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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > AUDIO/VIDEO + BLUETOOTH + Electronics/Alarm/Software > eBay Bluetooth Streaming Box DIY and Reveiw



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      01-20-2021, 10:10 PM   #221
Emilime75
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Quote:
Originally Posted by ctuna View Post
If somebody would make one of those android head unit's that would attach
to the Most Bus the way the this box does it would be a pretty good thing.
Totally agreed. This is what's kept me from getting one for ages. I did, however, order the Andream MMI today, even though it does use the AUX port.

FYI, there are universal Android head units available now that have digital audio outputs. Doesn't quite help us with integrating them into our cars, but it's a step in the right direction, especially if you're running an external DSP with digital inputs.
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      01-20-2021, 10:17 PM   #222
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https://xtrons.com/bmw-various-andro...b-rom-qb8060ci
https://xtrons.com/bmw-various-andro...b-rom-qb8060cc

Also Joy apprently.
See this thread.
https://www.diymobileaudio.com/threa...uality.432591/


Site Claims :"Amplifier System - Retains original fiber optic sound system, e.g., your Harman Kardon."
Not sure if that means it bypasses it or if the head unit output is optical. I have attempted to contact them without any luck.

Last edited by Aussieatlarge; 01-20-2021 at 10:43 PM..
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      01-20-2021, 10:41 PM   #223
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Does not make it clear how it connects to the orignal system most of
these use the aux for audio which is the problem.
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      01-20-2021, 10:57 PM   #224
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FYI, there are universal Android head units available now that have digital audio outputs. Doesn't quite help us with integrating them into our cars, but it's a step in the right direction, especially if you're running an external DSP with digital inputs.[/QUOTE]

The digital audio outs are optical? If so, is the issue that we use MOST protocol?
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      01-21-2021, 08:19 AM   #225
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They're coaxial, and you'll find them on the Intel based units. That, in itself, isn't an issue as there are cheap coaxial to optical converters. Yes, the issue is MOST.
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      01-21-2021, 11:28 AM   #226
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my guess is they use toslink which is the biggest optical standard .
Yes most is a different protocol developed for cars in Europe.
The first translators where Mobridges Most to toslink.
They are pretty expensive for what they do though.
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      01-21-2021, 11:39 AM   #227
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All of the ones I've seen are coaxial and are only available on the recent Intel based units. Have not seen any of these trickle into the OEM replacement form factors, just universals at this time.

If they ever came out with an OEM replacement that integrated into the MOST bus and had digital output, I'd buy it. I'd run it to a DSP with digital inputs and build a system from there.
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      01-21-2021, 12:33 PM   #228
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If you happen to have Logic 7 Mobridge now makes a amp/dsp that has direct
Most Input. That's new. Also the newer EVO BMW head units have a lot more
of the functions that used to be in a seperate module integrated into the Head
Unit and much better software like android auto and other internet apps.
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      01-21-2021, 09:56 PM   #229
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Avin sent me an email with these links:

https://avinusa.com/8-8-multimedia-n...1-e92-e93.html


https://avinusa.com/most-fiber-optic...7-e88-e89.html

I asked them whether the 8.8" radio incorporated the most-fibre-optic-amp-interface and am waiting for a response.

Can you gents clear something up for me please
1. With my old Dension500 gateway, the ipod is presented as though it were 5 CDS which allows for browsing.
2. The android head unit is selected via Aux.

With the BT units (either via the newer Dension gateways or the Grom or the unit that is the subject of this post, does it show up in Aux or as a CD?
Am I right in assuming the the most-fibre-optic-amp-interface would behave the same way and that anything requiring the Aux selection will sound bad?
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      01-21-2021, 10:28 PM   #230
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From the first link you posted,

Audio
Android Audio Output
All audio from the Android monitor is outputted to the BMW factory AUX input.
You MUST have a working AUX input for sound to work.

The 2nd link looks like it would work for any analog audio source straight into the factory amp, including the Android head units that use the AUX. The down side is that you have another format conversion happening, meaning the the head unit converts the signal from digital to analog, and then this device converts it back into digital. I'd also question the quality of both the DAC and ADC on both devices. Not ideal, by any means, but it would work
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      01-21-2021, 10:52 PM   #231
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There really is no solution to integrating these head units. Like I said, I am happy to forego my 8.8 headunit and install a good 2DIN from the likes of Kenwood,.....
If I could get carplay to work through my factory amp, I would be stoked.
You saw that I was getting desperate to where I was going to use the carplay UI on my android unit and stream the audio directly from my phone via BT to a Grom unit.

Come on. You have been at this for a lot longer than me. What is the best solution?
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      01-22-2021, 03:47 PM   #232
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If you value Music you want to bail on the factory Amp.
Be it Hi Fi or Top Hi Fi.
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      01-22-2021, 05:31 PM   #233
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Quote:
Originally Posted by Aussieatlarge View Post
There really is no solution to integrating these head units. Like I said, I am happy to forego my 8.8 headunit and install a good 2DIN from the likes of Kenwood,.....
If I could get carplay to work through my factory amp, I would be stoked.
You saw that I was getting desperate to where I was going to use the carplay UI on my android unit and stream the audio directly from my phone via BT to a Grom unit.

Come on. You have been at this for a lot longer than me. What is the best solution?
To be honest, I think the most cost effective and easiest way to get BT audio, CarPlay and/or AndroidAuto in our cars is with one of the MMI boxes. Look at Andream and Wakaa - there are others, as well, as well as the expensive options from companies like BimmerTech, but those are the exact same thing. The MMIs also include the option to add rear view cameras and a 2nd video input that can be used for any other composite video source, i.e. front camera, TV tuner...

From there, you can take the analog audio that MMI outputs and...
A) Run it into your AUX.
B) Run it through that MOST adapter you linked.
C) Run it to an aftermarket amp/dsp.

I just ordered the Andream MMI and backup camera. It's not ideal, but it'll have to do. I'll use the AUX until I'm ready to rip the car apart and go with option C, above.
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      01-22-2021, 11:11 PM   #234
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There might be a chance the AUX on the Bluetooth Box is better .
It would be interesting to find out.
People would talk about a component inserted in the cable of the
BMW Aux to prevent noise as a reason for the fidelity hit.
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      01-22-2021, 11:26 PM   #235
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I doubt it, I think it's the BMW input stage that's the problem. For what it's worth, my AUX input isn't noisy and doesn't sound any worse than CD on the base stereo. My only real gripe about it is that it can't take a high input voltage, so plugging my phone into it gets me decent sound quality, but not enough volume because when I start to turn up the volume on my phone, then the system starts distorting. Same thing goes when I use an external BT receiver that plugs into the AUX. At the same time, plugging my phone or using the same BT receiver on other(home) systems yields good results.
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      01-22-2021, 11:54 PM   #236
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I honestly just skipped all that: got a Hiby R3 and connected it directly to my aftermarket amp. Controlled via my iPhone app. So source doesn't go thru the potential mess abs outputs to speakers.
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      01-23-2021, 02:10 AM   #237
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This is a bit embarrassing but maybe now you will understand just how bad my Android unit's audio was and why I was so desperate. I found a lightening to USB and 2.5 audio adapter lying around. Plugged the USB into my CarPlay dongle and the 2.5 into the aux plug in the armrest. I muted the head unit and am using it only for the UI. The sound Quality is chalk and cheese compared to the head unit. One thing to note is that the aux plug in my armrest may be an add on with the Dension because it has no USB and includes a slider switch to select CD shuttle or iPod. I still select the aux option on the Bmw entertainment screen.
Honestly, I am satisfied.

Small issue is that i need to unplug the 2.5 from the adapter and plug it back in after each reboot or the volume is very low.

It just occurred to me that i might get the same end result by taking the rca from the head unit straight to the 2.5.
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      01-24-2021, 11:21 AM   #238
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So is the ebay box still the go-to? Something like this?

https://www.ebay.com/itm/123783948264

I have a 09' 335d with individual audio, non-idrive, bluetooth (for phone calls), and usb + aux in center console.

Looking for the best sound quality w/steering wheel controls.
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      01-24-2021, 12:17 PM   #239
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If you already have usb not much point in getting one of these .
Bluetooth streaming will always be of lesser fidelity .
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      01-26-2021, 06:41 PM   #240
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Last chapter.
See the image of my menu options.
My gateway has the following inputs
iPod
USB
RCA (aux)

Note that the aux on this menu is different from the aux on the regular menu.
Connecting my lightening connector to RCA allows me to stream Spotify. Good enough quality.
Bluetooth adapter on the iPod connector does not work
USB will work but needs to be a music library (like the iPod)
I tried connecting the rca to the rca on the head unit and it was exactly as bad as the current setup which is aux.
I will try a bt to rca which should be ok.
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