Hi guys,
I've found a very interesting sound effect on my O2 XDA Mini (=Magician). I've been having the phone for a few days only, but right from the very first calls I noticed that the speaker creates a very high frequency continuous beep-sound, not loud of course, but crazy high, something like the well-known side effect of the old CRT TVs. At first I thought it is produced during a conversation. Then today, I held my phone to my ears without any calls, and guess what: the beep is there. :shock: It's produced always!
I started to look around, and had a hunch that the LCD backlight can be the problem. I played a little with the backlight setting and found that I was right, the sound is poduced only when the light is set to low. It's loudest at the first notch of the light slider, and gets more and more quiet as you set the backlight higher.
Now I wonder if it's a special problem with my phone (like some bad quality filtering somewhere in the power electronics of the backlight system) or if it is the same with your devices.
Please try it and post your comments. Listen closely! And try both ears (not kidding), the sound is very quiet and very high in frequency, so your ears may not be up to the task to pick it.
Have to be honest I can't get a quite second at the moment but I'm pretty sure I've noticed this noise before as well. Another noise which can be irritating is the GSM radio module and it's intermitting buzzing (a quiet version of what you hear when unshielded speakers pick up your signal).
So basically I'm not sure but I think it's a generic issue with the backlight
Hi,
I found that too....
it's quite irritating as it looks like an old TV turned on.
I hope that won't be a problem to our ear in the future
After about a week of usage (no problems at all), a very high pitch tone is now heard whenever the display is on. If the display is turned off, everything is nice and silent.
This tone is (pure guess here) about 10-12.000 hertz and very annoying since you are holding the phone to your ear during calls. It can be heard from about 5 meters away in a silent room.
It does not matter if the sound volume is off, on vibrate or on. It does not matter if the display backlight is on or off or what level the light is at. A hard-reset didn't do anything either. It also does not matter if WiFi, Bluetooth of the phone radio is on or off.
Any guesses? Should I just return it for repairs or does someone have a fix?
Best regards,
- Soren
It is usually the backlight lamp emits this buzz on some PPC...
But u mention you hear this even the backlight is off...
That's weird... but u need to exchange it back ..looks like HW issue to me
Hi Soren,
Definatly a hardware issue - I'd send it back for repair.
It sounds like the PWM (pulse width modulator) circuit has gone funny. This circuit produces the required -10v or so the display requires from the +3v battery. It's quite common to hear a very low buz at the frequency you mention on most phones.
Gav
I have recently purchased a Verizon Galaxy S4 and love it. Initially I planned on loading a custom ROM but now that it is rooted and I have removed much of the bloatware, I realize I don't want to give up most of these Touchwiz features. However, there are two simple issues I have never had with an android device before that are bugging me.
First of all, as I'm sure many of you have noticed, when the battery reaches a certain level, the brightness dims to the lowest level possible and you lose the ability to manipulate the brightness. Generally this happens when my phone has at least a couple hours of battery life remaining. Granted, a bright screen will reduce this time but I'd rather have some usable time than none, as the brightness level reaches a point where the phone is completely unusable if you are exposed to any sunlight at all. I have tried going through the settings as well as overriding the brightness with an app I have called Screen Dim to no avail. Has anyone had success brightening the screen at low battery?
Additionally, every time you plug in a 3.5mm stereo jack into the phone, it drops down the volume and usually forces you to acknowledge a dialog box prior to permitting you to raise the volume. This is a wonderful feature if you are completely oblivious and all you ever use are low impedance headphones. However, I use this almost exclusively on loudspeaker stereos, 90% of the time it is my car stereo while I am driving. Occasionally I use bluetooth headphones but I'm not dumb enough to blast that on full volume so this feature is pointless to me. So now here is one more button I have to read and push while in the act of driving in order to get music playing which is unsafe. Is there any way to circumvent this annoyance?
HI there guys.
Brand new to this forum.
I've searched for days and I'm unable to find a solution.
I'm experiencing a crackling or a distortion on phone calls at certain volumes. I noticed it with certain pitches in peoples voices it would cause a vibration in the ear speaker and some distortion in the sound. Kind of like the speaker is being over driven or has too much power going to it. It usually goes away if I turn the volume almost all the way down, but this is obviously not a practical option since I'm not always making phone calls in a dead silent room. The speaker phone works fine. This only happens when I'm using the earpiece. Is this normal? Is it related to the camera autofocus sensor rattle? Are the sound vibrations from a person's voice enough to set off the rattle? It's really annoying as I tend to make phone calls a lot and I don't like using speaker phone or a headset. Does anyone else have this problem?
From what I can tell, it happened and was normal in the S4. (http://forum.xda-developers.com/showthread.php?t=2280930).
Please help. Im deciding if i need to return it.
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fffft said:
It's too bad that you didn't describe it in more detail.. i.e. give us steps to replicate it. A recording of the distortion would have been helpful too. I haven't noticed what you describe but it sounds like the gain or auto gain is too high and your earpiece speaker is being overdriven.
There is a gain setting in the service mode menu but first you need to distinguish an app issue or possibly damaged speaker before messing around in the hidden settings. See if you can find an audio app that will give you a wider adjustment range for your system volume and gain.,
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Thank you for the reply.
If you go into the service menu, the go into the low frequency test. At 100hz and 200 hz there is a little bit of buzz in the headset reciever unless you really push it against your face (which i assume kind of tightens the spaces in the plastic and prevents whatever vibration in the speaker is occuring).
Hmm.. the vibration is akin to as if you were speaking into some cellophane wrap; like some film (maybe for waterproofing) is covering the speaker.
Oh. It's also worth noting that I cannot replicate the issue on Skype or Viber. Those sound crystal clear.
Bump. Anyone?
Is anyone else having problems with Bluetooth volume levels through your car speakers or any other Bluetooth speaker for that matter? My volume is verrrryy low through through the speakers at the "safety" level that u hit when trying to jack it up on the phone. I have to put my car speakers up to like 30. I didn't have to do with with Note 4. Low 20s was fine. The only way to make it louder without having to raise the car volume to 30 is to jack up the volume on the phone itself past the safety level. Then it gets louder i can lower the car volume a bit. Once again, didn't have to do this with Note 4. Its doing this with car, Powers Beats, and UE Boom.
Yeah I noticed the same on my bluetooth devices, Very quiet compared to other phones.
daz_2000 said:
Yeah I noticed the same on my bluetooth devices, Very quiet compared to other phones.
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It's weird. With the hands free in the car i think the volume is fine. I even think its sort of ok on the powerbeats 2. Playin music through the car or UE Boom though is really really low.
Having only received the phone Friday I've not had the chance to do much testing. But on the couple of times I took it in the car it was noticeably low playing music. Hopefully a software fix will correct.
I did a quick Google search and I've seen some people complaining about the Bluetooth dropping connections. I had it do once or twice. I've also had it not want to always stayed connected to my JAWBONE UP3 fitness tracker. I was watching it connect and disconnect nonstop a few times then eventually it stayed connected. Hopefully it's just a software issue that Samsung will fix and Verizon will release sooner than a year later. Some people have said the volume issue is a Marshamallow occurence but I don't know. ?
Ive not had any Bluetooth connectivity problems. Just the low volume which is not a major problem.
Bluetooth volume is pretty much the same as my LG G3, which I thought was low, so i'm used to it.
Just chiming in, coming from HTC M7 I definitely can tell the difference with low volume on S7E. I really had to crank up my car stereo volume when the phone is connected.
I had this problem both on the S7 edge and my previous Note 5. I just unpaired and repaired (three times with the edge) and finally the volume went back to the previous volume of my previous devices - weird, can't explain why but once the level settles it stays the same every time I connect. (I always set volume to full on the phone and then use the car stereo to control thereafter)
haven't had any disconnections myself, whether it's the smartwatch, car or wireless bluetooth speakers, however, when the phone's connected to the BT speakers, I did notice that even at full volume, it is very low compared to my former S6 edge.
I use Samsung Level U Pro Bluetooth Headset as well as JBL Bluetooth Speaker.
No Issues at all even streaming via Spotify and TuneIn Pro.
Sent from my SM-G935F using Tapatalk
Same here. But it seems to differ every time I reconnect a Bluetooth device. Little annoying since I have to readjust my headphones every time...
Gesendet von meinem SM-G935F mit Tapatalk
I can connect an iPhone to my car's bluetooth and it's extremely loud (35/40 and I can't handle the volume anymore) and if I connect my S7 I can hit 40/40 and talk casually over the music that's playing. My Note 5 did this, as well as my old Galaxy S6. Not sure why Samsung's bluetooth volume is so low/bad compared to iPhone. Not to mention there is almost no bass in the audio that's transferred.
Let's see if we can solve this once and for all. I've been experimenting and I am having some results. But does require an equalizer app. I am using Equalizer FX so I don't know how these steps work on other ones.
Open the app, click the three dots in the upper right > Settings > check "Global audio output mix" it's description reads, "Warning! It does not work for new devices. We do not recommend to use this feature. However this is the only solution for some players." (I am using YT Music)
After you turn that setting on, go back and click the middle tab "Effects" and you'll need to turn on "Loudness Enhancer" then use the slider to adjust it to your personal taste.
You don't even need to have the main page equalizer turned on. Just the main toggle needs to be on, the one right next to the three dots.
This part is just a little extra for those who don't understand the issue. SoundAlive maintains the media volume separately from all other device sounds. In the past we just used Package Disabler, turned it off, boom no more limited bluetooth music volume. Now it seems, it cannot be disabled with going rooted. *Flips table* You can easily demonstrate the issue by making sure you have setting on for the device volume synced with bluetooth volume. Connect to a bluetooth speaker, play a song, then plug and unplug an aux cable into the phone, you'll notice probably a 30% volume difference.