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.
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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
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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.
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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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Click to collapse
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.
Related
Someone else posted that the standard issue items fall out of his ears. Mine too. and this is of course a problem when driving as you are constantly moving your head.
So I compared them with a good pair of Panasonic ones that don't fall out.
I think the problem is the width of the stem - it's at least twice as thick as the panasonic ones and therefore doesn't locate properly in the slot most of us have at the base of the earlobe. I think this is also why the sound is pretty crap compared to a good pair - they aren't close enough to the opening of the ear canal. If you apply very gentle pressure the improvement in bass is dramatic.
Anyway I also discovered that the mic/vol control/call switch thingy is a pop apart construction and anyone with some skill with a soldering iron ought to be able to solder a proper pair of buds in position. Unfortunately I don't have 'some skill with a soldering iron' so will have to find someone who does.
Why am I doing this I hear you ask ....'cos I'm peed off with blue tooth, in particular its mic pointing anywhere except where my voice is coming from. crappy mono sound ... no support for voice dialling, and constantly having to remember to charge up the bl**dy thing.
If I can get some decent buds on the standard kit, I'm then going to permanently remove the little rubber socket cover, work out a way of tidying the wires up (they seem to be made for someone with a head diameter the size of a very large beachball) .... then look for some way of activating the voice dialling via the two switches on the cable.
Mike
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.
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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
I don't know if it's just my Shift but the speakers are wired out of phase!
What I mean is, one side is wired +ve to negative giving an infuriating spatial effect and effectively cancelling out all the bass to mid audio (one is suckin while T'other is a pushin).
You can test this by ensuring all effects are turned off in Realtek Audio Manager and then adjust the volume balance to on side or the other and you will notice it sounds clearer with only one speaker running.
Display came off as per the disassembly sticky, changed connection on one and it sounds twice as good now, true stereo!
Its a difficult job so not advised for the faint hearted!
FYI
If you look at the two loudspeaker daughterboards, they lay in opposition, one facing up and one facing down.
The cables appear to be wired correctly but I'm wondering if some clever pcb designer thought to reverse the connections on one because of this layout.
Or maybe I just have one speaker miswired internally?
Who knows?
Carefully scrape away the potting compound over the connections of one of the speakers and using a small soldering iron, swap them over. It is too difficult to attempt to swap the connector side.
I will tell you one thing, when I select Loudness Equalisation under Sound Effects in Realtek Audio Manager, I can really use this for online radio and Slingplayer now!!
yes, i've known of this problem since i've first opened up my shift. It appears that all shift's sound like this and that the speakers are out of phase. It's a hardware designer fault. One soldering tool and some little practice should do the trick here. Simply reverse the polarity to one speaker.
facdemol said:
yes, i've known of this problem since i've first opened up my shift.
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Click to collapse
OH?
facdemol said:
It appears that all shift's sound like this and that the speakers are out of phase. It's a hardware designer fault.
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Click to collapse
Not had others to test it on myself..
facdemol said:
One soldering tool and some little practice should do the trick here. Simply reverse the polarity to one speaker.
Click to expand...
Click to collapse
Is there an echo in here??
BTW, thanks for the disassembly images.
Oh well, a problem shared is a... 'nother screw up by HTC!
or maybe this is a 'design feature' ?
Could some of you guys post a recording of your mic from the transformer. Like music or something. I just can't believe the horible mic quality
That's because it's not made for Drake to use in the studio. You can't really expect anything decent for a tablet at $400.00. You're looking at the wrong market, it's made for voice recognition and it works superb in combination with Google's Voice-related API's. Have you tried Voice Actions with this thing? It works near perfectly even with a ****ty voice.
It could use a boost though, the girlfriend has trouble hearing me when chatting. Ive thought about a plug in directional mic for that.
Just bought a $2 plug in mic for iphone that people said improved its capture of voice from a conference room. Hopefully it works because its about the size of a piece of candy, would be easy to carry for chatting.
The mic is, hardware-wise, the sole lemon for me on the Transformer. It's close to useless, because it is so insensitive.
Using Skype on the Transformer, I literally have to have the tablet within about a foot of me, and turned sideways so the mic points directly at me (and I can't see the screen). And it's not the specific tab -- I've got both 16GB and 32GB units, and the mic performance is equally terrible on both.
I'm hoping it turns out to be a firmware issue and the gain can be adjusted, either by Asus or a third party, because as-is it's simply not useful, and I can't really take advantage of basic OS features like voice search because of that. (And yes, Tubular, I've tried it. With my clearest possible voice, I have so far only been able to manage one successful search in total. 99% of the time it searches for completely the wrong thing, or nothing at all.)
knoxploration said:
The mic is, hardware-wise, the sole lemon for me on the Transformer. It's close to useless, because it is so insensitive.
Using Skype on the Transformer, I literally have to have the tablet within about a foot of me, and turned sideways so the mic points directly at me (and I can't see the screen). And it's not the specific tab -- I've got both 16GB and 32GB units, and the mic performance is equally terrible on both.
I'm hoping it turns out to be a firmware issue and the gain can be adjusted, either by Asus or a third party, because as-is it's simply not useful, and I can't really take advantage of basic OS features like voice search because of that. (And yes, Tubular, I've tried it. With my clearest possible voice, I have so far only been able to manage one successful search in total. 99% of the time it searches for completely the wrong thing, or nothing at all.)
Click to expand...
Click to collapse
Sounds like a defect: the mic is bad, but not that bad. Can you RMA it?
Or just up the gain in Skype. Anyhow, people have been telling me I sound like I'm in a vaccum when I talk on Ventrilo, but it is to be expected of a mic on a tablet.
knoxploration said:
The mic is, hardware-wise, the sole lemon for me on the Transformer. It's close to useless, because it is so insensitive.
Using Skype on the Transformer, I literally have to have the tablet within about a foot of me, and turned sideways so the mic points directly at me (and I can't see the screen). And it's not the specific tab -- I've got both 16GB and 32GB units, and the mic performance is equally terrible on both.
I'm hoping it turns out to be a firmware issue and the gain can be adjusted, either by Asus or a third party, because as-is it's simply not useful, and I can't really take advantage of basic OS features like voice search because of that. (And yes, Tubular, I've tried it. With my clearest possible voice, I have so far only been able to manage one successful search in total. 99% of the time it searches for completely the wrong thing, or nothing at all.)
Click to expand...
Click to collapse
You have a defective unit. The microphone in the Transformer is similar to that on low-end netbooks, etc. It's made to work for voice chatting and for voice search. It will not record high end audio... However, plug in mics work, iirc.
I'm getting my Asus Transformer today. Given some of the manufacturing defect concerns, I've been starting a list of things to checkout when I get mine. I guess it's worth while to check to see that the mic works, at least OK enough for voice commands.
Tubular said:
That's because it's not made for Drake to use in the studio. You can't really expect anything decent for a tablet at $400.00. You're looking at the wrong market, it's made for voice recognition and it works superb in combination with Google's Voice-related API's. Have you tried Voice Actions with this thing? It works near perfectly even with a ****ty voice.
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Click to collapse
Yep, it shines where my cappy fails! Nice voice recognition.
Sent from my GT-I9000 using XDA App
quarky42 said:
Sounds like a defect: the mic is bad, but not that bad. Can you RMA it?
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Click to collapse
dorino1 said:
You have a defective unit. The microphone in the Transformer is similar to that on low-end netbooks, etc. It's made to work for voice chatting and for voice search. It will not record high end audio... However, plug in mics work, iirc.
Click to expand...
Click to collapse
Thanks for the replies, but note that I have *two* Transformers (one early-production 16GB, one almost brand new 32GB) and both are identical in terms of recording levels.
With no case or anything to block the mic, Skype is usable so long as the microphone faces towards me and is within 1-2 feet, but if I turn the tablet so the screen faces towards me, the person I'm Skyping can no longer hear me properly.
Voice search is probably further complicated by my accent (somewhere between British, American, and Australian, and I use pronunciations from all three accents near-interchangeably). It is, in a word, useless. Well, perhaps worse than useless. But that's likely half down to the weak mic, and half down to my accent.
But I really don't think the mic in both of my units is faulty, tbh -- the audio is too similar in both, and they're not from the same production run.
Alright. I'm confused, though. Is it harder to hear in portrait (long end on top/bottom) or landscape? (short end on top/bottom)
Anyway, if you want better quality, attach a headset.
agree..the mic on the TF is ****...til I root, install chems kernel mod, install voodoo control, and volumn plus...now it just ok.. not good.
Sent from my Transformer TF101 using Tapatalk
dorino1 said:
Alright. I'm confused, though. Is it harder to hear in portrait (long end on top/bottom) or landscape? (short end on top/bottom)
Anyway, if you want better quality, attach a headset.
Click to expand...
Click to collapse
It's not portrait versus landscape, but rather, screen facing me, or screen facing to my left.
Imagine the TF sitting in front of you on a small table with dock attached, in netbook mode. Now imagine you've turned the whole thing 90 degrees so that the person sitting on the side of the table to your left can use it. That's the position I have to place the netbook in so that the mic can pick me up reasonably...
If I sit in front of the screen, the person I'm calling can barely hear me just two feet from my tablet (and as my long-suffering wife will tell you, I'm not a quiet speaker!) ;-) It's not specific to the person I'm calling -- I've tried doing a loopback test in Skype and even with the volume turned up all the way, I can hardly hear myself when sitting in front of the tab's screen.
Unfortunately I don't have the correct type of headset to test the mic jack. All my headsets either have separate mic / headphone cables, or a smaller size of jack.
Okay, I'm really pretty positive you have a bad unit, then. My mic at least works with the screen facing me!
Anyway, a coupler for dual 3.5mm headsets costs like 2 dollars
Thanks, guess I'll add it to my list of things to do -- call Asus and see if I need to get both tabs serviced...
That's immediately after I get my Creative speakers serviced. (Crackle on left channel.) And my Logitech mouse. (Left button double-clicks with a single click). And my Corsair power supply (started making a continuous ticking noise like a bearing's going).
*sigh* ;-)
has anyone tried using a bluetooth headset ? ive got a Nokia BH-109 paired with my TF, but no ones on skype for me to test it
dorino1 said:
You have a defective unit. The microphone in the Transformer is similar to that on low-end netbooks, etc. It's made to work for voice chatting and for voice search. It will not record high end audio... However, plug in mics work, iirc.
Click to expand...
Click to collapse
Why then would you include the ability to record hi-def video,with absolutely horrendously bad audio recording...I can't believe this Mic is not defective...RMAing back to Amazon for a new unit.
Chas
knoxploration is right. my tf mic is terrible. there's nothing wrong with it...just really hard to hear for people on the other end. I do the same thing and turn the tab to the side so i'm facing the mic. person on the other end hears me better but then they can't see me. i guess it's time to use one of those usb ports for a 3rd party mic. anyone tested any?
Friends obviously a LOT of Nexus 7 owners have complained about sound issues, from obviously defective units to the simple issue of volume being inadequate for use
My question is what is "normal" on this device? anyone know a db / sound-pressure at radius specification?
other than obvious noise through a speaker, how does anyone know if their unit is "normal" ?
cognus said:
Friends obviously a LOT of Nexus 7 owners have complained about sound issues, from obviously defective units to the simple issue of volume being inadequate for use
My question is what is "normal" on this device? anyone know a db / sound-pressure at radius specification?
other than obvious noise through a speaker, how does anyone know if their unit is "normal" ?
Click to expand...
Click to collapse
My speaker is defective, and in need of going out for repair/replacement, but the volume seems like it will be fine for my needs once the rattle/vibration is fixed. It only happens at certain frequencies, so I can still get a solid sense of the output level.
Trying to determine the exact db at a specific distance isn't going to do you much good, because it will be based on either the loudest frequency, or 1khz. The 1khz rating is somewhat reasonable to use, but what if there's a massive spike there (and on small speakers, there generally is). Say it could hit 95-100db at 1khz, it still will likely only hit about 5db at 40hz. See where I'm going with this?
I don't know, I could grab my spl meter, and run a whole series of tests at 1 meter in a quasi-anechoic environment (though it's really cold outside here), if you're really that keen on finding out precise measurements of the frequency output over the 20-20 range. Seems a little overboard for a 7" tablet though. I would consider the volume more than adequate for listening to the news, or voip calls, but there isn't a tablet that exists where I would be happy with the sound of the speakers for music.
Of course, I'm kind of picky about these things.
From what I see in the boards, there are three types of view points on the output.
1. Plenty good for normal use.
2. Terribly low for music.
3. Flat out broken, so you can only turn it up half way (the second is my current situation).
Also, don't forget that the speaker is in the back, so you'll have to keep it turned around or bouncing straight off of a hard surface, to get the full output to your ears. Some cases may also significantly reduce the output as well.
more questions: if we presume/conclude "there is a volume problem even when the speakers are not defective", then two follow-on questions:
1. is it JUST speakers?
2. combo of lousy speakers and a problem with the DSP/firmware/software/etc.... ?
I think it is 2 but I'd love to hear a root cause on the whole issue.
with SOME music sources I can get through the speakers a little bit louder response, at FULL volume max'd - than I can with MX Player on a video with the Player set on Volume Boost [200%].
in the case of MX Player, its basically worthless through the speakers both from a dynamics standpoint [obvious...] and just volume unless you are in a stone-quiet area and are craning toward the device to hear.... and you have acutely good hearing.
Then, if one is unconcerned about warranty: anyone have suggestions on replacement speaker that perhaps would help?
cognus said:
more questions: if we presume/conclude "there is a volume problem even when the speakers are not defective", then two follow-on questions:
1. is it JUST speakers?
2. combo of lousy speakers and a problem with the DSP/firmware/software/etc.... ?
I think it is 2 but I'd love to hear a root cause on the whole issue.
with SOME music sources I can get through the speakers a little bit louder response, at FULL volume max'd - than I can with MX Player on a video with the Player set on Volume Boost [200%].
in the case of MX Player, its basically worthless through the speakers both from a dynamics standpoint [obvious...] and just volume unless you are in a stone-quiet area and are craning toward the device to hear.... and you have acutely good hearing.
Then, if one is unconcerned about warranty: anyone have suggestions on replacement speaker that perhaps would help?
Click to expand...
Click to collapse
#2
When I connect the Nexus 7 to my car stereo inline, via the headphone output, I get mixed results. I generally have to crank the car stereo way up, which can cause voltage induction through the 1/8" to RCA connector, if I have the Nexus charging simultaneously.
Now granted, induction of this sort is not something that is a Nexus only problem, and has more to do with the quality of cable shielding. If I move the USB charger so that it doesn't line up with the headphone output wire, the problem is reduced.
However, the issue is more that the headphone output is somewhat inconsistent, so that means that some audio will require me to turn the stereo to a level where the inductance is moot, and sometimes I will have to turn up the stereo to the point where charging and listening to audio through the car stereo is just brutal. Of course, you weren't asking specifically about car audio, but it leads to my theory.
Now, here in lies why I think it's you're "#2". If it were purely hardware, there shouldn't be that great of a difference from the headphone jack, assuming relatively similar reference volumes from the source. So software would seem to be at play here, as well as hardware.
As far as the speakers go, I don't think you'll be able to replace the internals. They're a very awkward shape, which probably doesn't help, and there is very little room in there.
Your best bet would be to find out if there is an external speaker option which can easily work for tablets. I listened to an Ipad 4 last night, and it wasn't good either. I think you have to consider the size of these things. A speaker the size of your pinky nail, can only be asked to do so much. Trying to cram one the size of your thumbnail in there, won't do much more, and just wouldn't fit.
now we're talking real issues. thank you.
yes, compared to any of my other android or pc or apple devices this one is uniquely odd
all as you have noted. inconsistent, output device matters, etc.
I admit I'm skewed by the ipad Mini - if you get a chance, sample that in terms of speaker performance. I have not access to Ipad 4 in my shop.
in my case, there is no distortion that I can observe/detect with my ears - clear enough, but there's not much substance there, oddly except for notifications which are crystal clear at full volume, if not particularly loud [my ancient droid optimus is louder - obnoxiously so which is why I keep it on vibe].
bladebarrier said:
#2
When I connect the Nexus 7 to my car stereo inline, via the headphone output, I get mixed results. I generally have to crank the car stereo way up, which can cause voltage induction through the 1/8" to RCA connector, if I have the Nexus charging simultaneously.
Now granted, induction of this sort is not something that is a Nexus only problem, and has more to do with the quality of cable shielding. If I move the USB charger so that it doesn't line up with the headphone output wire, the problem is reduced.
However, the issue is more that the headphone output is somewhat inconsistent, so that means that some audio will require me to turn the stereo to a level where the inductance is moot, and sometimes I will have to turn up the stereo to the point where charging and listening to audio through the car stereo is just brutal. Of course, you weren't asking specifically about car audio, but it leads to my theory.
Now, here in lies why I think it's you're "#2". If it were purely hardware, there shouldn't be that great of a difference from the headphone jack, assuming relatively similar reference volumes from the source. So software would seem to be at play here, as well as hardware.
As far as the speakers go, I don't think you'll be able to replace the internals. They're a very awkward shape, which probably doesn't help, and there is very little room in there.
Your best bet would be to find out if there is an external speaker option which can easily work for tablets. I listened to an Ipad 4 last night, and it wasn't good either. I think you have to consider the size of these things. A speaker the size of your pinky nail, can only be asked to do so much. Trying to cram one the size of your thumbnail in there, won't do much more, and just wouldn't fit.
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