have seen a thread where it is suggested, that the interference is coming from the LCD screen and can be verified by turning the screen off - see g) above
** the other thing i am suspicious about is the grounding. I am connected through Quadlock, but trying to power via the Quadlock on a bench doesn't work. Only via
the white connector with the RCAs. says to me something funny going on with either the power or ground wiring. **
Based on all the above, it seems fairly clear that the issue is either the LCD/CPU or some other RF component inducing the noise into the system. i.e. design fault.
I don't have an oscilloscope so can't probe if the noise is on the LCD cables or being induced by the screen RFI without shielding.
Simple test might be to remove the front screen (while still plugged in) and extend the cable moving the screen as far as possible, possible place a metal sheet behind the screen and in front of the unit, to see if the noise changes.. That would at least tell if it is a shielding problem with the screen.
i am surprised there is no solution to this so far, as it is commonly reported among various brands of the PX5 Android boxes.
I am going away, so wont be able to look at this for a few weeks, but would like to hear from anybody who is game to try removing the screen from the case initially.
Click to expand...
Click to collapse
It's not the LCD, at least on my unit. The noise is much higher if I connect a flash memory to one of the USB connectors. I can hear the noise as Android is reading the memory content. I think the noise from the digital domain is getting to the analog path somehow. Would be interesting to install some power filters for the analog part or play with the grounding. May do it later if I can find some free time... I do have an oscilloscope but I don't have the time for the research yet...
G0bl1n said:
It's not the LCD, at least on my unit. The noise is much higher if I connect a flash memory to one of the USB connectors. I can hear the noise as Android is reading the memory content. I think the noise from the digital domain is getting to the analog path somehow. Would be interesting to install some power filters for the analog part or play with the grounding. May do it later if I can find some free time... I do have an oscilloscope but I don't have the time for the research yet...
Click to expand...
Click to collapse
I found it easier to track down with a signal tracer, i.e. a probe connected to an audio amp and headphones.
xdamember2 said:
I found it easier to track down with a signal tracer, i.e. a probe connected to an audio amp and headphones.
Click to expand...
Click to collapse
I removed the main board from my unit. Bottom layer on the PCB is filled with a ground plane but has many connections cutting through it. I'm wondering if they have a dedicated ground plane as a middle layer. If they don't it's possible there are ground loops which can cause the noice. I will try to add some wires to improve the grounding. Will update when I have any info.
i can hear static too but from my little speaker that produces the parking sensors and indicators sounds.. when the unit seems to be processing i can also hear some. Let us know later @G0bl1n.
Hello, I have the noise when the car radio is connected to wifi or bluetooth
Guys...check your Wifi angena on the back....it makes this annoying noise. Change wifi antenat to external on the cable.....it fixes issue 100%
BoNt3k said:
Guys...check your Wifi angena on the back....it makes this annoying noise. Change wifi antenat to external on the cable.....it fixes issue 100%
Click to expand...
Click to collapse
Can someone else confirm this solution please? It's very difficult to dissamble the head unit from my car.
traxformania said:
Can someone else confirm this solution please? It's very difficult to dissamble the head unit from my car.
Click to expand...
Click to collapse
Did you find any solution? I have the same problem
Any updates on this? I'm experiencing the same issue when the LCD screen is bring used... Eben noting a significant difference between noise when a live wallpaper vs a plain wallpaper is being used. Would in line magnets in the power and ground source help? Any progress? This is really frustrating
Jonnymooshoo said:
Any updates on this? I'm experiencing the same issue when the LCD screen is bring used... Eben noting a significant difference between noise when a live wallpaper vs a plain wallpaper is being used. Would in line magnets in the power and ground source help? Any progress? This is really frustrating
Click to expand...
Click to collapse
Not sure if it's the screen itself or the electronics on the board controlling the screen. If I ever get more time on my hands what I would love to do is try extending the ribbon cable on the screen so I could remove it away from the unit and see what that does for noise. If it works then you could always dash mount the screen and stick the unit under your seat... or what ever. Haven't had the time though.
Anyway, there have been a lot of threads and posts on noise with people trying all sorts of stuff to stop it and I haven't seen a foolproof method yet.
One thing which seems to work for those using external amps is to use the speaker level outs and convert down as opposed to using the rca outs. Another thing which seems to work is to adjust the gain on the external amp down until the noise is no longer heard. You do obviously lose a bit of volume headroom though.
I have just installed an Erisen 7591-HA (PX5) into my 2010 Golf Gti and I am getting static and digital processing sounds through my speakers.
If I mute the head unit there is no static or other sounds.
The digital processing noise happens when playing music via usb and Spotify when selecting the next track.
This is my first Android head deck and I am really disappointed.
Sound is going through an Alpine PDX-F6 amp.
I have tried disconnecting the radio plug and removing the head unit from the dash but no change still has static and processing sounds.
Sound issues remain if the engine is off it makes no difference.
Static and digital sounds do not increase with volume, it remains the same no matter what volume it is at unless the head unit is muted.
Good quality RCA and speaker cable was used.
Any help would be greatly appreciated.
I have the same issue with a Belsee unit I installed last week. Do you have a line-level filter in your harness? I have a theory that the line-level filter that's included in mine is unnecessary, as it's coming straight off where the RCA outs would normally be (and those are line level already, right?).
tonyarnold said:
I have the same issue with a Belsee unit I installed last week. Do you have a line-level filter in your harness? I have a theory that the line-level filter that's included in mine is unnecessary, as it's coming straight off where the RCA outs would normally be (and those are line level already, right?).
Click to expand...
Click to collapse
No I do not have a line level filter on mine.
I have tried using an RCA GROUND LOOP ISOLATOR but this done nothing.
Below is a link to the sound I am getting from the head unit, you will see it only makes the sounds when volume is not muted.
https://www.youtube.com/watch?v=0vhT7AavZbg
Same issue on my PX5 KGL unit, not tested with filters or similar...
I read somewhere that the LED color-changing caused interference - and I noticed that you have yours setup that way. Have you tried setting a static color? Also, make sure all of your wiring is clean and try to keep any speaker wires away from any power wires (although that is more applicable to an external app setup).
Can you hear the noise at all while music is actually playing? Obviously, it would be better if it wasn't there are all, but if you can't hear it normally (only hear it when nothing is playing), then I wouldn't sweat it too much. All you can do is make sure that your wiring is clean and maybe try adjusting the LED settings and the "pre-amp" settings under the factory menu (maybe see if reducing the "System" setting under "Voice" helps reduce it). Once you try using things like ground-loop isolaters, etc, then there is a chance that the music fidelity is reduced even more.
jtrosky said:
I read somewhere that the LED color-changing caused interference - and I noticed that you have yours setup that way. Have you tried setting a static color? Also, make sure all of your wiring is clean and try to keep any speaker wires away from any power wires (although that is more applicable to an external app setup).
Can you hear the noise at all while music is actually playing? Obviously, it would be better if it wasn't there are all, but if you can't hear it normally (only hear it when nothing is playing), then I wouldn't sweat it too much. All you can do is make sure that your wiring is clean and maybe try adjusting the LED settings and the "pre-amp" settings under the factory menu (maybe see if reducing the "System" setting under "Voice" helps reduce it). Once you try using things like ground-loop isolaters, etc, then there is a chance that the music fidelity is reduced even more.
Click to expand...
Click to collapse
Yeah have tried all the above and nothing changes.
The sound quality is poor also with higher ranges being really scratchy.
I am sure the unit would be fine if not using a higher end amp and just running the speakers off the head unit, I have read a few posts online and on youtube that the RCA output signal can be really poor with certain brands.
I just sent the unit back today for a full refund and will now be buying a brand name such as Alpine, Pioneer etc etc
https://www.hifimax.net/6-95-inch-android-7-1-quad-core-16g-auto-navigation-gps-head-unit-for-bmw-mini-2006-2013.html
Installed that unit with android 8 4gb 32gb option for a 2013 Mini Cooper Countryman S, installation went quite well, fit is great.
I knew that the factory unit was responsible of playing the vehicle chime and indicator sounds, including the blinker turn signal sounds. Before purchasing a wire harness adapter for bmw/mini that makes up for the vehicle chime/indicator sounds, I thought I'd see what solution this head unit had built in.
Unfortunately, the sounds aren't great. The unit has an external speaker that emits the sounds. The speaker is fine, but the only sound that DOES work is the blinke/turning indicator sound which is absolutely terrible. The blinker indicator tone programmed in is a recording of a classic oldschool mechanical electromagnetic relay switch tinging on and off loudly with a *twang*, lol. The length of the sound file is also too long, meaning it takes time for the sound to stop playing after the turning signal has stopped blinking. Door chimes, key/fob dinger doesn't work, vehicle information notification tone doesn't do anything. Something is strange.
The can-bus decoder seems to be built into the unit pulling from the factory wire harness that is pre-wired. I have no idea where these files are stored, if they are on a subsystem rom that's inaccessible or what but it would be very cool to be able to rewrite the audio files to work like factory. I am up to plugging in the factory unit to record all of the factory tones with some high end recording equipment I have to make it right.
Anyone have any leads of where to begin to correct this?
From my reading the CANBUS external box (which has the external speaker attached) is what is generating the sounds so unfortunately they aren't coming from the head unit itself.
millab said:
From my reading the CANBUS external box (which has the external speaker attached) is what is generating the sounds so unfortunately they aren't coming from the head unit itself.
Click to expand...
Click to collapse
I don't believe that is correct as the speaker is just a 2-terminal connector plugging into the back of the LCD panel module (which houses the px5 processor module, most of the computational components. )
I have the exact same setup and am hoping for a fix...the new sounds are awful and I really miss the key and light warnings.