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Extracting usable signal from MOST150


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#1 MikeFish

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Posted 15 Apr 2016 - 23:32

I was hoping to buy an Audison Bit DMI or MoBridge DA1 to plug my MOST fibre cable into. The. MOST fibre feeds the Bose amp and I wanted to use one of the devices listed above to give me a digital signal (toslink) to feed into my processor / amps.

However, I have discovered that Audi changed the type of bus signal used in the facelift a6 / RS6 in 2015 to use the later / faster MOST150 format. This is not compatible with these devices. I emailed mobridge and they said they had no plans to modify the hardware and software that would be required to make it compatible.

So is there any other way I can get a digital signal that I can use to feed my processor?


Alpine INE-W928R, Alpine PXA-H800 / RUX-C800, DLS A4 (bridged), Focal Utopia 6W3 mids & Utopia Tweeters with 165KR2 Crossovers, JL Audio 6w3s in rear doors (currently redundant), DLS A6, JL 12W7 in crap box Focal 46KX4 (free air). Focal Utopia No.7 passive kit in garage awaiting installation with 2x DLS A3

Plans: a little more dynamatting for boot, then all installed properly. Somehow get Utopia No.7 into doors and wire up the crossover.


#2 greeef

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Posted 16 Apr 2016 - 11:18

had a google

http://vector.com/vi_vn2640_en.html

think that might do it. No personal experience, just guessin.


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#3 gibbano

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Posted 16 Apr 2016 - 11:33

Interesting, that. According to MoBridge technical their devices actually mimic the ID of the BOSE system, so cannot be used in conjunction with it. I cannot believe there's nothing on the market which'll do just that.

 

Reading the Vector manual: "Operating modes Master, Slave, Spy*, Bypass Spy for the control and asynchronous channel Can be activated in parallel to other modes or separately"

 

Spy I would guess allows it to intercept / pass through the audio signal so you can keep the BOSE amp in place, avoiding any possble warranty issues?



#4 MikeFish

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Posted 16 Apr 2016 - 12:58

Interesting. I'm reading through the manual but it implies you need to be connected to a PC. Need to read a bit more though.

Alpine INE-W928R, Alpine PXA-H800 / RUX-C800, DLS A4 (bridged), Focal Utopia 6W3 mids & Utopia Tweeters with 165KR2 Crossovers, JL Audio 6w3s in rear doors (currently redundant), DLS A6, JL 12W7 in crap box Focal 46KX4 (free air). Focal Utopia No.7 passive kit in garage awaiting installation with 2x DLS A3

Plans: a little more dynamatting for boot, then all installed properly. Somehow get Utopia No.7 into doors and wire up the crossover.


#5 Blinkybill

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Posted 18 Apr 2016 - 20:46

If you are prepared to pay, the guys at Nav-TV maybe able to do something for you. They push audio into the MOST system,



#6 MikeFish

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Posted 18 Apr 2016 - 21:18

I've emailed Vector to see if their product will do what I want (I suspect it will do a whole lot more than I need) and for a price as I can't find any online sellers for it.

 

I've also email NAV-TV to see if they have any plans for such a product.

 

I know MoBridge have alreayd stated they have no plans to support this. Maybe I'll see if Audison have plans? I suspect that MoBridge make the hardware and Audison rebox it though?


Alpine INE-W928R, Alpine PXA-H800 / RUX-C800, DLS A4 (bridged), Focal Utopia 6W3 mids & Utopia Tweeters with 165KR2 Crossovers, JL Audio 6w3s in rear doors (currently redundant), DLS A6, JL 12W7 in crap box Focal 46KX4 (free air). Focal Utopia No.7 passive kit in garage awaiting installation with 2x DLS A3

Plans: a little more dynamatting for boot, then all installed properly. Somehow get Utopia No.7 into doors and wire up the crossover.


#7 NichtFahrzeug

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Posted 18 Apr 2016 - 21:22

Might be worth speaking with mObridge again - my expectation is that they will bring out a 150-compatible hardware platform, GUI and adaptor settings for the new Audi range.  waiting for info on that.


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#8 MikeFish

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Posted 18 Apr 2016 - 21:26

This was Mobridge's response 2 and a half weeks ago:

The 2016 cars run MOST150.  This is new technology which requires new hardware and a lot of engineering.  We are not looking at developing anything at this stage for these cars.

 

I will wait a while before contacting again whilst I await responses from everyone else as I doubt much has changed in such little time. I don't want to annoy the guy too much yet. Butyes, I am surprised they are not planning on making a device as I imagine more and more cars will be using inlcuding other car manufacturers too.


Edited by MikeFish, 18 Apr 2016 - 21:27.

Alpine INE-W928R, Alpine PXA-H800 / RUX-C800, DLS A4 (bridged), Focal Utopia 6W3 mids & Utopia Tweeters with 165KR2 Crossovers, JL Audio 6w3s in rear doors (currently redundant), DLS A6, JL 12W7 in crap box Focal 46KX4 (free air). Focal Utopia No.7 passive kit in garage awaiting installation with 2x DLS A3

Plans: a little more dynamatting for boot, then all installed properly. Somehow get Utopia No.7 into doors and wire up the crossover.


#9 MikeFish

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Posted 19 Apr 2016 - 10:39

Vector have replied. They said there are 2 ways of achieving what I want using the VN2640 but both would require a PC connected and running.

He said they also do a data logger (that doesn't require a PC to be attached at the time) that works with MOST150 but I can't see any digital outputs that I can use.


Alpine INE-W928R, Alpine PXA-H800 / RUX-C800, DLS A4 (bridged), Focal Utopia 6W3 mids & Utopia Tweeters with 165KR2 Crossovers, JL Audio 6w3s in rear doors (currently redundant), DLS A6, JL 12W7 in crap box Focal 46KX4 (free air). Focal Utopia No.7 passive kit in garage awaiting installation with 2x DLS A3

Plans: a little more dynamatting for boot, then all installed properly. Somehow get Utopia No.7 into doors and wire up the crossover.


#10 ta_sjo

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Posted 19 Apr 2016 - 10:41

Is the MOST 150 protocol freely available? A friend of mine specialises in this kind of embedded development work, so if there's enough demand he'd probably be interested in creating a converter/interface.


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#11 MikeFish

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Posted 19 Apr 2016 - 10:42

I don't know the answer to that i'm afraid.


Alpine INE-W928R, Alpine PXA-H800 / RUX-C800, DLS A4 (bridged), Focal Utopia 6W3 mids & Utopia Tweeters with 165KR2 Crossovers, JL Audio 6w3s in rear doors (currently redundant), DLS A6, JL 12W7 in crap box Focal 46KX4 (free air). Focal Utopia No.7 passive kit in garage awaiting installation with 2x DLS A3

Plans: a little more dynamatting for boot, then all installed properly. Somehow get Utopia No.7 into doors and wire up the crossover.


#12 greeef

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Posted 19 Apr 2016 - 13:32

Vector have replied. They said there are 2 ways of achieving what I want using the VN2640 but both would require a PC connected and running.

He said they also do a data logger (that doesn't require a PC to be attached at the time) that works with MOST150 but I can't see any digital outputs that I can use.

Shame that. When i was searching, I found a guy who was doing a masters degree - his final project was to try and extract something from a MOST system. I think it's kinda sad that these manufacturers are introducing a standard that is so inaccessible to aftermarket manufacturers, let alone us home hobbyists. Hopefully they will wise up/someone will figure it out soon.


saab stock radio - eeeuurgh.


#13 MikeFish

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Posted 20 Apr 2016 - 13:33

Had a reply from Audison now:

 

 

We confirm you that the bit DMI is not compatible with MOST150.

 

At the present time, you can install an aftermarket system in your car using our processors, thanks to the high level inputs.

 

Wit regards to the bus MOST150, we would like to inform you that we are considering to enlarge the compatibilities in the future


Alpine INE-W928R, Alpine PXA-H800 / RUX-C800, DLS A4 (bridged), Focal Utopia 6W3 mids & Utopia Tweeters with 165KR2 Crossovers, JL Audio 6w3s in rear doors (currently redundant), DLS A6, JL 12W7 in crap box Focal 46KX4 (free air). Focal Utopia No.7 passive kit in garage awaiting installation with 2x DLS A3

Plans: a little more dynamatting for boot, then all installed properly. Somehow get Utopia No.7 into doors and wire up the crossover.


#14 rivest

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Posted 06 Oct 2016 - 12:19

Guys, the MOST150 protocol is freely available as a PDF here:

 

www.mostcooperation.com/publications/most-book

 

Perhaps someone with electronics knowledge can pick this up and start prototyping soon.



#15 CaleCro

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Posted 15 Oct 2016 - 15:34

Is there on market some device that is converting digital audio signal from 1. gen MOST to s-pdif and that is not expensive as mObridge? 

 

I want to connect BMW NBT to Helix DSP proc via spdif


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#16 drfeelgood

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Posted 16 Oct 2016 - 10:01

I still can't really fathom why on a £30k car, they can't just leave a 20p optical or coaxial digital out somewhere. Or even just a menu option to make it simple rather than almost impossible. I know the vast majority of people never mess around with the stock audio, but to make it this hard for the few enthusiasts for the want of a single plug costing pennies... I'm sure it wouldn't bother BMW or Audi one tiny bit - they would just tell whoever makes their units to stick a digital output on it for free. Meh.

I'm quite used to having liquids running off my chin :raz:


#17 ta_sjo

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Posted 16 Oct 2016 - 10:43

I still can't really fathom why on a £30k car, they can't just leave a 20p optical or coaxial digital out somewhere. Or even just a menu option to make it simple rather than almost impossible. I know the vast majority of people never mess around with the stock audio, but to make it this hard for the few enthusiasts for the want of a single plug costing pennies... I'm sure it wouldn't bother BMW or Audi one tiny bit - they would just tell whoever makes their units to stick a digital output on it for free. Meh.

 

Because for example in 100,000 cars, it'd cost the manufacturer probably a million or so. Only about 50 of those 100k cars would ever actually use the feature. Not commercially viable.


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#18 drfeelgood

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Posted 16 Oct 2016 - 10:52

I know, and I'm looking at it from a seriously one-sided viewpoint. But the only electronics that are EVER tampered with after market are the audio ones, and it just seems so unnecessarily complicated now.

I'm quite used to having liquids running off my chin :raz:


#19 ta_sjo

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Posted 16 Oct 2016 - 11:29

I know, and I'm looking at it from a seriously one-sided viewpoint. But the only electronics that are EVER tampered with after market are the audio ones, and it just seems so unnecessarily complicated now.

 

That's not really true though; ECU's are often tweaked, displays, dash displays etc., are also touched. Manufactures don't like to open up their technology as it causes potential warranty headaches.


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#20 drfeelgood

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Posted 16 Oct 2016 - 12:05

True, but that's quite different to providing a digital out on a digital music player. Sony have been doing it for at least 30 years.

I'm quite used to having liquids running off my chin :raz: