Hi Christian,

Thank you so much for getting back to me! Yeah, I contacted Audi, who told me 
to contact my local dealer, who told me that there is no MMI firmware upgrade 
to play FLAC files.  I found that hard to believe, so that's why I reached out 
to the FLAC community to see if there was someone out there has worked on Audi 
MMI systems. 

Again, thanks for getting back to me!

Cheers,
Elio

> On May 11, 2017, at 8:50 AM, Cristian Adam <cristian.a...@gmail.com> wrote:
> 
> 
> 
>> On Wed, May 10, 2017 at 4:45 AM, elio manes <elioarma...@optonline.net> 
>> wrote:
>> Hello,
>> 
>> 
>> I am hoping that perhaps you know the answer to my car audio question, or 
>> can at least point me in the right direction.  I own a 2013 Audi S4 that has 
>> the 3G-Plus Multi Media Interface (MMI) with the Bang & Olufsen Sound System.
>> 
>> 
>> The MMI is able to playback lossy, compressed audio files (MP3, WMA and 
>> AAC), but does not have native support for FLAC, ALAC, or WMA Lossless. 
>> However, I've read that the MMI system in other 2013 Audi models do have 
>> native support for playing back lossless FLAC and WAVE files.
>> 
>> 
>> Is there some type of FLAC decoder “plug-in” that I can download (or save on 
>> to an SD card) that I can then “flash” onto my car’s MMI software so that it 
>> could playback FLAC files?
>> 
>> 
>> As I understand it, the MMI employs programmable processors and runs on a 
>> Unix-like RTOS (Real Time Operating System) that can be updated using a SD 
>> card/USB/CD containing the software.  MMI software update menu enables 
>> import/export settings saved as an AES (Advanced Encryption Standard) 
>> encrypted zip file.
>> 
>> 
>> Audio files can be played back on the MMI via various drives: two SD card 
>> readers, a CD/DVD drive, iPod (MDI), USB, Aux-in, as well as by Bluetooth 
>> Streaming and WiFi hotspot. However, I would be happy just being able to 
>> play back FLAC files off the SD card reader!
>> 
>> 
>> 
>> I'm a bit of an audiophile and am enjoying the Bang & Olufsen Sound System 
>> in my S4. It would be a shame to have two SD card slots on the MMI - each 
>> capable of holding up to 32 GB of music! - and only be able to play off them 
>> “lossy” audio files.
>> 
>> 
>> Any thoughts/suggestions that you have would be greatly appreciated.
>> 
>> 
>> 
>> Thanks,
>> 
>> Elio
>> 
> 
> Hi Elio,
> 
> FLAC devs can't do anything about this.
> 
> You should talk to Audi. But I wouldn't hold my breath if I were you.
> 3G-Plus MMI is old and most probably only in maintenance mode.
> 
> Audi is using QNX as their "Unix-Line RTOS" OS, which is
> proprietary nowdays and developing something for the Audi MMI
> is impossible for 3rd parties.
> 
> Cheers,
> Cristian.
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