So, I am currently bypassing my car's infotainment and amp to run a high end audio system. Reason for this is the stock CMU and Factory Amp just don't cut it for power, bit-rate, and sampling compared to a quality aftermarket system. I'm currently running an OTG that goes to a Digital to digital converter converting to optical audio straight to my DSP.
I'd LOVE to have Android Auto working while being able to send audio directly to my own system rather than the car's. But Android Auto entirely overrides audio outputs from the phone and forces audio to be done through the connection even if wireless. (so that I'm not using the stock amp which is integrated into the car's MOSTbus and a royal pain to work with, and double amp set ups are horrible for quality and tuning audio)
Has anyone figured out how to change the audio output of the phone/android auto to be separate of the Android Auto service while retaining the Car's connected Android Auto features/controls but using the separated audio stream?
Hi. Same problem
Related
Recently i was searching for a possible way to use my hero as a usb mic or even a device to link my sharper image bt head set (with mic) to my pc. after reading a lot i realized neither have been aimed for or achieved that i could find.
after snooping i found this description of the protocol used to communicate with BT devices.
("The other main way to get audio out easily is via Bluetooth. The DROID does support the AD2P (Advanced Audio Distribution Protocol) profile, for talking to music quality headphones It is compressed, and by default uses an encoding called SCP, which is simpler than MP3 but kind of the same idea. The protocol handshakes with your headphones, and supports direct distribution of encoded audio without re-compressing if your headphones support it, in MPEG, AAC, and ATRAC formats.
Of course, like every Bluetooth phone, it also supports the HSP "headset" protocol, which is monophonic low-quality audio in one direction, voice in the other direction, each at 64kb/s using the very low complexity CVSD compression, or straight PCM audio (8-bit samples at 8kHz). ")
this made me think why not use AD2P or something simillar to comunicate via usb with a application on the pc end (receiver/sender) to handshake with the droid and transfer high quality audio data over usb.
basically using a form of ad2p to take direct audio from the internal sound driver or card and redirecting it to usb instead of blue-tooth. People said usb audio could not be done, seance this is a data transfer can this be done?
AFAIK, if you hook up your iDevice to a car-stereo via USB, the sound is transmitted digitally, and the stereo does the analog conversion (superior quality) (is that correct? or is there an analog signal on that wire?)
also AFAIK, there are 3 ways to play music from android to a car:
A2DP (****ty quality, see wikipedia entry)
AUX (****ty quality, no remote control via AVRCP (all steroes I tried only support that if you do A2DP as well)
USB (via mass-storage -> no turn-by-turn navigation, etc.)
so: sucks.
is it possible to emulate the iDevice dock-connection?
or is A2DP really that ****ty? and other choices for audiophiles?
thanks!
I use A2DP from my Tab to my Sony headunit and it sounds fine. There's obvious compression artifacts, but I think that's more a side-effect of using MP3 formatted files than loss from the BT streaming and/or SBC compression. BT 2.0+ offers up to 3Mb/s of throughput, with a dedicated 64Kb/s for voice layer, and the remaining for the data layer, which A2DP uses. Assuming you're using BT just to stream audio, the ~2.95Mb/s remaining should be able to easily handle even files encoded at 320Kb/s. The one other factor that would play into how "clean" it sounds is the bitpool setting that the Tab uses to stream the audio. If it's relatively low, it doesn't matter how much bandwidth you have available as it'll always sound tinny or out of tune. As far as my searching could tell me, bitpool settings aren't adjustable (by user) on the Android platform (unlike simple WinMo registry editing).
The default bitpool value (32) is the root cause of the A2DP BT suck. It's set in the Android kernel at compile time. Cyanogen's CM6 and CM7 ROMs ship with a bitpool rate of 53, and community consensus is that this is the definitive fix. (No disrespect meant to other custom ROM devs who may have fixed this as well.)
The headphone jack is "****ty quality"? Have you tried a Voodoo kernel?
The digital connection also relies on a stereo with a USB jack that supports the iPod interface. You'd have to put in a USB audio proxy that duplicates the iPod's command system to get it to work.
A2DP sounds pretty good to me anyway, when it works.
ok @voodoo kernel, haven't tried that.
but there's (to my knowledge) no car radio that forwards commands via connected a2dp while the audiosource is set to AUX
I'd have to do a lot of magic via some weird CAN-bus-bluetooth-dongle and a selfwritten program to get my steering wheel buttons to work. they do work if bluetooth is connected.
How can i force my car : Hyundai Sonata to use AUX audio output instead of USB that comes when using Android auto, because with using usb i get 1-2 seconds sound delay while on aux it works normally, is there anyway to disable the android auto from getting audio from usb and just get audio from aux?
when i play my media through AUX there is no delay or lag, but when i use Android auto it uses remote_submix to get audio from usb and therfore i cant use my aux audio, i tried to disable remove_submix but android auto wont start, any idea how to reroute audio from android auto usb to aux?
Hi
I'm using Android Auto with a Note 9 connected to a Kenwood DNX9190DABS head unit. Everything works well.
My understanding of the audio process involved is as follows: the USB-C output from the phone is digital and by-passes the phone's DAC. The crucial element in terms of audio quality is therefore the head unit's DAC..
I'm thinking of substituting another phone for the Note 9 so I can keep the Note 9 as a phone and therefore not need to connect it each time I use the car. My plan is to buy a cheaper / older phone to use as a dedicated music player in the car with the only criterion being that it works with Android Auto.
My question is this: is the audio quality of digital output from USB pretty much the same whatever the phone with the head unit DAC remaining the crucial element or does a higher end phone have better digital audio output?
Thanks.
Have you tried AAGateway from Emil?
I'm using Galaxy S3 as gateway and use my S10 over wifi hotspot, the audio is the same quality as USB directly
It doesn't matter what phone you use, as long as it's compatible with the USB DAC (not all are).
The phone won't be processing the music.
This is my setup:
Aftermarket head unit (IDCORE) connected through AUX to car stereo. AA is connected wireless (S10+, stock) with head unit; there is also car BT connected to mobile; when driving TWO active BT connections: 1, phone - car BT for audio and 2, IDCORE for AA).
And this is my problem:
AUX output (head unit -> car stereo) works, but has a quite annoying (static?) noise. Ground loop isolator is set, everything I can do hardware-wise is done -but the quality of AUX sound is MUCH LESS than it is when using BT phone-car connection (makes sense, Meridian built in system, with fiber optic).
Question:
considering above and that there IS an active phone-car BT audio connection during driving (beside the necessary AA-IDCORE connection) is there a way (software, app, switch?) to route AA sound through the phone-car BT audio connection, instead of the (noisy!) AUX wire?
Rooting of the phone is not an attractive option (due to my company account on the phone) - but I would be interested in any solution; as noise on the AUX output is quite disturbing. Thanks in advance
Have you checked the Bluetooth settings and checked music audio for the connection to the head unit?
Just did it. I CAN route music audio (in my case TuneIn) to BT in the settings of the phone (sounds, separate app sounds setting), but 1, this does not work (no sound over car BT from TuneIn, when using it on AA), 2, this setting can only be set for ONE application at the time (and I also use navigation, news service on AA), 3, the Android Auto app (the one I need?) does not show up in the application list of this setting. Still stuck.
My idea was (but I don't know if it is possible) a nifty app, that FORCES all sound (music, nav, news, etc) from the phone to BT (car), even when using AA.
I've got the same problem, using AA over USB and can't get Viper working because it doesn't stream over Bluetooth.
I have the same request. I have an AA unit attached to an original BMW X5 nav system. I can switch between them by long pressing the MENU button. The problem is that the AA unit can output sound only via audio jack and my car's system has fiber optics. The quality is very poor when compared. Is there anyway in which I can force my Android phone to output AA sound through car's BT? The AA unit has an option to do this for phone calls but unfortunatly not for regular sound (Spotify etc).
Anyone heard of anything related to this? I noticed that in the iPhones there is a setting in the accessibility options to route the audio through bluetooth. But there is nothing similar in AA. I can't believe this feature is not requested more.
Has anyone solved it? I'm struggling with the same thing.
I just ended up buying a BT transmitter which connects to my device's jack audio out and in turn it connects to the car's bt. It is stupid that there is no software solution to such a simple problem. Why can it do it for audio calls but not for music!? Why the iPhone can do it but the all configurable God of a mobile OSes simply can't?
Also, another idiotic thing of AA is that it doesn't allow you to switch the call to speaker or another bt device... in fact nothing happens when I get a call on the actual phone when connected to stupid AA. This is sooooo idiotic. Way to go android...
Aawireless also has a fewture that solves this also
Really? Where? What is it's name? Where do I access this?!
Aawireless: that is a piece of hardware again, isn't it (https://www.aawireless.io/)?
I look for an app/ software to solve this issue, if possible..
Aaahh I thought the reference was to Android Auto Wireless not a 3rd party hardware thing.