Galaxy Pro 12.2 easy headphone volume hack

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kradcliffe

Senior Member
Sep 28, 2010
288
119
Aberdeen
Superb headphone volume boost for the Note 12.2 and it's dead easy to do.

Rooted of course, go to System> Etc and open default_gain.conf

Modify the following lines in the first "headphone" section to the below:

{ "HPOUT1L input 1 volume", 50},
{ "HPOUT1R input 1 volume", 50},

Reboot and it's loud as hell with no distortion. It's set really low because of the usual health and safety crap.

I use ES file explorer, open it with ES Note Editor and remember in ES root explorer settings to select Mount R/W

Hope this helps!

Keith
 
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wingdo

Senior Member
Apr 28, 2010
499
99
Chicago
Pretty sure the Headphone hack doesn't affect the speakers.

Sent from my SM-P900 using Tapatalk
 

kradcliffe

Senior Member
Sep 28, 2010
288
119
Aberdeen
No, this is for headphone output only.

You can amend other parts of the file for speakers, but be careful you don't blow them.

Also keep a backup of the original file in case you screw anything up!
 

gtm55

Senior Member
Aug 13, 2006
318
22
Superb headphone volume boost for the Note 12.2 and it's dead easy to do.

Rooted of course, go to System> Etc and open default_gain.conf

Modify the following lines in the first "headphone" section to the below:

{ "HPOUT1L input 1 volume", 50},
{ "HPOUT1R input 1 volume", 50},

Reboot and it's loud as hell with no distortion. It's set really low because of the usual health and safety crap.

I use ES file explorer, open it with ES Note Editor and remember in ES root explorer settings to select Mount R/W

Hope this helps!

Keith

I can't find that file...
I have P905, rooted
 

gtm55

Senior Member
Aug 13, 2006
318
22
You need to have system root access and go back to device rather than the SD card

I have root access and I've searched for that file in system/etc as you said, as far as I know system folder can be found only on device; anyway I want to try something, could you, please, send me that file? I'll try to copy it to that location and see. Thank you!
 

ColBill

Senior Member
Apr 6, 2012
265
106
Anaheim, CA
Here is the molded file. Just unzip

Keith

Thank you Sir for providing the file. I have a P905 as well and could not find the file you described to modify.I will use attempt to use the file also depending on the results that gtm55 gets from that experiment. I did not find or identify the speaker file to hack either do you have that file as well.

Thanks again for sharing.
 

kradcliffe

Senior Member
Sep 28, 2010
288
119
Aberdeen
Can't understand why the P905 would be any different. All Samsung devices I've had in a while have had a similar file.

Keith
 

gtm55

Senior Member
Aug 13, 2006
318
22
My note 3 (SM-N9005) doesn't have it either, maybe lte devices have another configuration...

Sent from my SM-N9005 using XDA Premium 4 mobile app
 

Spere

Senior Member
Aug 7, 2013
491
183
I don't have it either on my SM-N9005 Note 3 or on my SM-P905 Note Pro.

Maby it's only on exynos based devices and not in SD.
 

esgie

Senior Member
Feb 17, 2013
332
179
Qualcomm based (mostly LTE) models have very different file structure - this is because Qualcomm provides System-on-a-chip solution including gpu/soundboard/radio devices, not only cpu, so every important component has to be configured in DIFFERENT way than elsewhere...
 

sonny24

Member
Jun 21, 2012
33
0
So has anyone figured out how to hack this yet???? ive been looking every where for a volume hack and this is the only thing ive found.
@esgie, you seem like the person who would know where this file would be for us to change, any solutions????
 

Spere

Senior Member
Aug 7, 2013
491
183
So has anyone figured out how to hack this yet???? ive been looking every where for a volume hack and this is the only thing ive found.

I haven't personally tested this, but what about opening /system/etc/mixer_paths.xml
Then finding this:

Code:
	<!-- Play Scenario  -->
	<path name="speaker">
		<path name="spk" />
		<ctl name="RX4 Digital Volume" value="83" />
		<ctl name="RX6 Digital Volume" value="83" />
		<ctl name="LINEOUT3 Volume" value="19" />
		<ctl name="LINEOUT4 Volume" value="19" />
	</path>

	<path name="headset">
		<path name="ear" />
		<ctl name="HPHL Volume" value="20" />
		<ctl name="HPHR Volume" value="20" />
		<ctl name="RX1 Digital Volume" value="77" />
		<ctl name="RX2 Digital Volume" value="77" />
		<ctl name="COMP1 Switch" value="1" />
	</path>

If I'm right, for headset "HPHL Volume" stands for left side volume and HPHR for right, and increasing these (to 25 or so??) you can increase headphone playback volume

For speakers it might be RX* Digital Volumes.

But like I said, I have not tested this so I can't know exactly what this do :)
 
Last edited:

esgie

Senior Member
Feb 17, 2013
332
179
Yup, been using it for a moment, even 88 seems clear and significantly louder.
Also, in the nearest neighborhood of above lines of xml file there are adjustable values for different scenarios like dock or bluetooth speaker etc.
I still recommend ViPERs audio btw
 

Spere

Senior Member
Aug 7, 2013
491
183
Yup, been using it for a moment, even 88 seems clear and significantly louder.
Also, in the nearest neighborhood of above lines of xml file there are adjustable values for different scenarios like dock or bluetooth speaker etc.
I still recommend ViPERs audio btw

In fact I can't find any way to increase bluetooth volume (I got SM-P905). With V4A I can boost it up a little, but not enough.
More about it HERE

If you know how to increase volume max level for BT playback any help will be appreciated :)
 

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  • 1
    Superb headphone volume boost for the Note 12.2 and it's dead easy to do.

    Rooted of course, go to System> Etc and open default_gain.conf

    Modify the following lines in the first "headphone" section to the below:

    { "HPOUT1L input 1 volume", 50},
    { "HPOUT1R input 1 volume", 50},

    Reboot and it's loud as hell with no distortion. It's set really low because of the usual health and safety crap.

    I use ES file explorer, open it with ES Note Editor and remember in ES root explorer settings to select Mount R/W

    Hope this helps!

    Keith
    1
    Here is the modified file. Just unzip

    Keith
    1
    Could you kindly provide me with the method you used to root the device? Tnx!

    Sry for OT

    CF Autoroot

    Sent from my SM-N9005