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G751 Imbalanced Sound Problem OFFICIAL SUPPORT THREAD (thread closed)

BRSxIgnition
Level 9
I've created this thread to condense the information we've gathered on this issue over the course of the old thread, which can be found here.

Current Fix Status:
Fix Here: https://rog.asus.com/forum/showthread.php?57462-G751-Imbalanced-Sound-Problem-FIX-IS-OUT!

Current Probable Issue Diagnosis:
Regular Signal instead of LFE (Low Frequency Effects) Signal to Subwoofer

Description (In different states):
Installed Drivers (Main Issue):

All speakers "working", but WITH massive imbalance issue.Sub greatly overshadows L/R Speakers & also distorts at volumes above 35%. Can hear sound very faintly coming from L/R speakers with ear pressed up against them.

Uninstalled Drivers (Temporary Fix):

Subwoofer (Only) is default playback device, with L/R Speakers being listed as a separate playback device. Left and Right Speakers working at full volume when selected as default playback device, with no sound
coming from subwoofer. Subwoofer can play audio when selected as default device, but distorts at volume levels above 35%, and does not work in conjunction with rear speakers in this configuration. (Either/Or Situation)

Reinstalled Drivers (Main Issue, Again):

Same effect as "Installed Drivers" every time. (All speakers "working", but WITH the imbalance issue. Sub greatly outpowers L/R Speakers & also distorts at volumes above 35%. Can hear sound very faintly coming from L/R speakers with ear pressed up against them.)

**NEW** Subwoofer Disabled (New Finding/Confirmation):

L/R Speakers can be heard perfectly fine when Subwoofer is disabled using the "Vbcmd_mute_int_woofer" Mute.exe file provided by MarshallR@ASUS on the ROG Forums. Cannot comment on volume level, but volume seems to scale fine without the subwoofer to overshadow it. This confirms the situation is a software issue, and all speakers are physically fine.


This issue is known to arise both brand new "out of box" units as well as on units where the OS has been cloned or reinstalled on a new drive and the ASUS Support Site drivers have been used. All G751 Models can have this issue.

Temporary Fixes:
As mentioned in the description, the speakers still work fine, proving that the issue is Software, not Hardware-related.

To get your Left & Right back speakers working correctly, follow the temporary fix guides below.

**NEW** TEMPORARY FIX - DISABLE SUBWOOFER:

  • Download and extract this RAR file.
  • Make sure you have the ASUS G751 Realtek Drivers installed. You can find them here.
  • Unzip Vbcmd_mute_int_woofer tool, and run Mute.exe.
  • If it returns a "Success!" message, your subwoofer should now be disabled.
  • If you ever need to enable your subwoofer again (when a fix is issued), simply unzip Vbcmd_unmute_int_woofer and run Unmute.exe.
  • Viola.


Enjoy your tinny-back speakers with no sub until we get a fix from ASUS. Until then, keep checking in here for updates, and let us know if you find anything!

Edit by cl-Albert 2/5/15: Very late thanks for looking into this and apologies for the delay, BRSxIgnition.
The new *.7432 G751 audio driver has finally been released, so this thread has been closed (to avoid 2 competing threads) and a new thread started.
If anybody is interested, please post your testing results or comments about this new audio driver at the post below. Thanks!

G751 Imbalanced Sound Problem FIX IS OUT!

https://rog.asus.com/forum/showthread.php?57462-G751-Imbalanced-Sound-Problem-FIX-IS-OUT!
278 Views
633 REPLIES 633

Edweird wrote:
@up

your comment was quite long and confusing and looks like not only i was a bit confused
Nevertheless your insight is educational 😉

Somehow, when realtek driver is uninstalled, windows lets you adjust tweeters and sub volume seperatly and actually recognize them as diffrent channels / devices
Start there... setting it as true 2.1, then let user adjust with said UI what tone ranges are played via tweeters and sub (like crossover function etc.).

- Re-posted on next page, edited. -

BRSxIgnition wrote:
Problem solved. Correct?
I'm not that sure to be honest, as we have at least one person who's happy with how his laptop sounds. Considering the fact that he has the same driver as we do, I really wonder if there is really no hardware problem with our units.

KoolASUS
Level 7
Well, just to compare, here is what what the Realtek Panel shows me for my G750JH : (using 7095 drivers and Win8.0)

45398

And this is my MaxxAudio setting :

45399

I had to lower the low freq sliders, otherwise the subwoofer is too "powerful".

Your problem (amongst others) on the G751 is that there is no subwoofer slider, right ? (I'm not sure if anyone posted a screenshot of his Realtek config panel)


EDIT :
yeah, I saw the G751 Realtek Panel. it seems quite different. Weird.

Edweird
Level 10
Yeah, it's been posted.
We don't have that slider and we need it. Also the freq changes suggested above.

x7007
Level 7
So what we need to do when the new driver arrive ? just to lower the Subwoofer volume ? Why we didn't have this problem with G73JH for example ?

Edweird
Level 10
Yeah, pretty much. EQ for the sub would be too much, though, they don't usually do that type of thing. Or at the very least the EQ/Volume changes we suggested and a volume slider for the sub and we can all go home.

Edweird
Level 10
Keep in mind I'm "happy" with how it sounds because I get a full-bodied sound and I think stereo on a laptop is next to useless.
The issue still very much exists. It's just not as bad for me and the only difference may just be a different speaker model or 2 numbers in a damn file somewhere that boost the input to the sub a bit more than they should.

---
My money is on all highs and some mids to tweeters, all lows and some mids to sub, input decrease for sub, input increase for system, volume slider for sub.

Have a good night. o7

---

BRSxIgnition
Level 9
-Reposting for visibility. Also Edited-

KoolASUS wrote:
This is my MaxxAudio setting :
-snip-

I had to lower the low freq sliders, otherwise the subwoofer is too "powerful".

Your problem (amongst others) on the G751 is that there is no subwoofer slider, right ? (I'm not sure if anyone posted a screenshot of his Realtek config panel)


Edweird wrote:
Yeah, it's been posted.
We don't have that slider and we need it. Also the freq changes suggested above.


escha wrote:

Somehow, when realtek driver is uninstalled, windows lets you adjust tweeters and sub volume seperatly and actually recognize them as diffrent channels / devices
Start there... setting it as true 2.1, then let user adjust with said UI what tone ranges are played via tweeters and sub (like crossover function etc.).


Yes. This is what we need from ASUS/MarshallR:


  • All High frequencies + 50-75% of Midrange frequencies to "Tweeters." (Left & Right Speakers)
  • All Low frequencies and Remaining Lower Midrange frequencies (25-50%) to Subwoofer.
  • Decrease Default Subwoofer Volume by 25% Minimum.
  • Slight Increase to Overall Volume. (*If Possible)
  • Enable/Release NEW UI with *previously missing* Subwoofer EQ Sliders + Seperate Volume Control for Subwoofer & Tweeters.


It's obvious by now that the drivers they're using just don't work. The UI and sliders to control the sub output are what we need most right now.

This way, all we'd need to do is set different Volumes for the Speakers/Sub. Bam. Problem solved.

Are we all in agreement?*
*Assuming we are, I will send a PM to MarshallR with this information so that they can give us updates on the status of the UI update and drivers.

BRSxIgnition wrote:

This way, all we'd need to do is set different Volumes for the Tweeters/Sub and use the Subwoofer sliders for the EQ. Bam. Problem solved.



Not to be argumentative, but I don't believe the speakers up by the hinge are supposed to be "tweeters"...I'm pretty sure they're just full range speakers.