yashsingh1/xdaforums huggingface dataset:
[Nexus 4 General] yokken:
I found the DAC in the US SGS3 to be quite adequate for a mobile chipset, and seeing as the Nexus 4 uses the same one, I see no reason to think any differently. However, I do think the SGS3 has a more powerful amp in it. If your headphones are anywhere from 50 to 300ohm impedance, you will need an amp to get adequate volume (and sound quality) out of them. Obviously a good amp cannot make up for a poor source, but if your headphones are suffering from low power, an amp will help.

My Beyerdynamic Custom One Pros are 16ohm and I still have to turn my Nexus 4 up to ~75% volume to get them at a good listening volume. They sound great though. Obviously they sound better out of my Schiit Lyr, but my HD650s benefit more from the amount of power that bad boy puts out. I actually have to run my COPs through my E17 because the Lyr is so powerful (with a high output impedance) that it causes a low hissing on the COPs no matter the volume.
[Nexus 4 General] aceo07:
What hi-fi earphones are you using?
[Nexus 4 General] BaronInkjet:
See the supercurio link on 11-23 in this thread.
[Nexus 4 General] richteralan:
I am never a fan of RighMark Audio Analyzer from when it's written...long time ago.

But people like to compare numbers and RMAA shows some pseudo relationship between numbers and apparent audio quality.

I miss the days when you actually need to LISTEN TO THE ACTUAL DEVICE instead of staring at some numbers.
[Nexus 4 General] sexualrug:
I don't really want to get into a discussion on what kind of differences can be heard with what kind of headphones when connected to a phone.

High-end is a very general term and doesn't really mean anything to me. If the built-in amp cannot supply enough current to the low impedance headphones, voltage (and volume) will drop. Since the OP was complaining about volume, using an external amplifier is his solution, or otherwise getting a phone that has a better built in amp. He can easily verify if the volume drop is caused by impedance by plugging in a high impedance headset and seeing if the volume reaches his desired level.
[Nexus 4 General] BaronInkjet:
The frequency response chart pretty much exactly described my first impression when I listened to mine.

Another thing curious is that the stats are quite different from those of the other Qualcom SoC phones (some better, some worse -- including compared to new LG with identical hardware.) I would have thought it to be near identical; most of the previous ones are in a very tight range. Perhaps the difference is due to different parties testing (Supercurio/Anandtech vs. GSMarena)?

:confused:
[Nexus 4 General] noobdeagle:
im not sure how they test but the N4 gives some odd results, it changes alot based on the volume you set it to i believe they mention it in the anandtech review from memory, but it seems to click into different 'modes' at different volumes its kinda weird and probably software related.

wait and see what kernel devs cook up maybe.
[Nexus 4 General] abe in space:
If the volume is the problem, why are we talking about it in a thread about the DAC? The DAC has absolutely nothing to do with volume. That's the amplifier. Also, OP: what "hifi earphones" were you using?

Also, for anyone with volume issues, this should be the ideal accessory (assuming you like your headphones and you don't want to spend a fortune):

http://www.headphone.com/headphone-amps/fiio-e02i-rocky.php

Obviously, since it's designed for the iPhone 3GS-5, it's not likely it will control the source volume on Android (just its own amp's volume). But the mic & play/pause answer/hangup button will almost certainly work on the Nexus 4. It's not going to be the best amp in the universe, but it's certainly going to be the least obnoxious one, and the fact that Headroom is selling it means it's at least worth considering, since they simply don't sell outright junk.
[Nexus 4 General] techmatlock:
I'm just bought a cheap pair of JBuds Hi-Fi (http://www.amazon.com/gp/product/B000IG66VS/ref=oh_details_o00_s00_i00) so I would have a pair of earphones to go with my phone. Yes, I know they're not Hi-Fi IEM audiophile quality earphones, but the phone should still be able to amplify these earphones enough (they're 10 ohm). I have a FiiO E7 and really like it; I paired it with my Beyerdynamic DT 770 PRO 80s that I'm selling right now. When I listened to the earphones on my laptop without the amp, they sounded good. On the phone, it takes full volume just to be satisfactory. I know I can use the amp, but sometimes it's nice to carry light.
[Nexus 4 General] techmatlock:
Lower impedance would actually not have volume issues because it would take less power to turn the sound up.
[Nexus 4 General] techmatlock:
They can be cheaply made, but still power audio equipment to be satisfactory for new audio enthusiasts. I have the E7 and for the money, it is a huge improvement.
[Nexus 4 General] techmatlock:
Yeah I'm selling a Beyerdynamic right now and the earphones I'm using are 10ohms, so it has to be the phone's amplifier. This phone at least is a big improvement over the DAC in the HTC One X I owned before this so I can't complain too much. I want to look up those Schiit Lyr's, never heard of them. I'm more of a bass-oriented listener and I'm guessing the Schiits are open, high/mid clarity.
[Nexus 4 General] techmatlock:
For some reason, I had assumed the amplifier was built into the DAC chipset on the phone. It sounded logical and I hadn't done any research on audio component hardware.
[Nexus 4 General] twistedh:
Forget the fiio folks, get one of these if you have some spare cash.

http://www.sonicelectronix.com/item...yBB-v2.03-Altoid-Tin-Headphone-Amplifier.html

Altoid tin amplifier. You can even make your own for $20 if you have the patience and tools. Pretty good little amp, works great with a good set of headphones. You can also find them cheaper on eBay.

Plus you get something cool to talk about if someone asks you what it is :)
[Nexus 4 General] BaronInkjet:
I have never used these, but here is link, $29. They also have a different chip version that is $19.

http://www.ebay.com/itm/Altoids-Tin...nside-Bass-Boost-Function-AD823-/330782558825
[Nexus 4 General] manlisten:
Yeah, what bugs me is that it's actually a bit quieter than my old Sensation.

---------- Post added at 01:02 PM ---------- Previous post was at 12:55 PM ----------

Yeah, I've made one of these for myself. :D
[Nexus 4 General] mesasone:
There is no "pseudo relationship" here. Your source supplies an electrical signal to your headphones. The transducer in your headphones creates localized changes in air pressure which are picked up by your ears (sound). The motion of the transducer is determined by signal provided by your source. And RMAA measures the signal coming from your source.

If you believe snake oil salesmen when they say sound can't be measured, well... you know what they say about a fool and his money.
[Nexus 4 General] abe in space:
While sound can, in fact, be measured, there are elements of headphone sound quality we don't have specific measuring tools to gauge. If STN, frequency response, impedance and sensitivity were the whole ballgame that would be one thing. But they aren't. Two headphones that are virtually identical in all of those areas can still produce a wildly different sound. And while the things that cause those differences are still theoretically measurable, that doesn't mean we possess the tools to isolate them currently.
[Nexus 4 General] tehrules:
So if its not the DAC that is quiet, why is the amplifier used in the Nexus 4 so rubbish?

Its not even outputting loud enough for line level use in the car, and not only that it appears not to be isolated against interference from say a car charger, where as other phones (i.e my Atrix) and my ipod seem to.
[Nexus 4 General] richteralan:
Sure if RMAA is your thing.;)

---------- Post added at 12:27 PM ---------- Previous post was at 12:26 PM ----------

What I think its funny is that we often ignores the most important equipment: our ears. They are not created equal.;)
[Nexus 4 General] yokken:
The Schiit Lyr is a hybrid amplifier, pushing (if I remember correctly) 6W per channel @ 30ohms. It's extremely powerful. It's made for high-end headphones with high impedance.
[Nexus 4 General] 'cooleagle':
Kindly search before you start a new thread. You can continue this discussion in the existing thread on this topic linked below:

http://xdaforums.com/showthread.php?t=1962872

Thread closed.
[T-Mobile Samsung Galaxy Note II] zen0s:
Hello, I been noticing my auto brightness changing up and down too many times, so I went in phone test setting (*#0*#) under light sensor. I see my lux changing from 103 to 1700 even with slightest change of angle. I'm sure it will vary depending on room light conditions, but I was wondering if your note 2 does this as well?

Thanks for your time.
[T-Mobile Samsung Galaxy Note II] SkyPhone:
Mine is very smooth and goes up and down with angle or turning the local dimmer light up and down. Yours seems to be broken.
[AT&T, Rogers HTC One X, Telstra One XL] <ibrahim>:
I just unlocked my ATT HOX using couple different method and now it is rooted and I downloaded TWRP recovery but every time when I try to install new rom it will freeze when loading for the first time so i have to restore to stock rom which will work fine I tried CM10 and MIUI with no luck

any suggestion
[AT&T, Rogers HTC One X, Telstra One XL] superchilpil:
Flash the boot IMG in fastboot.

Search around there's instructions everywhere
[AT&T, Rogers HTC One X, Telstra One XL] <ibrahim>:
can u please explain further i am kinda new to android phones
[Nexus 4 Q&A, Help & Troubleshooting] Budo:
Just got my nexus 4 yesterday. Love it. But the phone is jumping wildly between 3g and hspa+ in a service area that my note 2 had no trouble holding a 4g signal. wondering if this is a Sim card issue, or if anyone else is having similar problems?
[Nexus 4 Q&A, Help & Troubleshooting] El Daddy:
Yes, that is how its supposed to work. Carrier branded phone just don't show the change in the status bar. It is functioning the exact same way.

Nothing to worry about.
[Nexus 4 Q&A, Help & Troubleshooting] neer2005:
Just a heads up, the N4 doesn't show a H+ logo but just the H.

Dial *#*#4636#*#* and make sure your network says HSPAP
[Nexus 4 Q&A, Help & Troubleshooting] Budo:
It's jumping between hspap and umts. Driving me nuts!
[Nexus 4 Q&A, Help & Troubleshooting] neer2005:
It will only switch to HSPAP when needed otherwise it will stay on umts in order to save battery life. No worries this is normal
[Nexus 4 Q&A, Help & Troubleshooting] El Daddy:
Your note 2 is doing the exact same thing. All gsm phones do this. It idles on 3g and when data is called it switches to hspa.
[Nexus 4 Q&A, Help & Troubleshooting] Prod1702:
T-Mobile makes the icon for both UMTS and HSPA+ the same icon that's why do you not see it change. Google makes the icons the way the network mode is.
[Nexus 4 Q&A, Help & Troubleshooting] Budo:
That makes sense! Thanks so much for the help.
[T-Mobile Samsung Galaxy S II SGH-T989] -Falco:
How to take screen shots using Jedi mind trick x1?
[T-Mobile Samsung Galaxy S II SGH-T989] arthurgreeeen:
i'm pretty sure just like every other cm9 or cm10 rom, holding vol down + power button. Alternatively, you can set the power menu's options as a screenshot in the settings.
[T-Mobile Samsung Galaxy S II SGH-T989] -Falco:
How do you do that? Volume down and power doesn't work
[T-Mobile Samsung Galaxy S II SGH-T989] ToStymiedBoar:
Make sure you hold it down long enough.
[Optimus One, P500, V General] edlan97:
My phone: Optimus V

ROM: Quattrimus AOKP ICS

Carrier: VM

I'm new the the forum so I'm sorry if this is in the wrong forum. I scoured the forums and Google for an answer to this to no avail. I used MiniTool Partition and I followed your guide on how to partition your SD card. I reflashed AOKP hoping it would do something but it didn't. When I go into Titanium Backup it has my partition listed. On the place where I got AOKP from, it says you cannot use any 2SD app (App2sd, link2sd etc) because Quattrimus will supposedly automatically realise your partition. How can I use my partition when the only way people say I can is via using a 2sd app? Thanks for your time and help.
[Optimus One, P500, V General] :
Try using cwm recovery to partition sdcard
[Optimus One, P500, V General] edlan97:
So it my ext2 memory should be added to my total internal memory?
[Optimus One, P500, V General] :
For the most part I would think so...an ext is an imaginary portion of a sdcard....ext2,3 and 4 could better be explained by Wikipedia or any Google search....if you want to partition a sdcard,use a custom recovery ie..clockworkmod recovery 5.0.2.7 or amonra 3.0.6, cwm partitions to ext4 by default while amonra partitions to ext2 by default but has options to upgrade to ext3 than ext4 in the recovery context menu....you can use a windows program to partition as well but your sdcard probably came preconfigured to NTFS and you need partition to FAT32
[Optimus One, P500, V General] luna84:
Install ClockworkMod and partition SD Card you will find the tutorials here also.

ext2/ext3/ext4 is a File System type and its a logical partition created in your SD card which is used and extension of your internal memory. Initially this File System is used in Linux since android is developed based on Linux so it uses the same file system.

For more information about partitions you can google. :o
[Nexus 10 Q&A, Help & Troubleshooting] mmhama2:
Alright so this is my first tablet/nexus experience. I've only used HTC products in the past and anyone that's been down that path knows the difference between s-off and unlocked. On HTC phones being unlocked means flashing the boot partition through fastboot where s-off will allow you to flash any partition through recovery. How does it work on a nexus?
[Nexus 10 Q&A, Help & Troubleshooting] yumcax:
Yep, there is no S-OFF with nexus devices so you are able to flash system, recovery, etc. after unlocking.
[Galaxy Note GT-N7000 Q&A, Help & Troubleshooting] Daman1997:
Hi all, so I'm currently looking for a way to go back to stock Touchwiz (4.0.3) from CM10.

I'm currently running CM10 and i do have a Nandroid backup from when I was on Touchwiz (and running PhilZ safe kernel), but the thing is I've been running CM10 for a few months and have a lot of new data stored on my phone.

So instead of backing up anything new and just restoring my backup, could i just flash a stock firmware through ODIN or CWM on top of CM10? Or if I tried that would I have to wipe anyway?

Thanks any help appreciated. :)
[Galaxy Note GT-N7000 Q&A, Help & Troubleshooting] nokiamodeln91:
going back from custom to stock causes boot loops and a wipe will be necessary. so better do a nandroid backup of th current rom, then when in stock rom, use tb to restore data using the nandroid backup.
[Galaxy Note GT-N7000 Q&A, Help & Troubleshooting] kaush666:
Ok this thread is dead but I will have to revive it now because I wanna do the same thing.

I have been on Cm10 and wanted to go to Alliance ROM today. So like a complete idiot I flashed pre-rooted KJ1 gingerbread ROM from Dr.Ketan over my CM10 and got stuck in a boot loop. Luckily had a nandroid backup and now restoring as I type.

What is the correct process to go from CM to stock GB or ICS?

Any and all help is appreciated :)

Thanks in advance.

Cheers,

Kaushik

EDIT: I flashed the pre-rooted GB ROM because I wanted to do a full wipe and then flash over to stock ICS and then to Alliance JB ROM.
[Galaxy Note GT-N7000 Q&A, Help & Troubleshooting] nokiamodeln91:
Either flash using PC odin. after flashing if on GB, boot into recovery and do a factory reset. If on ICS, install a safe kernel (eg,Philz) and reboot recovery and do a factory reset,

OR

Flash a custom GB or ICS rom using recovery after all wipes and formats (system, data, cache)
[Galaxy S III I9305 (4G LTE + 2GB RAM) Q&A, Help & ] donsemaryy:
hello guys . i have a very important question about flashing a new rom.. well i have rooted my s3 from months and now i want to flash it by a leaked rom (4.1.2) so i can get options of note 2

My question is what i should do before flashing it .. should i backup my apps..or system data (my first time to flash and am afraid to damage my phone ) thanks in advance:)
[Galaxy S III I9305 (4G LTE + 2GB RAM) Q&A, Help & ] Stony-D:
There is for the i9305 / S3 LTE no leaked 4.1.2
[Galaxy S III I9305 (4G LTE + 2GB RAM) Q&A, Help & ] Lookin4somehelp:
I believe that leak is for the I9300 which is incompatible with the I9305. What I'd suggest if its the note 2 features your after, either wait untill December 5th when I believe the offical Jelly bean 4.1.2 for the I9305 is to be released. Or install a custom rom for instance the Pandorum or Ripper roms
[Galaxy S III I9305 (4G LTE + 2GB RAM) Q&A, Help & ] nateboi81:
Unless its in the specific I9305 thread I would check it carefully. Flashing a I9300 rom is a very bad idea :P
[Nexus 7 Q&A, Help & Troubleshooting] Skyline969:
Is it possible at all to root my Nexus 7 (on Android 4.2 JOP40C) without having to flash a custom recovery or something else that would cause me to lose all of my data, and would allow me to continue to receive normal OTA updates? I understand that an OTA update would likely remove my root, that's a non-issue if I can re-root in a similar way.
[Nexus 7 Q&A, Help & Troubleshooting] veeman:
It's not the rooting part which erases the data., it's unlocking the boot loader which does that. But an unlocked boot loader is necessary to root.

My advice is that you create a backup using one of the toolkits or using TitaniumBackup and then go ahead and begin the rooting process. After that's complete you can just restore the backup.

Sent from my Nexus 7
[Nexus 7 Q&A, Help & Troubleshooting] scott_doyland:
Titanium backup requires root in the first place.

Unlocking boot loader does a factory reset so save any personal pictures etc you have, copy them to your PC using one of the many methods available.

The apps you can just red-download but you will loose the data from them, whether that's a concern depends what data you have in your apps that you can't manage to save or recreate.

Once the bootloader is unlocked then flash a custom recovery, I use twrp. Then you can do a nandroid backup before you flash the files needed for root just in case it screws up.

If an OTA removes root then you can just reflash the root files.
[Nexus 7 Q&A, Help & Troubleshooting] ezas:
My Backup Pro is a backup program that works without being rooted. It's also dead easy to use and its free.
[Nexus 7 Q&A, Help & Troubleshooting] Saturn1217:
I was curious about this too.

I don't care about losing data when unlocking the bootloader.

BUT I would like to know if it is possible to root the nexus 7 but not have a custom recovery?

I just want to be able to use apps that require root access but I remember from my old phone that with custom recovery there were a whole lot of things (like doing a factory reset using the settings) that couldn't be relied upon. I would like to avoid this if possible. For the moment I have no interest in custom roms.

But every time I search for this no one can give a clear answer.

So Yes or No? Can I have a rooted nexus 7 but stock recovery?

And if possible do you know how? I'm on a mac so a non-toolkit method would be amazing :)
[Nexus 7 Q&A, Help & Troubleshooting] Ashin:
Will rooting remove any data from an unlocked bootloader?

I reflashed my device and accidently left it unlocked... well seems like it was lucky maybe, since I want to root now
[Nexus 7 Q&A, Help & Troubleshooting] scott_doyland:
Unlocking bootloader wipes ALL data.

Flashing custom recovery does not wipe any data.

Rooting, ie flashing root files, does not wipe any data.

You must have an unlocked bootloader to install custom recovery.

You must have an unlocked bootloader to root.

You can have have a custom recovery and root.

You can have a custom recovery and no root.

You can have root and no custom recovery.

NOTE NOTE NOTE

The easiest way to obtain root is by flashing root files via custom recovery.

If you have an unlocked bootloader then you may as well flash a custom recovery and take a full backup of the device via the custom recovery before you root in case you mess something up. There is no reason to not have a custom recovery. It allows you to also perform a 'factory reset' by wiping certain parttitions and makes rooting MUCH easier as you flash the root files via the custom recovery.
[Nexus 7 Q&A, Help & Troubleshooting] kroegerama:
If you want to root, you have to unlock the bootloader first (as said before):

> fastboot oem unlock

After that, you can boot a custom recovery (not flash,

the normal recovery will be back again after a restart

)

> fastboot boot [recovery.img]

And when the recovery has started, you can mount /system and push the necessary files:

> adb push su /system/xbin

> adb push Superuser.apk /system/app

After that, you should set the correct permissions:

> adb shell

(now you are in your device's shell)

> chmod 06755 /system/xbin/su

> chmod 0644 /system/app/Superuser.apk

> exit

And now just reboot:

> adb reboot

Enjoy :D

Edit:

The custom recovery can be found here: http://clockworkmod.com/rommanager

The su and Superuser.apk files can be found here: http://xdaforums.com/showthread.php?t=1538053 (just extract the two files from the .zip, I dont like those installer scripts :D)
[Nexus 7 Q&A, Help & Troubleshooting] JohnRM:
Interesting thread. I also posted something similar but was ignored, so never got a answer.

So, to anyone with the answer, PLEASE,

Is there ANY way to backup the WHOLE device, apps included, BEFORE any bootloader unlocking + rooting is done ?

I have googled this question for the past week and cannot get a definitive answer, some saying yes with xx-app, some saying it's not possible because the hidden folders are not accessible to a non-rooted device.

I have purchased many apps on google play store, I don't mind downloading most of them again but I am worried if I wipe the device whether I will be allowed to download from the play store, or whether I will get asked to pay for them again - don't want this.

Plus, most of my games are HUGE, GTAIII, NFS Most Wanted, Asphalt 5,6,7, etc.. and these take a very long time to download again via wifi.

So please, a simple yes or no would suffice. If I have to bite the bullet then so beit, but I have quite a lot to lose if I do, so you can see why I need to get a definitive answer and then do some thinking. Would have rooted 2 weeks ago when I bought the Nexus 7 32Gb, but hindsight is a good thing when you know how.
[Nexus 7 Q&A, Help & Troubleshooting] kroegerama:
Yes, there is the adb backup command:

> adb backup –apk –shared –all –f C:\path\to\backup.bak

However, this will not backup your SMS&MMS. But there is the tool SMS Backup & Restore, which can do this job ;)

Edit:

Here is another Thread with a more detailed description:

http://xdaforums.com/showthread.php?t=1420351
[Nexus 7 Q&A, Help & Troubleshooting] JohnRM:
Many thanks. :good:
[Nexus 7 Q&A, Help & Troubleshooting] scott_doyland:
You can re-download from the playstore again without repaying. Just as you would re-download if you were using a new device and/or additional device.

You can download one app to multiple devices, is have an app installed on multiple devices at the same time, but you only pay once.
[Nexus 7 Q&A, Help & Troubleshooting] ned.jeffery:
Thank you so much for the info! this helped me a lot. Except one thing didn't work for me. Did you mean "adb push su /system/bin" and "chmod 6755/system/bin/su"??? I tried what you said and discovered that /xbin is not a directory.

BTW if you can't be bothered doing it manually, CMW recovery has a nice "install from sideload" feature.