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Missing music/folders using USB on MEX-BT3900u

Topic started on Jun 22, 2011 2:30 PM , last reply on Jun 10, 2012 6:37 PM

in Audio > Car Audio
geoffinbolton
4 posts since
Jun 22, 2011

I have a  MEX-BT3900u and am very happy with it apart from an issue were not all music on usb memory stick is seen by the unit.

 

I have a verbatim 8GB low profile stick that I leave perminantly plugged in, that currently has 70 top level folders and 504 folders in total containign 1219 files coming to 7.1GB.

 

The head unit only sees the first 51 folders, i've created a test with 150 top leve folders on a blank stick and they are all read.

 

I'd read somewhere that the format of the music is important, however, in my case music that cant be seen, can be when folders above it are deleted.

 

This is quite frustrating as I cant find the pattern to fix this, does anyone know what causes this?

 

Thanks


Geoff


  • ciberboynuno
    ciberboynuno
    3 posts since
    Feb 19, 2012
    Written on Feb 19, 2012 6:11 PM

    I have the exact same problem , and no answer from Sony.

     

    They have to release a firmware update for this radio.


    • Reply
  • facade
    4 posts since
    Oct 24, 2010
    Written on Mar 3, 2012 3:04 PM

    Hi,

    I have the same problem here.

     

     

    Some folders it sees, others it won't see.

     

    I tried renaming the files to shorten the filename and remove any character that wasn't a letter or a space, no difference.

    I even edited out the artist name from the id3 tag, in case the unit is rejecting sony artists, no difference.

    I deleted the album artwork from the tag, no difference

     

    This file it won't see

     

    Payload Size: 9880555 bytes
    Header found at: 3752 bytes
    Enc Delay: 576, Zero Padding: 1800
    Length: 246 seconds
    MPEG-1 layer 3
    320 kbps, 9456 frames
    44100 Hz Joint Stereo

     

    CRC: No, Copyrighted: No
    Original: Yes, Emphasis: None

     

    This one it will

     

    Payload Size: 5767163 bytes
    Header found at: 67900 bytes
    Enc Delay: 576, Zero Padding: 924
    Length: 228 seconds
    MPEG-1 layer 3
    202 kbps (VBR), 8733 frames
    44100 Hz Joint Stereo

     

    CRC: No, Copyrighted: No
    Original: No, Emphasis: None

     

    It isn't just that 320k files are not recognised is it?

     

     

    Pity there is no data in the speceifications...........


    • Reply
  • mbrotto
    1 posts since
    May 13, 2012
    Written on May 13, 2012 10:25 AM

    Hi,

    I have got the same issue.

    Is there a work around yet?

    cheers


    • Reply
  • vskivanov
    vskivanov
    2 posts since
    May 27, 2012
    Written on May 27, 2012 8:38 AM

    It's not about the 320kbs bitrate, because i've transcoded some 320kbs and 128kbs to 256kbs and it still doesn't see them. In fact I believe it's an error while the unit is scanning the usb device and not seeng entire folders. However it sees the USB system folders that contains some executables and PDF files... It's not the first issue I have with this unit, as it would pass  calls only while listening to radio. Even after changing the unit... The support rep of Sony was kind, but useless.


    • Reply
  • vskivanov
    vskivanov
    2 posts since
    May 27, 2012
    Written on May 27, 2012 8:29 PM

    Looks like I've solved the problem.

    As stated in the users manual, the unit supports UP TO 128 folders (including subfolders!) with 500 files in each one. When usb drive is inserted in the unit it scans it and when it reaches the 128th folder it stops. Any folders added further won't be read. The quick and dirty solution is to put all e.g. 20 albums of a band in a single folder. I'll leave comments to you...

    Pity that the Sony support couldn't explain that and I had to spend much time and efforts to figure it out myself.


    • Reply
  • ciberboynuno
    ciberboynuno
    3 posts since
    Feb 19, 2012
    Written on Jun 10, 2012 6:37 PM

    Hello to all

     

    I confirm the results posted by vskivanov.

     

    I developed a tool that counts folders and files (and for each subsfolder), and it revealed that I had 275 folders. As soon as I reorganized the MP3 to 126 folders, the radio was able to "see" all the folders.

     

    However, I was not able to test the number of files limit. I can only tell that I have in total inside the USB drive 1636 files.

     

    If you need the tool that I developed, I am happy to provide the source code (contact by email).

     

    Thanks


    • Reply

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