FM Radio is Quiet. Can it be made louder? - Touch Diamond2, Pure Q&A, Help & Troubleshooting

On my Compact V, I was quite looking forward to using the radio. But whilst outdoors it is barely audible.
When I play the inbuilt MP3 player, the volume is much louder. I’ve tried various stations, but they are all equally low in volume. Reception seems to be fine. I only listen to BBC Radio4 (sorry!).
Any ideas?

mpathan said:
On my Compact V, I was quite looking forward to using the radio. But whilst outdoors it is barely audible.
When I play the inbuilt MP3 player, the volume is much louder. I’ve tried various stations, but they are all equally low in volume. Reception seems to be fine. I only listen to BBC Radio4 (sorry!).
Any ideas?
Click to expand...
Click to collapse
The radio has it's own volume, just use the volume control on the side while the FM radio is on and displaying.

harolds said:
The radio has it's own volume, just use the volume control on the side while the FM radio is on and displaying.
Click to expand...
Click to collapse
Unfortunately that doesn't help either, volume is far too low. I've been looking for a solution all over the place already too... found nothing that worked.
.

TinTin said:
Unfortunately that doesn't help either, volume is far too low. I've been looking for a solution all over the place already too... found nothing that worked.
Click to expand...
Click to collapse
What happens on the display when you use the volume buttons? Because I have installed a cab on my phone which caused the volume control in the FM radio to stop working.

Yes i am surprised that nobody talk about this problem already.
It is true that the fm radio is low.
And no the radio does not have its own volume.
It is the same as the system volume.
In order to be able to hear something you must set the volume almost to the maximum.
When you receive a sms, it rings so loud into your headphone.
I tried to HD tweak but no result......

hvilly said:
Yes i am surprised that nobody talk about this problem already.
It is true that the fm radio is low.
And no the radio does not have its own volume.
It is the same as the system volume.
In order to be able to hear something you must set the volume almost to the maximum.
When you receive a sms, it rings so loud into your headphone.
I tried to HD tweak but no result......
Click to expand...
Click to collapse
My phone's FM radio has it's own separate volume. Like I said before, that it's possible that you installed something that caused the seperate volume to stop working.

harolds said:
My phone's FM radio has it's own separate volume. Like I said before, that it's possible that you installed something that caused the seperate volume to stop working.
Click to expand...
Click to collapse
Before I installed anything on y phone, the volume had been low. I have installed tomtom7, however i dont think that is the cause.
Like I say, when I play an mp3 file, the volume is loud. At first I thought it may be to do with the reception, but all the stations are the same (there is a marginal difference is the reception is very good).
Thanks
Max

harolds said:
My phone's FM radio has it's own separate volume. Like I said before, that it's possible that you installed something that caused the seperate volume to stop working.
Click to expand...
Click to collapse
Have you tried switchiong the volume control in manila over to
Home>Settings>Sound>Single Volume>Off / On

smadger said:
Have you tried switchiong the volume control in manila over to
Home>Settings>Sound>Single Volume>Off / On
Click to expand...
Click to collapse
Why my FM radio's volume works just fine, it will play louder then my ears can take.

smadger said:
Have you tried switchiong the volume control in manila over to
Home>Settings>Sound>Single Volume>Off / On
Click to expand...
Click to collapse
I have tried that. Makes no difference :-(

harolds said:
What happens on the display when you use the volume buttons? Because I have installed a cab on my phone which caused the volume control in the FM radio to stop working.
Click to expand...
Click to collapse
And which CAB was that ? My volume control inside the radio works, but the maximum is by far too low

Try this metod that works on my D2
with a reg editor modify:
HKLM\Software\HTC\FMRadio\FMPlayer
Dword: "Volume" change the value that you see, with this in decimal"4294967295" save and go on FmRadio...works? ok thats all for me naturally.

Dr asphalt said:
Try this metod that works on my D2
with a reg editor modify:
HKLM\Software\HTC\FMRadio\FMPlayer
Dword: "Volume" change the value that you see, with this in decimal"4294967295" save and go on FmRadio...works? ok thats all for me naturally.
Click to expand...
Click to collapse
Mine was set to 43260 (Dec), I put your value and started the FM Radio, but the max volume did not increase
I quit FM Player and noticed the Volume RegKey was changed to 6180 (Dec) , obviously after I quit FM Radio.
.

Ok...6180 that's happen also fo me, but now work normally.
you can only try this http://forum.xda-developers.com/showthread.php?t=534362 is the only chance you have to encreas the overal audio.
I admit that is a bad audio bug also for ring sound, i mean, i hope solve in a future rom revision.

TinTin said:
Mine was set to 43260 (Dec), I put your value and started the FM Radio, but the max volume did not increase
I quit FM Player and noticed the Volume RegKey was changed to 6180 (Dec) , obviously after I quit FM Radio.
.
Click to expand...
Click to collapse
hey,
i got the same problem in several different roms. i put provided value and it did make worse for me.
has anyone resolved problem with quiet fm radio?
regards,

Mine is still low, not found a solution.

I totally agree its very low

Related

Volume reduction after 1.40 install

Hi. I searched and found a few posts mentioning a reduction in phone volume and speakerphone volume after the 1.40 install but no partciular comments. I also noticed a significant drop in volume and after testing with some older software it only appears to happen in 1.40
Is there any way of altering the maximum volume or is this just part of 1.40 ?
Thanks,
Stuart.
Get used to it.
Besides, I can't honestly believe it is good for such a small speaker to be putting out the volume it used to be capable of.
Just reflash your ROM again. Mine problem resolved after 3rd reflash.
TheLastOne said:
Get used to it.
Besides, I can't honestly believe it is good for such a small speaker to be putting out the volume it used to be capable of.
Click to expand...
Click to collapse
Its not only about the speakers, headphones also have low volume as a result of this upgrade..
Now I encoding all movies and tv shows with increased volume, that i need to watch on it.

How To Increase The Volume Of The Kaiser??

its really to low to listen music!! i have the original rom fr of the kaiser help please
Not loud enough, how about the earphones?
Assuming you've mastered the volume slider or jog wheel on the side (see the instruction manual for further details on that) and it's already at maximum, the next step is to change the device you're listening through. I use the Kaisers speaker to output the TomTom Navigator 6 instructions when cycling around with the phone mounted on my bicycles handlebars, thats loud enough for me even in most traffic. If I plug in the original earphones though, when playing music on the train, I can get it very loud (unpleasantly so). If it's just the speaker volume you want to crank up, I suspect thats a hardware limitation of the tiny speaker and you'd risk damaging it even if there was a way to increase the signal going to it. Personally, I'm pleased the speaker isn't 'to' loud, it makes it less likely that yobs will want to create noise pollution with their 'music' from these devices on public transport!
bowow said:
its really to low to listen music!! i have the original rom fr of the kaiser help please
Click to expand...
Click to collapse
I agree with you the volume is low period, either it be from headphones or internal speaker. Instead of wasting your time like Flying KiWi (dude, whats with your post, you just typing junk to get a post count up?) I will offer some suggestions.
I use TCMP (or CorePlayer) to play mp3's and there's an actual volume booster in the options. in core player to find this option, goto menu, tools, preferences, select page, audio, adjust Preamp accordingly.
Give it a shot, I think you will be pleased..
I Agree TCPMP has an excellent Audio / Preamp volume Increase that works excellent. Sure would be great if someone could create an app that would do the same to anything you use.
I use Resco Radio and the volume is too low at Max. I work in a factory where there's grinding going on with the compressor kicking in every few mins.
I end up having to switch to TCPMP to get enough volume to hear. I've Tried HTC Equalizer / Booster but it does nothing. Maybe someone could tweak it so it Does Work?
zcink said:
I Agree TCPMP has an excellent Audio / Preamp volume Increase that works excellent. Sure would be great if someone could create an app that would do the same to anything you use.
I use Resco Radio and the volume is too low at Max. I work in a factory where there's grinding going on with the compressor kicking in every few mins.
I end up having to switch to TCPMP to get enough volume to hear. I've Tried HTC Equalizer / Booster but it does nothing. Maybe someone could tweak it so it Does Work?
Click to expand...
Click to collapse
Well, are you sure your mp3 songs have been ripped to a good volume? Do they play at normal/loud levels in any other MP3 player (I'm assuming they're encoded in mp3 format) It's no use trying to crank up the volume with HTC Equaliser/Booster etc if your original song files are of low volume/quality...Then you'd have to use a Sound Normaliser/Booster like MP3 Gain on your PC etc to first boost and normalise the volume before you try and squeeze your device for every volume gain you can get...
i owned the htc wisard before and with the bridage_gain_headset.cab i had no pb to fix the volume up but by now i cant listen music without hearing everything around me :'(
Moe5508 said:
Well, are you sure your mp3 songs have been ripped to a good volume? Do they play at normal/loud levels in any other MP3 player (I'm assuming they're encoded in mp3 format) It's no use trying to crank up the volume with HTC Equaliser/Booster etc if your original song files are of low volume/quality...Then you'd have to use a Sound Normaliser/Booster like MP3 Gain on your PC etc to first boost and normalise the volume before you try and squeeze your device for every volume gain you can get...
Click to expand...
Click to collapse
I understand your post but I was talking about streaming radio from Resco Radio. Has nothing to do with .mp3 files.
bowow said:
i owned the htc wisard before and with the bridage_gain_headset.cab i had no pb to fix the volume up but by now i cant listen music without hearing everything around me :'(
Click to expand...
Click to collapse
Do you have that .cab? Can you post it? would like to fool with it. Thanks.
this is the bridage
Thanks! I'll let you know how or if it works out.
okay thx
Just one question. What exactly does this .cab do?
Its tiny -- only 1 kb. I installed it but not sure what it does. Does it just kick up the volume / registry setting?
I opened a few media players and it does seems louder but not sure. I will fool around with it more later.
Please Advise. Thanks.
yes change the registry setting..
zcink said:
I understand your post but I was talking about streaming radio from Resco Radio. Has nothing to do with .mp3 files.
Click to expand...
Click to collapse
Apologies, I totally misread your post. I use Resco Radio as well and my volume is OK there and I actually have to turn it down quite a bit...What ROM are you running? Maybe let's start there...I'll post my Resco Radio settings (screenshot) later if that helps...
yes maybe its because of this rom i run the originale french rom from htc...
Moe5508 said:
Apologies, I totally misread your post. I use Resco Radio as well and my volume is OK there and I actually have to turn it down quite a bit...What ROM are you running? Maybe let's start there...I'll post my Resco Radio settings (screenshot) later if that helps...
Click to expand...
Click to collapse
Hi, I'm just using the Stock Rom TMO HTC Wing. Only thing I've done is change the pagepool to 4mb, which improved things alot. Resco Radio volume is fine except when I'm at work and all the machinery and compressors are running, which is like all day. I just need a little bit more, not much. TCPMP does it with preamp volume boost.
I can change the knob to one that has 11 instead of 10.
zcink said:
Hi, I'm just using the Stock Rom TMO HTC Wing. Only thing I've done is change the pagepool to 4mb, which improved things alot. Resco Radio volume is fine except when I'm at work and all the machinery and compressors are running, which is like all day. I just need a little bit more, not much. TCPMP does it with preamp volume boost.
I can change the knob to one that has 11 instead of 10.
Click to expand...
Click to collapse
Well, you do know stock ROMs have been proved (SPB Benchmarks and others) to perform sub-optimally compared to "cooked" ones in many respects (file transfer speed, write speed etc inter alia)...I'm not suggesting you go out and start "flashing" cooked ROMs just to solve this but maybe a different stock ROM to start with...coz we're really trouble-shooting here to find out if it's a hardware (HTC Wing + resco Radio) or software (stock sound drivers, TCMP application etc) related limitation...
Moe5508 said:
Well, you do know stock ROMs have been proved (SPB Benchmarks and others) to perform sub-optimally compared to "cooked" ones in many respects (file transfer speed, write speed etc inter alia)...I'm not suggesting you go out and start "flashing" cooked ROMs just to solve this but maybe a different stock ROM to start with...coz we're really trouble-shooting here to find out if it's a hardware (HTC Wing + resco Radio) or software (stock sound drivers, TCMP application etc) related limitation...
Click to expand...
Click to collapse
Yeah I hear ya. The only reason I don't wanna flash it is because its Warrantied by T-Mobile for one year. They've already replaced it two times. If I flash it, I'm on my own. After one year is up, yes, I'll start messing with it.
My Old Audiox 5600 worked much better once I flashed it from WM 2003 to WM5.
What about max level via a2dp?
ko0ky said:
I agree with you the volume is low period, either it be from headphones or internal speaker. Instead of wasting your time like Flying KiWi (dude, whats with your post, you just typing junk to get a post count up?) I will offer some suggestions.
I use TCMP (or CorePlayer) to play mp3's and there's an actual volume booster in the options. in core player to find this option, goto menu, tools, preferences, select page, audio, adjust Preamp accordingly.
Give it a shot, I think you will be pleased..
Click to expand...
Click to collapse
Does anyone know if this affects overall sound volume. I listen to music on my Tilt via A2DP and the sound volume is so low it's almost unusable.

MP3s too loud...

Hi guys, actually I haven't searched for this problem (doesnt work somehow :/)
so don't lynch me
I have one little problem with my xda diamond - it's too loud.
When I'm listening to music with the standard headset (haven't bought a 3,5mm adaptor yet) I'm always on the last bar and even sometimes that seems to loud (yeah, I have to admit, my ears are pretty sensitive - but that was never a problem with other mobiles). I'm afraid that if I buy that 3,5mm socket and use it with my standard headphones it will get even louder, because their output is very high....
I tried to reduce the volume in the options - I can reduce it to 2-3% which is optimal. But sometimes I get this horrible bug, that some songs are on 2-3% volum WAY louder than on 10 or 20%. Just imagine, you listen to a song and when it ends the next song just starts like "BAMBAMBAMBAM" and your ears are completly numb
Somebody knows how to fix this, or can recommend me a different player?
Would be very grateful
Cheers,
Kashik
Kashik said:
Hi guys, actually I haven't searched for this problem (doesnt work somehow :/)
so don't lynch me
I have one little problem with my xda diamond - it's too loud.
When I'm listening to music with the standard headset (haven't bought a 3,5mm adaptor yet) I'm always on the last bar and even sometimes that seems to loud (yeah, I have to admit, my ears are pretty sensitive - but that was never a problem with other mobiles). I'm afraid that if I buy that 3,5mm socket and use it with my standard headphones it will get even louder, because their output is very high....
I tried to reduce the volume in the options - I can reduce it to 2-3% which is optimal. But sometimes I get this horrible bug, that some songs are on 2-3% volum WAY louder than on 10 or 20%. Just imagine, you listen to a song and when it ends the next song just starts like "BAMBAMBAMBAM" and your ears are completly numb
Somebody knows how to fix this, or can recommend me a different player?
Would be very grateful
Cheers,
Kashik
Click to expand...
Click to collapse
Mine is also the same when i have the original headset plugged in, i think the audio booster is set to very high or something, try changing the settings :]
Addictedd said:
Mine is also the same when i have the original headset plugged in, i think the audio booster is set to very high or something, try changing the settings :]
Click to expand...
Click to collapse
its not even activated :/
other solutions?
Use mp3gain to adjust the volume of your tracks. This is done (losslessly and reversibly) by adjusting the gain settings encoded into the mp3.
I have all the tracks on my PC set to 92dB but I have increased that volume up to 95dB for the tracks on my Diamond
to make sure:
when you use the up and down volume keys, volume is changed 3 bars at a time (3 out of 15 bars). Have you noticed u can change the volume a bar at a time bij using the touch screen?
pwhooftman said:
to make sure:
when you use the up and down volume keys, volume is changed 3 bars at a time (3 out of 15 bars). Have you noticed u can change the volume a bar at a time bij using the touch screen?
Click to expand...
Click to collapse
yeah, but on the first bar with some songs its still too loud.
Kashik said:
yeah, but on the first bar with some songs its still too loud.
Click to expand...
Click to collapse
I´d like to have this problem I permanently looking for some tweak to make mp3s playback louder...n I think I´m not stone-deaf
NOT JUST YOU
the speakerphone on my diamand is poo!
liamhere said:
NOT JUST YOU
the speakerphone on my diamand is poo!
Click to expand...
Click to collapse
Speakerphone volume seems like to be a joke or what
tommm said:
I´d like to have this problem I permanently looking for some tweak to make mp3s playback louder...n I think I´m not stone-deaf
Click to expand...
Click to collapse
maybe its a specific problem with my diamond... anyways, maybe its because of the player - can you recommend me other players?
You haven't been very clear about which player you're actually using!
I assume it's the HTC audio manager in TF3D? You've adjusted the volume of the player (in Schaps Advanced Config or something) down to 2-3% and it's still too loud? Something wrong there.
Try the Windows Media player that should already be installed.
Have you tried downloading and using mp3gain as I suggested above? It sounds like part of your problem is mp3 tracks with wildly different levels.
Hi I don't know if you have tried this obvious sollution yet or not; however, I thought I should mention it anyway, just because I know that when people tend to get frustrated, sometimes the obvious just slips by us.
Remember you have two volume controls on your device when playing MP3's. Your Audio player volume and your main phone volume. Try reducing both until you reach the optimim output level. I know that this really does not solve the problem because really you should not have to do this, but it might work for now.
Kashik said:
maybe its a specific problem with my diamond... anyways, maybe its because of the player - can you recommend me other players?
Click to expand...
Click to collapse
Like said above - wm player has its own volume control so try to reduce both
I just bought the bluetooth headset Jabra-3030, and the volume control on that headset acts as a audioplayer control, and not as general volume control (like HTC RC E100). So I can reduce the volume more and it's far better (because when I work I like a low low volume )
Davey101 said:
You haven't been very clear about which player you're actually using!
I assume it's the HTC audio manager in TF3D? You've adjusted the volume of the player (in Schaps Advanced Config or something) down to 2-3% and it's still too loud? Something wrong there.
Try the Windows Media player that should already be installed.
Have you tried downloading and using mp3gain as I suggested above? It sounds like part of your problem is mp3 tracks with wildly different levels.
Click to expand...
Click to collapse
i'm using the TF3D integrated player. no i didnt try mp3gain yet. no at 2-3% it is perfectly fine - but sometimes the volume seems to explode, especially with some songs - i see the point there. where can i find the standard WM mp3player btw?
Start digging in Programs
I have the same problem - if I use TFL3D and the standart headset that comes with the device, music is WAY TOO LOUD, even when I bring the volume control to just one bar. Using another music player (even MP) works, but hey, there should be a solution to fix that in TFL3D as well!
s_life said:
I have the same problem - if I use TFL3D and the standart headset that comes with the device, music is WAY TOO LOUD, even when I bring the volume control to just one bar. Using another music player (even MP) works, but hey, there should be a solution to fix that in TFL3D as well!
Click to expand...
Click to collapse
Hmm. I use the music player in TFL3d too. And yup, the volume was a little too loud at first..
Here's a fix :
Using a registry editor, I've changed the following key values:
HKLM\Software\HTC\AudioManager_Eng\Config\music_player_volumn --> 20 (default: 100)
HKLM\Software\HTC\AudioManager_Eng\Information\volumn --> 20 (default: 100)
Music volume is now comfy, even at 3 to 4 bars
kcinc said:
Hmm. I use the music player in TFL3d too. And yup, the volume was a little too loud at first..
Here's a fix :
Using a registry editor, I've changed the following key values:
HKLM\Software\HTC\AudioManager_Eng\Config\music_player_volumn --> 20 (default: 100)
HKLM\Software\HTC\AudioManager_Eng\Information\volumn --> 20 (default: 100)
Music volume is now comfy, even at 3 to 4 bars
Click to expand...
Click to collapse
It works like a charm, thanx
This fix works brilliantly! Thanks!!!
Now I don't have to carry another mp3 player to the library

X1 + 826X ROM + Radio = low volume

I recently upgraded to 826X ROM which basicly brought my old X1 back to life and I am very happy with it. Radio rom is 1.17.x I even tried with 1.14.x
But, for some reason, the volume in Radio is very low compare to volume I can get from, for example, CorePlayer. The signal level is OK, 4, 5 bars and there is no static heard, just clear reception. I can listen to it using headphones, but when turning it to phone's speaker I need to be in a very quite eviroment. But even on headphones, I can get much more out of CorePlayer...
Tried the audio booster that came with the ROM, no difference. Is there some setting in registry or anywhere, to change the volume of radio or what to do?
Oh and yea, I am one of those weirdos that listen to radio a lot, instead of my own playlists
i also would like to know...the speakersound with audio booster cab is good when i use windows media player,tcpmp or other programms but when i have a phone call,the speaker sound is not very loud or clear...any chance to change that?
well, here is something that is worth mentioning ... check on your screen. there is a button that looks like speakers with a "NO" sign on it ... like the don't cross sign. press that and see if it changes anything.

Can anyone exploit a bluetooth volume glitch on the xperia T stock firmware

I am wondering if anyone can exploit a glitch in the bluetooth audio volume on the xperia T
As most of you will no doubt be aware the bluetooth volume is rediculously low on the xperia T, i believe its low on most android phones?
However I have found that with all of volumes at max, If I go to setting, sound, volumes then set the ringer volume to max the volume to the bluetooth headphone literally doubles
Is this something that can be exploited by someone who is in the know?
I am desperate to get more volume from my phone via bluetooth as my headphones are very quiet in comparison to my old nokia n8, but more importantly music is rediculously low when connecting my phone to my car via bluetooth, its such a shame as both worked so well with my old nokia I would love to find a way around this problem.
Thank You
dougie175 said:
I am wondering if anyone can exploit a glitch in the bluetooth audio volume on the xperia T
As most of you will no doubt be aware the bluetooth volume is rediculously low on the xperia T, i believe its low on most android phones?
However I have found that with all of volumes at max, If I go to setting, sound, volumes then set the ringer volume to max the volume to the bluetooth headphone literally doubles
Is this something that can be exploited by someone who is in the know?
I am desperate to get more volume from my phone via bluetooth as my headphones are very quiet in comparison to my old nokia n8, but more importantly music is rediculously low when connecting my phone to my car via bluetooth, its such a shame as both worked so well with my old nokia I would love to find a way around this problem.
Thank You
Click to expand...
Click to collapse
Try installing xposed framework and finding the mod that allows the advanced volume control. It seperates all the volume streams so blutooth volume is not linked to other volumes.
Search for it in google or the themes and app section
gregbradley said:
Try installing xposed framework and finding the mod that allows the advanced volume control. It seperates all the volume streams so blutooth volume is not linked to other volumes.
Search for it in google or the themes and app section
Click to expand...
Click to collapse
When connected via bluetooth I get the bluetooth volume adjuster on my phone when I use the buttons, however this is already at max, with all volumes at max it is still very low, however just pressing the ringtone volume, even without adjusting it as it is already at max, it plays my ringtone for a second thn suddenly I have twice the volume, despite all volumes including bluetoth were already at max, suddenly I have plenty of volume?
dougie175 said:
When connected via bluetooth I get the bluetooth volume adjuster on my phone when I use the buttons, however this is already at max, with all volumes at max it is still very low, however just pressing the ringtone volume, even without adjusting it as it is already at max, it plays my ringtone for a second thn suddenly I have twice the volume, despite all volumes including bluetoth were already at max, suddenly I have plenty of volume?
Click to expand...
Click to collapse
ok,
which ROM?
which firmware?
which kernel?
I don't know much about this, but if anyone is going to help you they will need this
gregbradley said:
ok,
which ROM?
which firmware?
which kernel?
I don't know much about this, but if anyone is going to help you they will need this
Click to expand...
Click to collapse
Stock Sony was able to do it since I got the phone with .140 on and its the same now I use the latest .141 UK firmware
dougie175 said:
Stock Sony was able to do it since I got the phone with .140 on and its the same now I use the latest .141 UK firmware
Click to expand...
Click to collapse
Try this app : A2DP Volume, and set volume at max, it works for me.
nreuge said:
Try this app : A2DP Volume, and set volume at max, it works for me.
Click to expand...
Click to collapse
Brilliant Thank You, really hope this works
nreuge said:
Try this app : A2DP Volume, and set volume at max, it works for me.
Click to expand...
Click to collapse
This app does a nice job of setting media volume to max and works superb, however it hasn't solved the issue, even with all volumes set to max the Bluetooth volume is still very low, however just touching the notification or alarm volume slider and letting it beep, then doubles the output.
I have just flashed .145 Rom and kernel hoping it would fix the issue, but it still persists. Does it not do the same for everyone else?
I.e start walkman with Bluetooth headphones or car connected, start playing music, then go to settings, sounds, volumes and adjust the alarm volume, then the volume has Bluetooth output volume has suddenly doubled?
It didn't do it on custom Roms for me just sock ones, custom ones stayed quiet no matter what
"just touching the notification or alarm volume slider and letting it beep, then doubles the output."
THANK YOU! Fast little work around to get true max volume on my Xperia T. Can't believe Sony hasn't gotten this sorted after many updates. I can finally use my Jambox again haha!
The low bluetooth volume is a known issue on JB FW's for Xperia T. (read somewhere its related to actual JB rather than Sony only).
My fix for it is..connect BT headphone.. take a quick call.. just dial something for even a second n end...n volume increases on BT..

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