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Hey, when I search the forums for bluetooth a2dp I get overloaded with ROM posts.
I really wanted to ask someone here if they use any kind of bluetooth thing to connect to their car and play music.
I've found a couple things thru google, but none got good reviews.
here is 1
http://www.amazon.com/Scosche-motorMOUTH-Bluetooth®-Bluetooth-reception/dp/B001AVSWEE
I don't want voice dialing or anything like that, just something to play music in my car wirelessly.
Help!!
Unless you're willing to pay out the nose for some decent speakers, you're probably better off buying an fm transmitter and using your car speakers.
The problem is there isn't much of a market for what you're wanting, and sometimes its difficult for battery powered speakers to overcome road noise while not destroying sound quality. If you're bent on this notion though, take a look in outdoor wireless speakers. They will most likely not only be cheaper but have more oomph in them than a "car" bluetooth speaker.
generic.imitation said:
Hey, when I search the forums for bluetooth a2dp I get overloaded with ROM posts.
I really wanted to ask someone here if they use any kind of bluetooth thing to connect to their car and play music.
I've found a couple things thru google, but none got good reviews.
here is 1
http://www.amazon.com/Scosche-motorMOUTH-Bluetooth®-Bluetooth-reception/dp/B001AVSWEE
I don't want voice dialing or anything like that, just something to play music in my car wirelessly.
Help!!
Click to expand...
Click to collapse
Why don't you post what type of car and what type of car radio you have to begin with? Best route to go is to get an addon that is specific to your radio, or buy a new head unit all together that includes BT built in.
This is what I've been looking at: http://www.amazon.com/Kensington-LiquidAUX-Bluetooth-Remote-Phones/dp/B0011UIX2K/ref=sr_1_12?ie=UTF8&s=wireless&qid=1278794237&sr=8-12
Can anyone say how the sound quality of A2DP really is? Is it equal to the line out?
I did a search, because I was curious myself on what you could use and I found something on ebay that may be worth looking into.
For the price, you can answer calls and you can stream your music as well from what it says.
http://cgi.ebay.com/Car-MP3-Bluetooth-Phone-FM-Transmitter-SD-MMC-USB-/270598232508?cmd=ViewItem&pt=Other_MP3_Player_Accessories&hash=item3f00e959bc
seanmcd72 said:
Why don't you post what type of car and what type of car radio you have to begin with? Best route to go is to get an addon that is specific to your radio, or buy a new head unit all together that includes BT built in.
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Click to collapse
I have a 2007 scion tc with the stock radio. The car has a power port, ipod dock and a line in aux port inside the center console. I usually run the line from my phone in the dock to the line in port. I can power a bluetooth receiver from inside my console, so I would really just want a receiver if it sounds good. Fm receivers sound horrible, hoping that a2dp sounds better.
pardonmyfreedom said:
This is what I've been looking at: http://www.amazon.com/Kensington-LiquidAUX-Bluetooth-Remote-Phones/dp/B0011UIX2K/ref=sr_1_12?ie=UTF8&s=wireless&qid=1278794237&sr=8-12
Can anyone say how the sound quality of A2DP really is? Is it equal to the line out?
Click to expand...
Click to collapse
I was looking at that as well, I might get it. I also would like to know the sound quality of a2dp.
Thanks everyone for the help and replies!
Man I miss my TC, I loved that car..... Anyway, I find the quality is good for being wireless. I guess it could always be better I would rather use a cable, but you cant beat wireless streaming. I like that device pardonmyfreedom posted about, think I will def get one of those.
ckirkp79 said:
I did a search, because I was curious myself on what you could use and I found something on ebay that may be worth looking into.
For the price, you can answer calls and you can stream your music as well from what it says.
http://cgi.ebay.com/Car-MP3-Bluetooth-Phone-FM-Transmitter-SD-MMC-USB-/270598232508?cmd=ViewItem&pt=Other_MP3_Player_Accessories&hash=item3f00e959bc
Click to expand...
Click to collapse
I would stay away from FM transmitters for streaming music...****ty quality. Often sounds muffled and distorted not to mention inconsistent. Often switching between channels to find the best quality and then five mins it sounds like hell again...
My 2007 Prius has a line-in jack right next to a 12V DC input in the center console. I've tried numerous solutions, figuring that anything I use will be nicely hidden away in the center console. Unfortunately it seems that anything you plug into 12V DC will give you horrendous sound.
I have not gone so far as to find and try out something that is powered off AA batteries, but it would be an interesting test to show whether or not the DC adapter is what's killing sound quality.
For reference, I tried the Nexus One multimedia desktop dock (when I had an N1) and a Belkin unit which I should have known better as anything with the Belkin name on it sucks.
The other issue for me is that even if the sound was crystal clear and perfect, Android 2.1 (and I'm willing to bet 2.2 as well) will not auto-connect to A2DP. Only headset or hands free profiles. So I'd end up spending a minute getting the thing setup before even going anywhere. Too much hassle for anything but a 30+ minute drive.
FWIW, I have the Kensington LiquidAUX Bluetooth Car Kit.
2007 Honda Element, Aux/12V plug on the passenger side dashboard (roughly 4 feet away).
See: Amazon.com: Kensington LiquidAUX Bluetooth Car Kit with Remote for Music Phones: Cell Phones & Service
MP3 and music audio sounds pretty clear, though audiophiles will be disappointed. I'm used to listening to internet radio and satellite radio, so audio quality only needs to not hiss and pop for me to be happy. Besides, my car has a boat load of road noise, so no biggie.
Call quality sounds crisp for the incoming portion, as in I can hear the other party loud and clear. Unfortunately, the other party has a hard time hearing me. If you know what the speaker phone gives the other party in terms of call quality, imagine it being SLIGHTLY softer sounding to them. So, I can hear them perfectly fine, but they have a slightly harder time hearing me (compared to me being on speakerphone, and they on regular headset). Being closer to the microphone doesn't improve anything, and I could be 1 foot from the microphone or 5 feet from the microphone. It sounds the same to them regardless. They describe me as sounding muffled. Speakerphone already sounds muffled, and bluetooth with the Kensington sounds softer and still muffled.
The remote is a nifty feature, too. It controls the native audio player for play/pause/fwd/rwd. It also controls Slacker for play/pause/skip. AWESOME! Voice dialing doesn't work (though I hope FroYo fixes this).
Overall, I'm happy with the product and will use it while driving and simply speak a bit louder and slower while on the phone. Maybe FroYo will improve call quality enough to make this a better headset, but at least it's great for bluetooth audio playback.
Sorry, no pictures as of yet, because it's dark. I'll try to remember to take some tomorrow.
motorokr t505
motorokr t505 FTW.
Looked around with no luck. Was wondering if there are any reports of the OTA leak solving some of the BT issues.
+1 for the Motorola T505. I've been using mine for well over a year, and I love it.
Here are some photos of the Kensington LiquidAUX
http://androidforums.com/accessorie...w-kensington-bluetooth-liquidaux-car-kit.html
I have a Arkon car dock. Could I plug in my Liquid AUX in my cig lighter under my arm rest, and just dock my car with my ARKON car dock?
I have the one just like the one from ebay. Very happy with it just a few limitations, the bt has to be connected manually reach time
Pause and play don't work on all apps. Volume had to be down a little on the phone to get it to stop over saturation. But then its clear, loud pauses when in a call (have a plantronics975 for the phone)
Sent from my ADR6300 using XDA App
pardonmyfreedom said:
This is what I've been looking at: http://www.amazon.com/Kensington-LiquidAUX-Bluetooth-Remote-Phones/dp/B0011UIX2K/ref=sr_1_12?ie=UTF8&s=wireless&qid=1278794237&sr=8-12
Can anyone say how the sound quality of A2DP really is? Is it equal to the line out?
Click to expand...
Click to collapse
It's very good. No difference between it and the line out directly.
I just removed the "calling" part of it so I could keep a bluetooth headset (for calling - plantronics pro) from the bluetooth profile - works perfectly.
-D
Yeah, I got the liquid aux one and disabled the phone part too. I use tasker with it to turn bluetooth on automatically when I pop it into the car mount. I am loving the bluetooth sound, same as line in.
Sent from my DROIDX using XDA App
Anyone know of a widget or some other way for my phone to connect to my bluetooth? It doesn't connect every time, I have to dig into the settings and connect manually 50% of the time.
pardonmyfreedom said:
This is what I've been looking at: http://www.amazon.com/Kensington-LiquidAUX-Bluetooth-Remote-Phones/dp/B0011UIX2K/ref=sr_1_12?ie=UTF8&s=wireless&qid=1278794237&sr=8-12
Can anyone say how the sound quality of A2DP really is? Is it equal to the line out?
Click to expand...
Click to collapse
I have the LiquidAUX installed in my Z. For some extra punch, I also installed a Boostaroo between the LiquidAUX and my Sat Input. I think the audio quality is quite good. However, My ears aint what they used to be, and I do have a really nice BOSE system in the Z, so those two factors have to be considered.
The LiquidAUX connects to my DInc as soon as I start the car, so it seems well integrated. The only manual step I have is to launch Slacker, which I listen to exclusively.
One thing that needs to be fixed is, when I initiate a call via bluetooth, Slacker is not automatically muted, so the music really screws up the voice recognition. I have to pause Slacker before I initiate the call. I'm sure this will be fixed at some point, seeing how voice dialing just started working with 2.2.
All in all, I'm pretty please with how this setup works, and I have no issues with audio quality.
Hi Folks!
Recently got a bluetooth FM transmitter so i can go hands free in the car and use phones music player too
However the audio is very heavily compressed when using A2DP - no bass and the top end frequencies turn to mush - ie not good enough to use
Checked all eq settings and different FM frequencies, no difference
plugged the analogue audio cable direct from the phone to the bluetooth FM transmitter and immediately got perfect sound again
I dont see many poeple talking about this on this forum or many answers but the closest seems to be windows phones can access and modify registry settings to check and increase the bitrate
My current thinking is the bitrate (or bitpool) over bluetooth A2DP is set too low, or when the phone and FM transmitter pair the phone selects a bitrate that's too low for quality audio (but ok for calls)
My question is does anyone know how modify the bitpool settings on the Galaxy S please?
I am going to get a custom ROM and will very happy when the phone is really mine so if that's what it takes I'm up for it
Many many thanks!
DJ LIBRE
Samsung Galaxy S
2.1.1 Eclair on 3 mobile network in the UK
Nexus Drive Transmit Pro (Bluetooth FM transmitter music and hands free car kit)
I have the Galaxy S on 3 UK since August. I use the bluetooth to transmit sound to my Samsung surround sound system (as I don't own a stereo). I don't notice significant quality issues doing this. Are you sure both your devices are supporting A2DP. Not all A2DP devices talking nicely with each other, so you may be failing back to the normal Bluetooth frequencies which are more focus of the vocal range. I'm looking a car stereo's right now that support A2DP so I can stream my audio from my phone straight to my stereo, my phone is becoming the centre of my entertainment!!
I'm running Doc's ROM on my phone, can't recommend moving to his Froyo ROM's and an enhanced kernel enough, my phone is working so much better with his ROM, but there are lots out there to choose from.
I am using A2DP in my car too and I find the sound quality being very good.
The thing is, the default Android audio player (Music Player) is pretty poor and often it lags for me.
Since I moved to MiuiMusic (Search here) all those lags are gone and it works perfectly and smoothly in my car.
Now, as pointed already to you, all BT devices do not communicate flawlessly between each other sometimes...
works great for me, streaming from the SGS to the car CZ 509 deck
i don't even carry CDs in my car anymore
even the lovely sub base sound comes through clearly.
nothing better like a Sonic Massage meanwhile you are driving
I wanted to create a new thread on this, but then I've seen this one. Is there no one with a solution except flashing cyanogen?
It could be a setting on your bluetooth receiver.
For example, I've got a pair of Sony DR-BT21G bt stereo headphones. When you hold a special button combination, it switches it from "high quality" to "any quality", and will just select whatever bitrate it thinks is best, usually, something that sounds about half as good.
Try looking in your manual for troubleshooting and see if there are any settings that you can change on the receiver itself?
awojtas said:
It could be a setting on your bluetooth receiver.
For example, I've got a pair of Sony DR-BT21G bt stereo headphones. When you hold a special button combination, it switches it from "high quality" to "any quality", and will just select whatever bitrate it thinks is best, usually, something that sounds about half as good.
Try looking in your manual for troubleshooting and see if there are any settings that you can change on the receiver itself?
Click to expand...
Click to collapse
Hmm, i using Sony MW600 BT headphones. I've checked the manual, but there's nothing about quality :/
But i dont think that's the problem anyway, as i tried Cyanogenmod and it got perfect quality then. But otherwise cyanogen is quite useless for me on my Galaxy S, its just too buggy. There must be someone who can change the bitpool quality on the stock gingerbread to the highest possible...
Exact same issue for me (as described by DJ LIBRE), I have a Belkin Wireless Bluetooth Music Receiver and the sound quality is horid... it's got nothing on AirPlay which I think is still kind of average quality!
I also wonder if there is a highbitrate setting that can be adjusted?
Running CyanogenMod Nightly #130 on SGS.
After getting used to listening to 24/96 FLAC's with the Voodoo Sound mod enabled with a custom built headphone amp and semi decent can's all I can say is BT Audio is a waste of time!
Has anyone noticed whether the music player was set to 5.1 surround mode? Had a similar issue where turning off the 5.1 fixed the sound streaming...
Hello all.
I'm having problems with Bluetooth on my One. The device that I'm trying to use with it is called a Siemens MiniTek. (It's actually a hearing-aid accessory. You clip to the front of your shirt - it looks a bit like an MP3 player - and it plus my hearing aids together then function like a Bluetooth headset. So, when making a call, the sound is sent wirelessly to the hearing aids, and the device itself has a microphone on it.)
Making a call with it works okay; but if I try to use it to get audio out of my One in other conditions (playing a game, say, or watching downloaded video) then the video and audio are always badly out of synch - the sound lags at least one second behind the picture.
I'm using the stock HTC ROM, the latest one available in the UK (2.24.401.8).
Anyone have any thoughts as to why this might be happening and what I can do about it?
Mby there is too much data to deliver via bluetooth (high quality audi/video sound) and the hearing aid device is not meant to recive such a load.
When calling to some1, the sound quality is only like 24kbps or something.
Just a thought
Rendoqoz said:
Mby there is too much data to deliver via bluetooth (high quality audi/video sound) and the hearing aid device is not meant to recive such a load.
When calling to some1, the sound quality is only like 24kbps or something.
Just a thought
Click to expand...
Click to collapse
That might result in there either being no sound at all or in the sound quality being very poor, but I don't see that it would result in reasonable-quality sound running 1 second behind the picture...?
The device itself is designed to handle fairly high quality sound: as well as receiving Bluetooth signals it can take analogue audio input via a 2.5mm stereo jack socket, and it also has a separate "base station" transmitter which you can plug into (say) the headphone socket of your TV: the transmitter then sends a signal wirelessly to the MiniTek (using a proprietary version of Bluetooth) and the MiniTek relays it to the hearing aids. Using either the direct-line input or the wireless transmitter works quite nicely, and there's no perceptible lag problem there.
I should have said, I've been onto Siemens tech support about it, and they're adamant that it shouldn't be doing this, and they don't know why it is. So I'm looking for a problem at the phone end.
Shasarak said:
I should have said, I've been onto Siemens tech support about it, and they're adamant that it shouldn't be doing this, and they don't know why it is. So I'm looking for a problem at the phone end.
Click to expand...
Click to collapse
i've experienced the same issues on various BT-Receivers and Smartphones. Seems to be a general issue. So far, this 1 second lag was present on all combinations of:
Phones: Samsung Galaxy S2 / iPhone 4 / HTC One
Receivers: Creative D100 / Creative D200 / Belkin BT Adapter
As i found out so far, this problem occours when the receiver can't handle the apt-x codec and audio has to be resampled to the older SBC codec. Found one thread kinda dealing with this topic, but haven't tried it out for myself at the moment. I'll do some testing later when i'm at home.
http://forum.xda-developers.com/showthread.php?t=1256407
I am able to connect to my car and use it to make and receive calls with no issues. When I attempt to stream music to the car it connects but the car will not let me switch to the phone audio to play the stream. I think it could be a bug with the ROM.
Anyone else able to use Bluetooth for music streaming in their car?
getting my One wednesday if my Best Buy rep was accurate, and BlueTooth music better work, that's what I always use for playback!
Using it with an HS3000 hard wired into my headunit for the audio profile while simultaneously connected to the headunit itself for the phone profile and its working fine. Perhaps theres a firmware update for the headunit in your car?
I'm not able to get it to see my Sony Automotive Bluetooth player but I haven't messed with it while not driving to really go in to it.
lacrossev said:
Using it with an HS3000 hard wired into my headunit for the audio profile while simultaneously connected to the headunit itself for the phone profile and its working fine. Perhaps theres a firmware update for the headunit in your car?
Click to expand...
Click to collapse
You are receiving the audio through the 3.5mm jack. My phone connects to the car and audio calls work great. I'm also having an issue with my TV. It shows connected but no audio plays, however when I press the volume on the phone it changes on the TV. I'm thinking something is missing or messed up in the ROM. I'm not sure if this is happening with other versions. It would be good to know.
Bachatu said:
You are receiving the audio through the 3.5mm jack. My phone connects to the car and audio calls work great. I'm also having an issue with my TV. It shows connected but no audio plays, however when I press the volume on the phone it changes on the TV. I'm thinking something is missing or messed up in the ROM. I'm not sure if this is happening with other versions. It would be good to know.
Click to expand...
Click to collapse
Well your question seemed to be a question of bluetooth connectivity using the audio profile, so i gave you one example of when it does work for me. It doesn't matter that its outputting from the HS3000's 3.5mm in to a line in in my car, the audio gets to the dongle is the point i was getting at. Here are a few other things i have tested with it since i was curious as to whether this is a bug:
Moto S305, LG Tone, LG Tone+, Francois et Mimi Trois speaker, generic bt speaker i got as a door prize, and a samsung soundbar. Nobody can help you test whether there is a bug if there no information as to what you're trying to connect to other than "your car". As far as i know your car's bt protocols might be outdated and HTC left out some code for their BT drivers to work with older systems or if it is a genuine bug.
I appreciate your input, I thought you meant the cable was connected to your phone. It's wierd that I have a 2013 car and my EVO 4G LTE and an S4 both work but the new M8 doesn't.
I have no problem with streaming over BT to my car stereo or routing phone calls through it. I do have stuttering audio while streaming, however, which upsets me greatly.
I went back to the car and started messing around with settings and it now works. I had to disable and enable audio streaming. Audio is clean and crisp. Thanks for the feedback!
Captain_Throwback said:
I have no problem with streaming over BT to my car stereo or routing phone calls through it. I do have stuttering audio while streaming, however, which upsets me greatly.
Click to expand...
Click to collapse
At times my audio will not come through. turning off BT in the car and turning it back on seems to allow the audio to work.....
I do however get the audio stuttering from time to time. Sounds like a CD skip almost. Yea I have been trying to figure out if there is a setting missing or something....most likely a bug though.....
Is the stuttering with all apps? I havent had much issue now but on my evolte i used ti get stutters whenever i transitioned towers or went screen off using gonemad and some flacs, poweramp seemed to be a bit better at it though.
Sent from my 831C using Tapatalk
Captain_Throwback said:
I have no problem with streaming over BT to my car stereo or routing phone calls through it. I do have stuttering audio while streaming, however, which upsets me greatly.
Click to expand...
Click to collapse
Wow, not good. It's posts like these that help me to be more patient as I wait for my upgrade in July. Hopefully the little one like these are ironed out by that time.
I'm also getting random Bluetooth skips. Probably kernel related.
Sent From My HTC One (M8)
phone is not the issue here. Most smartphones have the capability to stream music over BT. The problem is usually when your car is setup to only handle calls over BT, nothing more. there's a workaround for this: You use Mono Bluetooth app in combination with your favorite music player app. It's not HD, but it works.
Code:
https://play.google.com/store/apps/details?id=com.maxistar.monobluetoothfree
Rydah805 said:
I'm also getting random Bluetooth skips. Probably kernel related.
Sent From My HTC One (M8)
Click to expand...
Click to collapse
It seems my factory car stereo (which is only a year old) doesn't like the M8. I tried my 7 year old BT headphones and they streamed like champs. Stupid factory head units . I'm trying a couple of changes in audio_policy.conf to see if they make a difference. I don't think kernel is the issue here.
Captain_Throwback said:
It seems my factory car stereo (which is only a year old) doesn't like the M8. I tried my 7 year old BT headphones and they streamed like champs. Stupid factory head units . I'm trying a couple of changes in audio_policy.conf to see if they make a difference. I don't think kernel is the issue here.
Click to expand...
Click to collapse
Does your radio have the ability to turn Bluetooth audio streaming on/off? That's what worked for me with my factory unit.
Bachatu said:
Does your radio have the ability to turn Bluetooth audio streaming on/off? That's what worked for me with my factory unit.
Click to expand...
Click to collapse
No.
Alright, fixed up my streaming issue. I'll explain later and post a fix. Busy right now.
So what I ended up doing was updating audio_policy.conf in /system/etc to allow lower bit rate audio over BT/A2DP. Currently the file only allows streaming at 48000, while some devices can only handle good ol' 44100. Adding in the additional value seems to have smoothed out my streaming for the most part.
I did notice some intermittent skipping when my device was in car mode and/or charging at first, but those issues seem to have sorted themselves out now. I would recommend deleting your device and re-pairing after making the change to ensure the connection is set properly.
I'll post up a flashable zip shortly to allow others to see if it helps/works for them.
EDIT: Zip attached. Sorry it took so long, Firefox was giving me problems.
@Captain_Throwback thanks bro, will give it a try. I've noticed it only to skip when using stock HTC media apps. Using Google Play music doesn't skip for me. May be a coincidence? Anyways, flashing your fix.
Sent From My HTC One (M8)
Hello everyone!
So last weekend I finally received this: LINK (EBAY)
I am totally new at Android Auto, though I have had several Andrioid Phones, as well as an Android tablet. Now I have an iPhone SE - so yes, I turned to the dark side. Not important here and now.
My question is - When I had both phone and tablet with android, I remember the many many possibilities I had with rooting etc. What do I have with my Radio? Can I root it? Can it be even better?
The only negative thing I have to say, is that the sound quality via bluetooth is quite poor - especially in the higher notes. The bass however, is still awesome on bluetooth. The sound quality is only bad on bluetooth - which tells me there is something wrong with the bluetooth hardware og the bluetooth software. Very sad to find out - I listen to bluetooth music 90% of the time. That issue let me to thinking: Is there a way to fix it? Maybe a root or something?
Also - are there some must-have-apps I should know about?
Looking forward to hear from you.
Thanks.
I have noticed the same, however it is not related to Bluetooth, the BT quality is fine, the sound quality problem begins when Android Auto is activated. Try using Spotify with the standard BT connectivity. Then test the same song with the USB cable connected and using AA. The sound quality is fully degraded when using AA compared to the BT quality. I Use Viper4Android and the drop in quality is even bigger since Viper4Android doesn't catch the sound stream.
Any idea out there?
By the way, I'd rename the subject of this thread since the sound quality problem is not related to Bluetooth but with Android Auto.
Same, don't think there's a way around it.
https://productforums.google.com/forum/m/#!topic/android-auto/1OVZA4SUG-g
Second comment on that article, has to do with digital vs analog and our built in equalizer. You'd think digital would sound better
sushi143 said:
Same, don't think there's a way around it.
https://productforums.google.com/forum/m/#!topic/android-auto/1OVZA4SUG-g
Second comment on that article, has to do with digital vs analog and our built in equalizer. You'd think digital would sound better
Click to expand...
Click to collapse
BT is also a digital stream and sound is excellent, even more when paired with Viper4Android. Nonetheless V4A doesn't seem to catch the digital output stream used by AA.
Maybe it's just usb? My thumb drive doesn't sound as good as my Bluetooth with the same song either.
Yea, audio is transmitted via USB, so in theory the quality should be even better since it is transmitted without the SBC compression like with BT (unless you have aptx). If your in-car has a built in equalizer i would advice to use that one
ktwo said:
Yea, audio is transmitted via USB, so in theory the quality should be even better since it is transmitted without the SBC compression like with BT (unless you have aptx). If your in-car has a built in equalizer i would advice to use that one
Click to expand...
Click to collapse
The theory is not working in this case, most probably because we don't know the root cause of this weird and annoying issue.
Car equalizer is not working when there are missing frequencies. BT works perfectly, but when playing the same song, with the same device and app (Spotify, music player, TuneIn) the quality is severely degraded when using AA. No deep bass and no treble. Total loss of both ends of the audible spectrum while BT quality is superb (compared to the crappy AA quality)
I have tested this issue with a Chevy Malibu 2017, Chevy Impala 2017, Ford Fusion 2018, Buick regal 2017 and Hyundai Sonata 2018. Same degradation when using AA with different head units, different apps, Axon 7. I hardly believe it is a device issue, I believe it is a problem with the protocol. Are you experiencing this issue? I am using RR ROM.