my friend, which i converted to windows mobile, has recently purchased the O2 Atom. His device emits a high pitched noise from the speaker. he says its unbearable in quiet environments.
I searched this forum for a new rom but looks like he's got the latest. I noticed there is a speaker patch that reduces the speaker output to 100db, would that solve the issue?
Also anyone located in the US ever have to send an O2 product in for repair, I want to know what your experience was like and whats the process.
Thank you.
noise from speaker or from the screen?
speaker - try to download patch from seeo2.com - volume speacker limiter.
screen - reflash the ROM, if you will have the same problem, send to sevice center...
kropotov said:
noise from speaker or from the screen?
speaker - try to download patch from seeo2.com - volume speacker limiter.
screen - reflash the ROM, if you will have the same problem, send to sevice center...
Click to expand...
Click to collapse
Noise from speaker(which for talk on phone) - I have the same problem.
The patch and upgrade of ROM doesn't help. In my observations, this noise is in audio path. You can see big hill(hump) on spectrum analyzer in area of 18(or 16) kHz if connect its to the output for headset(headphones)
But this noise is not permanent(in my device any way). When I bought the ATOM, I didn't hear this noise(or didn't pay attention). I heard this noise after a month(or about). I've tryed to find a solution - no way. One day I noticed that noise is gone. I was update my ATOM to the latest ROM and I noticed that noise is came back....
My ATOM's in service center now. I've point out that it's one of the deffects of device. Second deffect - fast discharge of accum.
А теперь по-русски
Короче, это проблема в аудиотракте. Если подцепить осциллограф к выходам на наушники, то можно будет увидеть горбик на 18(или 16 кГц). Чем лечится - не знаю. Писк вроде пропадал, т.е. как купил - не слышал, потом услышал, потом опять пропал свист, потом появился...так и отдал в СЦ, указав как одну из неисправностей....
счас жду, када починять....батарейку жрать стал не по-деццки....
hearing things..
slyshay, a tu slychayno gvozdikom ne kovuryalsa v yshax kogda "vse eti zvyki" poyavilis? Ny a esli delo ne v etom, to mozhet tebe k babke kakoy nibyd sxodit, mozhet "vukachaet"?
Ny a esli seryezdno, to poxozhe eto vse delo ili v rome ili v ystanovlenom softe kotoruy kak to menyaet reg settings na audio output. Pochemy ya tak dymau, potomy chto search pokazal chto mnogie imeuyt eti problemu izza softa.
какие многие? ни одного отчета не было. ссылки дашь?
search
google.com
The high pitched noise is faulty LCD screen according to O2 and MPS. My Atom has been to service centre 3 times I have owned the Atom for 7 months and it has been at service centre for most of that. Finally O2 replaced the handset. This problem cannot be fixed! even the replacement Atom has the unbearable noise...Selling the rubbish and buying an HP...Dont waste your money or time on the Atom (Im sure you dont like a handset that sounds like loud mosquito) sell it and buy the HP
aleksandr
Ny a esli seryezdno, to poxozhe eto vse delo ili v rome ili v ystanovlenom softe kotoruy kak to menyaet reg settings na audio output. Pochemy ya tak dymau, potomy chto search pokazal chto mnogie imeuyt eti problemu izza softa.
Click to expand...
Click to collapse
you are mistaken. it'ts not software priblem. It's hardware problem. many sources in google sad this. :lol:
noises
"
--------------------------------------------------------------------------------
The high pitched noise is faulty LCD screen according to O2 and MPS. My Atom has been to service centre 3 times I have owned the Atom for 7 months and it has been at service centre for most of that. Finally O2 replaced the handset. This problem cannot be fixed! even the replacement Atom has the unbearable noise...Selling the rubbish and buying an HP...Dont waste your money or time on the Atom (Im sure you dont like a handset that sounds like loud mosquito) sell it and buy the HP "
Click to expand...
Click to collapse
This is very much true. It is known problem as well. Though this problem accrues due to condensators that are located under the LCD causing the interference with LCD. At the same time, when it is determined by the spectrum analyzer that sound output through headphones output is higher at 16-18 kHz as described in original posting by nomad_irk, that eliminates faulty condensators and speakers. Unless the high pitch noise nomad_irk hears is not through headphones or speakers but actually from the device it self. The sound output is controlled by sound distribution module (hardware) and by the sound controller drivers like sdnll.dll and etc. Therefore makes it possible to adjust the sound quality by 3rd party software. So the obvious steps here are, 1st to determine the source of the signal, whether it it’s the noise interference from the condensators under the LCD or the audio output egg. headphone jack or speakers and it’s a sound distribution hardware module problem (which is unlikely) or it’s the drivers (it would be the rom problem) or it’s a 3rd party software that messes with sound output. 2nd. If it’s the condensators that cause interference, the only way to fix this problem, is just to get rid of the device. Exchanging the device will not help. It’s the combination of incompatible LCD and condensators used that cause the frequency interference. On the other hand, if it’s the software and drivers problem, just either try resetting the device, (to get rid of problem software) and if that doesn’t help, perform a rom upgrade and hope that drivers are updated.
By the way, HP and O2 Atom are the same devices.
Re: noises
aleksandr said:
"This is very much true. It is known problem as well. Though this problem accrues due to condensators that are located under the LCD causing the interference with LCD. At the same time, when it is determined by the spectrum analyzer that sound output through headphones output is higher at 16-18 kHz as described in original posting by nomad_irk, that eliminates faulty condensators and speakers. Unless the high pitch noise nomad_irk hears is not through headphones or speakers but actually from the device it self. The sound output is controlled by sound distribution module (hardware) and by the sound controller drivers like sdnll.dll and etc. Therefore makes it possible to adjust the sound quality by 3rd party software. So the obvious steps here are, 1st to determine the source of the signal, whether it it’s the noise interference from the condensators under the LCD or the audio output egg. headphone jack or speakers and it’s a sound distribution hardware module problem (which is unlikely) or it’s the drivers (it would be the rom problem) or it’s a 3rd party software that messes with sound output. 2nd. If it’s the condensators that cause interference, the only way to fix this problem, is just to get rid of the device. Exchanging the device will not help. It’s the combination of incompatible LCD and condensators used that cause the frequency interference. On the other hand, if it’s the software and drivers problem, just either try resetting the device, (to get rid of problem software) and if that doesn’t help, perform a rom upgrade and hope that drivers are updated.
By the way, HP and O2 Atom are the same devices.
Click to expand...
Click to collapse
I've opened the ATOM. There's no capacitors that can make interferencing. Any way, under LCD there's shield covered elements(and capacitors too). 2nd: If there's interferency, why i can registred it on headphones output?
The truth is out there (c) X-Files
А теперь по-русски:
Нет там таких ёмкостей, которые бы свистели. В любом случае, элементы(и ёмкости) закрыты экраном, сам дисплей тоже обклеен фольгой - нечему там интерференсить. Свист явно в звуковом тракте(о чём я говорил выше). Если бы была интерференция, то свист был бы только слышим, но не регистрировался бы на выходе на гарнитуру анализатором спектра.
Приедет мой зверёк из москвы, я его специально открою и сфотаю, чтобы все увидели, о чём я говорю
Re: noises
aleksandr said:
"
--------------------------------------------------------------------------------
This is very much true. It is known problem as well. Though this problem accrues due to condensators that are located under the LCD causing the interference with LCD. At the same time, when it is determined by the spectrum analyzer that sound output through headphones output is higher at 16-18 kHz as described in original posting by nomad_irk, that eliminates faulty condensators and speakers. Unless the high pitch noise nomad_irk hears is not through headphones or speakers but actually from the device it self. The sound output is controlled by sound distribution module (hardware) and by the sound controller drivers like sdnll.dll and etc. Therefore makes it possible to adjust the sound quality by 3rd party software. So the obvious steps here are, 1st to determine the source of the signal, whether it it’s the noise interference from the condensators under the LCD or the audio output egg. headphone jack or speakers and it’s a sound distribution hardware module problem (which is unlikely) or it’s the drivers (it would be the rom problem) or it’s a 3rd party software that messes with sound output. 2nd. If it’s the condensators that cause interference, the only way to fix this problem, is just to get rid of the device. Exchanging the device will not help. It’s the combination of incompatible LCD and condensators used that cause the frequency interference. On the other hand, if it’s the software and drivers problem, just either try resetting the device, (to get rid of problem software) and if that doesn’t help, perform a rom upgrade and hope that drivers are updated.
By the way, HP and O2 Atom are the same devices.
Click to expand...
Click to collapse
Yes the Atom and HP are the same device but not one HP has been reported with the noise, so HP or Quanta have corrected this. O2 have far too many Atoms and Exec's distributed and probably in stock to fix or even bother fixing them, I have had two Exec's and two Atom's replaced and the replaced devices still squeal. I am going to contact Consumer Protection Agency with all the details I have collected pressing the main issue of distributing a faulty product knowingly. They cannot deny it, the high pitch noise is definately bad for your hearing when your ear is pressed against the device, so unless O2 give me a full refund I will do my best to make life very difficult for them. Anybody else interested in getting refunded for a faulty crapy product that cannot be fixed can PM me to discuss it further.
Re: noises
homer285 said:
aleksandr said:
"
--------------------------------------------------------------------------------
This is very much true. It is known problem as well. Though this problem accrues due to condensators that are located under the LCD causing the interference with LCD. At the same time, when it is determined by the spectrum analyzer that sound output through headphones output is higher at 16-18 kHz as described in original posting by nomad_irk, that eliminates faulty condensators and speakers. Unless the high pitch noise nomad_irk hears is not through headphones or speakers but actually from the device it self. The sound output is controlled by sound distribution module (hardware) and by the sound controller drivers like sdnll.dll and etc. Therefore makes it possible to adjust the sound quality by 3rd party software. So the obvious steps here are, 1st to determine the source of the signal, whether it it’s the noise interference from the condensators under the LCD or the audio output egg. headphone jack or speakers and it’s a sound distribution hardware module problem (which is unlikely) or it’s the drivers (it would be the rom problem) or it’s a 3rd party software that messes with sound output. 2nd. If it’s the condensators that cause interference, the only way to fix this problem, is just to get rid of the device. Exchanging the device will not help. It’s the combination of incompatible LCD and condensators used that cause the frequency interference. On the other hand, if it’s the software and drivers problem, just either try resetting the device, (to get rid of problem software) and if that doesn’t help, perform a rom upgrade and hope that drivers are updated.
By the way, HP and O2 Atom are the same devices.
Click to expand...
Click to collapse
Yes the Atom and HP are the same device but not one HP has been reported with the noise, so HP or Quanta have corrected this. O2 have far too many Atoms and Exec's distributed and probably in stock to fix or even bother fixing them, I have had two Exec's and two Atom's replaced and the replaced devices still squeal. I am going to contact Consumer Protection Agency with all the details I have collected pressing the main issue of distributing a faulty product knowingly. They cannot deny it, the high pitch noise is definately bad for your hearing when your ear is pressed against the device, so unless O2 give me a full refund I will do my best to make life very difficult for them. Anybody else interested in getting refunded for a faulty crapy product that cannot be fixed can PM me to discuss it further.
Click to expand...
Click to collapse
Hi homer285,
I too have the same stupid noise. Mine is at the service centre now for the 4th times since I bought it back in late Feb. What a big mistake in buying that crap!!! If you are contacting Consumer Protection Agency and need another person with the same issue, let me know. I am also thinking about contacting them myself.
bad sound in atom exec
I have the sam problem and i think there is no way to fix it .if you are contacting Consumer Protection Agency and need another person with the same issue, let me know. I am also thinking about contacting them myself.
You saying it is 18-20KHz? Which one?
How on earth did you measure it with a spectrum analyser (and a microphone?).
Will try with my atom and my lab's spect analyser if you could tell me how ...
I am still thinking its just a LED chargepump cap...
Thx..
G
Related
Hi All,
I bought an XDAII about 2 weeks ago and am very please with it, however, when I make and receive calls, the sound seems to be very muffled. The people I call also comment that I sound very muffled too. Is there something wrong with it, or is this usual ? I was also wondering if a Radio Stack upgrade may cure this problem.
Here are my current versions etc.
ROM Version 1.03.00 USA
ROM Date 09/24/03
Radio Version 1.05.12
Protocol Version 1337.12
Any help appreciated.
Thanks,
Rob.
unfortunately it doesnt.
i know what you mean . . . but i upgraded my radio stack to 1.10 and it's still the same sound
i just hope it's just a setting of how the audio is decoded by the radio (sort of like the nokia setting you can turn on and off (at the expense of battery power) forgot what it's called.
cuz if it's not that, then it just means it's got a lousy speaker hehehe
hehe.. Thanks for the reply mate. At least I'm not the only one with a muffly speaker n mic
Ta,
Rob.
no prob :wink:
i think everybody has the same problem, only they just dont think it's a biggie (or aren't as picky as us) since the audio STILL is intelligible anyways
Has anyone else encountered a problem when either using the phone normally or through the speakerphone option, there is a slight rattling when the volume's set high?
This is quite annoying if common and is something other speakerphone phones seem to suffer from.
Anthony
XDA2 not as good as it looks
Hi there
I have my XDA2 for 5 months and I´m in love with it, whenever one of my freinds mention its faults I get upset :?
But, we all know that the XDA2 is FAULTY big time, sofware not well developed yet, and yes, we think twice about buying software (same apply to hardware)
I have learn how to live with all this, still think that the XDA2 is a top tool for work and everyday life and I hope that other machines come to the market to compete, then we will get value for money
Bad Sound Quality
Hi,
I also bought a MDA II (T-Mobile Germany) some weeks ago. I really like it, but I also think that the sound quality is not the best. There are two effects that annoy me:
1. I can hear a high pitched beep in the speaker, always when the device is switched on (not only when talking on the phone but always if it is switched on). It is not very loud, but I can hear it clearly in quiet environment (my ears are still too good I think...).
2. The sound has to much "base" and to less "treble". Well, you can understand the person on the other end but this is definitly the worst sound quality I ever had on a phone.
This is the only thread I could find discussing this problem, leading me to the conclusion that either most phones are good and I got a bad one or most people don't bother if a very expensive phone sounds like a $5 toy...
Is there a chance to get a better sounding replacement phone or should I learn to be happy with it?
Regards,
Oli
Sounds Rubbish
Hi guys
i noticed the sound isn't as good as the XDA I when playing mP3's or MPG files on it.
does anyone know if there is anything that can be done to correct this ??
other than buying a set of speakers to go with it, doesn't seem much else ! ;(
any solution for this???????
I've got the same problem, however I've noticed that the sound is clear when I use the XDA 2 with my tomtom navigator the voice instructions are very clear, its strange + when I use the speaker phone the other party can hardly hear me.
sorry to tell you this, but i have got mine repaired and strange that they changed the motherboard to get rid of this problem, means it is a mother board problem not speaker or software.
Re: Bad Sound Quality
ruiner said:
Hi,
I also bought a MDA II (T-Mobile Germany) some weeks ago. I really like it, but I also think that the sound quality is not the best. There are two effects that annoy me:
1. I can hear a high pitched beep in the speaker, always when the device is switched on (not only when talking on the phone but always if it is switched on). It is not very loud, but I can hear it clearly in quiet environment (my ears are still too good I think...).
Click to expand...
Click to collapse
The high pitched beep is caused by the poor filtering of the power electronics of the background lightning of the touchscreen. It is worse if the light is set to low. If you set it one or two notches higher, the beep sound will go away (or at least you won't hear it anymore).
hi i have a problem with my jamin. i cant hear any music in it neither i can use speakerphone. others is fine. i hard resetted the device but still same. plz help me to solve this problem
same thing hapen to my dopod. the speaker just lost it yesterday.
seems like the speaker interconnect is loose. had to sent it for service. poor workmanship I'd say.
not the connector issue...
more like a poorly designed circuitry/power management for the speaker..
either that or the speaker specs werent proper for the power supplied..
either way..
apparently, this problem was inherited since the magician ..
same speakers or same circuitry for the prophet...
Hi Everybody,
My Magician recently developed an annoying problem and I wonder if anyone had this already:
The internal Mic occasionally goes to a very low sensitivity, i.e., when talking on the phone I have to scream so that the other person can hear me. This is also valid when recording a voicememo - on the playback I hear mostly static with a faint voice in the background.
Next, when using the headset, the voicememo records Ok but when talking on the phone, the other guy ears mostly the electromagnetic noise of the GSM (a loud "RRRRRRRRRRR").
I have noticed that this effect of the headset is started when the battery voltage goes below 3.4V and, as i connect the charger, the effect disapears.
I cannot relate the effects on the internal mic with the battery charge though; it seems to be more random....
It definitely is Hardware...but could it be solved maybe with a new battery?!
Any hunches?
Thanxs!
that is actually aproblem faced by all magician users. mine too worked just fine for firts 6 months then this annoying problem arose.
others could barely hear me.
i tried every sort of registry tweak, cleaned the mic and other thing but still nothing fruitful happened.
one fine day in an attempt to fx the internal mic myself i broke it (there is hardly any service backup for o2 devices here in New Delhi)
since then either i don't use it or use it with a bluetooth handsfree. no problems with bluetooth handsfree.
Yep, That´s right: No problem with the Bluetooth, but is just annoying to have to worry about carrying the BT device all the time and being always worried about its battery state - not to mention that I already lost one...
My guess is that the Analog-to-Digital Mic Chip is failing, or some part of the Mic circuit before that, or even the power suply to the said Chip....
That's just a lot of guessed troubleshooting to do without the knowledge of the elecronic circuit itself.
BTW, I just read your post about the mic problem - Did you have the problem as well with the wired headphones?
Thanks.
phantom201 said:
Yep, That´s right: No problem with the Bluetooth, but is just annoying to have to worry about carrying the BT device all the time and being always worried about its battery state - not to mention that I already lost one...
My guess is that the Analog-to-Digital Mic Chip is failing, or some part of the Mic circuit before that, or even the power suply to the said Chip....
That's just a lot of guessed troubleshooting to do without the knowledge of the elecronic circuit itself.
BTW, I just read your post about the mic problem - Did you have the problem as well with the wired headphones?
Thanks.
Click to expand...
Click to collapse
no! i don't face any problem with bundled earphones or even nokia stereo earphones or a bt handsfree even if i talk from a distance.
problem is only with internal mic.
i would suggest not to try anything yourself on the board. u may ruin ur device like me.
and yes, its annoying to carry tha bt set all the time. thats why i seldom use this devica anymore...i use it only as a mp3 player paired with sony mdr-e808 earphones and equalizer app. the sound is very crisp and punchy.
phantom201 said:
Yep, That´s right: No problem with the Bluetooth, but is just annoying to have to worry about carrying the BT device all the time and being always worried about its battery state - not to mention that I already lost one...
My guess is that the Analog-to-Digital Mic Chip is failing, or some part of the Mic circuit before that, or even the power suply to the said Chip....
That's just a lot of guessed troubleshooting to do without the knowledge of the elecronic circuit itself.
BTW, I just read your post about the mic problem - Did you have the problem as well with the wired headphones?
Thanks.
Click to expand...
Click to collapse
ok whose ready for a big surprise?
you're very right! its a hardware fault
i have 100% jumper solution
call +92-300-3812680 if you know a bit of soldering
fsl13 said:
ok whose ready for a big surprise?
you're very right! its a hardware fault
i have 100% jumper solution
call +92-300-3812680 if you know a bit of soldering
Click to expand...
Click to collapse
come on buddy! if you explain it here using images, u'll help so many users having the same problem.
pls consider.
we all need your help at he moment.
Mic Prob
mariner_heart said:
come on buddy! if you explain it here using images, u'll help so many users having the same problem.
pls consider.
we all need your help at he moment.
Click to expand...
Click to collapse
Faisal is very right buddy......it is purely jumper problem. I attached a snap of my Cell for you.......See the arrow... It is mic and we have to put the black color jumper on it.... Actually what happen with us.... we don't pay much importance to that jumper... there is a tiny whole on that jumper, put that whole on the head of mic so that our voice waves travel inside the jumper and go into mic.
It is my own experience that I put wrong side of jumper on mic and got panic three times . Thanks Faisal.....
ali786 said:
Faisal is very right buddy......it is purely jumper problem. I attached a snap of my Cell for you.......See the arrow... It is mic and we have to put the black color jumper on it.... Actually what happen with us.... we don't pay much importance to that jumper... there is a tiny whole on that jumper, put that whole on the head of mic so that our voice waves travel inside the jumper and go into mic.
It is my own experience that I put wrong side of jumper on mic and got panic three times . Thanks Faisal.....
Click to expand...
Click to collapse
DUH!
nooooooooooo!
i meant a pure jumper solution silly!...
the jumper solution is a quoted wire or in combination solded n jumped from the main sources or the parts in between to make a proper current flow in case of any resistance in between, loose or broken connection.
unfortunately the solution i was supposed to provide was scheduled that night is delayed due to some very sudden technical reasons. And for this i really apologize.
ill try to be as prompt as i can but the time cannot be defined so please forgive me for bringing hope and than delaying it. i know exactly how it feels but hey... patience can be more fruitful
Be Good! Be Well!
Mic Problem
fsl13 said:
DUH!
nooooooooooo!
i meant a pure jumper solution silly!...
the jumper solution is a quoted wire or in combination solded n jumped from the main sources or the parts in between to make a proper current flow in case of any resistance in between, loose or broken connection.
unfortunately the solution i was supposed to provide was scheduled that night is delayed due to some very sudden technical reasons. And for this i really apologize.
ill try to be as prompt as i can but the time cannot be defined so please forgive me for bringing hope and than delaying it. i know exactly how it feels but hey... patience can be more fruitful
Be Good! Be Well!
Click to expand...
Click to collapse
You are right Faisal......... but I told everything which I demonstrated...... And I solved the problem.... It can be possible that other people also did the same mistake which I did.... They can check their mic cover, as long as you can’t provide them any solution. Right??
For the main problem of the buzz noise when calling: I had it too. And it became gradually louder, more louder. And then (it became REALLY insopportable: when in call even the main speaker emitted that noise, and considerably loud) my phone resetted. It decided to not woken up unless I took the Sim out, and that was the end of my phone (the "phone" part: I used it as an expensive mp3 for quite a while). The noise was so loud that also attempting to connect to the carrier caused soft reset. Searching around I discovered that noise to be related to RF leakage.. you have been warned folks
Many guys are looking for a method of recording both sides of voice during a call. But it seems that HTC mobile phones including X1 Xperia don't support internal voice recording. Someone said that's hardware limitation. The only way to recording both sides voice is by turning on speaker.
I got an idea about fix this issue by adding simple circuit to X1 Xperia. Please see the attached file. It's a circuit diagram. As illustrated in the diagram, the signal of other side is introduced by a capacitance. Two voices, one from you, the other from the participant of your call, are mixed together and go to the ADC(analogue/digital converter).
Someone may be concerned about the self-excitation by the feedback. I think the phone works well even if you turn on the speaker, that would introduce the feedback. So the phone will work well if you introduce the signal via electronic form.
I haven't implemented this idea. Guys, please help to review this idea, and make the solution more applicable.
Thanks All!
(Diagram updated, potentiometer added.)
Lol
Maybe implement it and let us know I have a feeling that even with the decoupling capacitor it's still going to cause horrendous feedback. The speaker output will probably still excite the microphone and since the microphone is going to be d.c. shifted into the positive because of the lack of a negative supply. And that's without even knowing for certain the circuitry used here.
It's very interesting idea to make a fix for internal voice recording for X1. Usually speakerphone handsets are factory equipped with some circuitry which avoids unwanted feedback. I doubt that X1 doesn't have one.
You can always experiment with any cheap old phone to check if your idea has a chance to work. Maybe some potentiometer should be used to adjust depth of the feedback.
alias_neo said:
Maybe implement it and let us know I have a feeling that even with the decoupling capacitor it's still going to cause horrendous feedback. The speaker output will probably still excite the microphone and since the microphone is going to be d.c. shifted into the positive because of the lack of a negative supply. And that's without even knowing for certain the circuitry used here.
Click to expand...
Click to collapse
I don't quite understand what you mean. The capacitor between the speakerphone and microphone isn't a decoupling capacitor. It's a coupling capacitor for audio signals. It let audio signals go through and blocks direct current.
And could you explain more about negative supply? As far as I know, symmetrical power supply isn't common in nowadays electric appliance with battery. It seems that self-excitation has nothing to do with negative supply.
Thanks neo and Macko for your reviewing. Experimenting on an old phone is really a good idea! But it is still difficult since we don't know the exact circuitry inside X1.
It's really necessary to have potentiometer to control the amount of signal to be introduced. Thanks Macko!
so phones which cost nearly as much as a laptop cant do smthg that cheap phones can do?
this is a very necessary feature and learning that its hardware limitation is quite disappointing.
what about presenting this idea to htc so they can learn smthg
Nocturnal310 said:
so phones which cost nearly as much as a laptop cant do smthg that cheap phones can do?
this is a very necessary feature and learning that its hardware limitation is quite disappointing.
what about presenting this idea to htc so they can learn smthg
Click to expand...
Click to collapse
X1i is far more expensive than most laptops in discount stores and yes, seems that X1 can't do what SOME of cheaper phones do.
Dear HTC and SE: this is very very ugly dysfunction that XPERIA can't record calls properly! My wife's Nokia E51 does it perfectly. SHAME.
BUT caution please!
I've just done some research and found quite good working software solution of this issue. The problem is that signal from speaker isn't directly provided to DAC, so X1 just records what the mic "hears" from speaker, but if we use headphone or bluetooth headset, then recorded speech volume is far too low. But by applying some dynamics filtering on signal we can achieve desired gain of low volume part.
Here are instructions for volunteers:
- download and install some audio editor, for example CoolEdit
- download your recording from phone, open it in editor; low parts of wave are words of interlocutor
- apply a dynamic filtering as shown below:
- here are the results; as You see, low volume speech is gained by lots of dB, while your speech is almost untouched
My idea is to write some application working in background (as a service) which automatically applies such dynamic filtering DURING recording of a call. This is the best approach, but of course the same results can be reached by postprocessing.
Macko:
How is the voice quality after processing? I think it has some limitations.
sunshaking said:
Macko:
How is the voice quality after processing? I think it has some limitations.
Click to expand...
Click to collapse
Both sides are a bit distorted, which is unavoidable (dynamic processing distorts spectral envelope of signal) but acceptable. Of course all background sounds from opposite side are also gained, so do not talk to somebody who's mowing grass in the backyard
very interesting macko....if u can make such an app for X1..it ll be very useful and popular
Just downloading SDK and getting to work.
makro it is impractical to be forced to process all records. very bad for HTC
sunshaking said:
I don't quite understand what you mean. The capacitor between the speakerphone and microphone isn't a decoupling capacitor. It's a coupling capacitor for audio signals. It let audio signals go through and blocks direct current.
And could you explain more about negative supply? As far as I know, symmetrical power supply isn't common in nowadays electric appliance with battery. It seems that self-excitation has nothing to do with negative supply.
Thanks neo and Macko for your reviewing. Experimenting on an old phone is really a good idea! But it is still difficult since we don't know the exact circuitry inside X1.
It's really necessary to have potentiometer to control the amount of signal to be introduced. Thanks Macko!
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This is exactly my point. Sorry I wasn't clear. As you say, no negative supply because we are running off of a battery. The signal itself is still an A.C. signal, so, in order to fit it within the confines of our supply it has to be DC shifted into the positive region yes? My point was that this DC level shift will be filtered by the capacitor for the reasons you gave, and so distorting the signal.
http://www.aray.cn/archives/3246
Studying how to disassemble X1.
I've disassambled my X1, but I can't find the microphone.
Here are two photos that might have micrtophone. I guess the microphone is attahed on the right side. But I really can't find it.
Haven't taken my X1 apart yet, but from the outside, the microphone is in the small hole/dent under the "OK" hardware button.
Anyone?
Has anyone found a solution to this hardware problem yet? I've been trying a hundred things with no success.
I have a noise problem, I don't think it's quite the same as previously posted noise problems.
I get a hissinh/static noise from the phones speaker (on the back) and from headphones. It is only happening while the phone plays sound (and some seconds later). Every time I up or down the sound with the volume keys, there are noise coming out of the speaker for some seconds. Please report if you have the same issue, especially eith headphones.
I could live with the speaker-noise, it's not that big a deal.. What's worse is it is in the headphones. I have a quite low impedance set of in-ear plugs from creative (I am able to hear the hard drive spinning up in my old mp3-player, but no constant noise) Crap. I want to use the phone for music listening. Question is: software or hardware related? Using JF 1.51 ADP for the record
I hope it is hardware related - I bought mine off ebay, allthoug brand new and everything, I don't know how I would go about getting it fixed/a new one with no receipt. Shipping it back and forth to England isn't really tempting either.
It's not just you, it's piss-poor rf isolation on the audio outputs. Listening with bluetooth doesn't solve the issue either as bluetooth has its own noise.
Yeah, I have yet to listen to a decent pair of BT headsets.
So this is a known problem, and it's definitely a HW issue? The fact that it's only there when sound is played, and is also there with a headset (where shielding around connectors is not and should not be a problem at ALL) made me hope this was softwar related. Argh, what to do then? The sound quality despite this seemed prety decent, although a headache today prevents me from really listening to music and say for sure. Shame.
*Pondering refund options.*
Any chance of isolating around the connector and fixing this, if it is "airborne" caused noise, or will the noice enter the equation before the connector (cabling, sound chip)?
I will try with a relatively high impedance headset (sennheiser 555) and see if it is better there. But can't take them on the bus anyway. But a couple of Ωs could always be added somewhere along the cable and might do some good. Have to have the sound at the lowest levels with the in-ears. Maybe a software fix to lower the volume output will help? Or won't it, if RF noise is the cause?
red: I will buy this item and hope it helps. And will look into lowering the volume output when using headphones as well. Should be possible (atleast it usually is with tweaks in WinMo.)
I have similar problem with HTC Magic: forum.xda-developers.com/showthread.php?t=633035
Here is one more post regarding HTC Jade: forum.xda-developers.com/showthread.php?t=463365