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  1. #1
    pekka kohonen
    Guest

    Wma decoding issue

    Hi

    As I having been setting up my slim (5.4)/squeeze
    (4.0) environment for some weeks, one specific issue
    has raised up regarding the wma lossless -> wav
    decoding.

    I have ripped a set of cd's with Windows MP10 and when
    I listen them with the system they sound like mono
    recordings. I was wondering if the wma files are
    missing some information and did conversions from wma
    to both wav (with MS utility wmal2pcm) and further
    from wav to flac => they both sound perfect with the
    system.

    Now I am wondering is this a feature with the
    slimserver's decoder or with MP10 and have other
    people had same experiencies.

    I hope I can sort this up with the help of this forum.

    Regards Pekka from Finland




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  2. #2
    NOT a Slim Devices Employee kdf's Avatar
    Join Date
    Apr 2005
    Posts
    9,493

    Wma decoding issue

    Quoting pekka kohonen <pekkakoh (AT) yahoo (DOT) com>:

    >
    > Hi
    >
    > As I having been setting up my slim (5.4)/squeeze
    > (4.0) environment for some weeks, one specific issue
    > has raised up regarding the wma lossless -> wav
    > decoding.
    >
    > I have ripped a set of cd's with Windows MP10 and when
    > I listen them with the system they sound like mono
    > recordings. I was wondering if the wma files are
    > missing some information and did conversions from wma
    > to both wav (with MS utility wmal2pcm) and further
    > from wav to flac => they both sound perfect with the
    > system.
    >
    > Now I am wondering is this a feature with the
    > slimserver's decoder or with MP10 and have other
    > people had same experiencies.
    >
    > I hope I can sort this up with the help of this forum.
    >


    This is a known issue with WMA lossless:
    http://bugs.slimdevices.com/show_bug.cgi?id=761

    If you have any new details that may help, you can post comments there or
    contact support (AT) slimdevices (DOT) com and they can add the details for you.

    -kdf

  3. #3
    NOT a Slim Devices Employee kdf's Avatar
    Join Date
    Apr 2005
    Posts
    9,493

    Wma decoding issue

    Quoting Mike Hartley <mhartley (AT) comsolusa (DOT) com>:

    > kdf,
    > Is this a problem with ALL WMF lossless files, or only some?


    I honestly do not know. My library consists of a 10k tracks, only one of which
    is WMA, old style lossy version at that

    The bug report has a couple of sample files attached, and the comment says it
    may be suspect. I think this kinda screams for more imput. Pekka's comment
    that a track sounded like it was mono is what tipped me off. The report was
    made from support (AT) slimdevices (DOT) com, so I think any more details will have to go
    through there.

    -kdf

  4. #4
    Mike Hartley
    Guest

    Wma decoding issue

    kdf,
    Is this a problem with ALL WMF lossless files, or only some?
    Mike
    ----- Original Message -----
    From: "kdf" <slim-mail (AT) deane-freeman (DOT) com>
    To: "Slim Devices Discussion" <discuss (AT) lists (DOT) slimdevices.com>
    Sent: Friday, February 18, 2005 11:37 AM
    Subject: [slim] Wma decoding issue


    > Quoting pekka kohonen <pekkakoh (AT) yahoo (DOT) com>:
    >
    > >
    > > Hi
    > >
    > > As I having been setting up my slim (5.4)/squeeze
    > > (4.0) environment for some weeks, one specific issue
    > > has raised up regarding the wma lossless -> wav
    > > decoding.
    > >
    > > I have ripped a set of cd's with Windows MP10 and when
    > > I listen them with the system they sound like mono
    > > recordings. I was wondering if the wma files are
    > > missing some information and did conversions from wma
    > > to both wav (with MS utility wmal2pcm) and further
    > > from wav to flac => they both sound perfect with the
    > > system.
    > >
    > > Now I am wondering is this a feature with the
    > > slimserver's decoder or with MP10 and have other
    > > people had same experiencies.
    > >
    > > I hope I can sort this up with the help of this forum.
    > >

    >
    > This is a known issue with WMA lossless:
    > http://bugs.slimdevices.com/show_bug.cgi?id=761
    >
    > If you have any new details that may help, you can post comments there or
    > contact support (AT) slimdevices (DOT) com and they can add the details for you.
    >
    > -kdf
    >

  5. #5
    stevedickie
    Guest

    Wma decoding issue

    The mono problem affected all my WMA lossless files (about 5000).
    It can be solved by replacing the WMADEC file (with an older one (it must be
    pre-5.4, I'm using the 5.3.1 WMADEC file).
    Everything else about 5.4.1 will then work fine including
    AlienBBC (possibly the best plugin yet). I've been using this solution for
    over a month without any problems. The only thing I haven't tried is WMA
    radio, which was probably the reason WMADEC was modified for 5.4.0.
    I think this indicates that the problem lies in the changes made to WMADEC
    when it went from 5.3.1 to 5.4.0. Ive tried everything else I could think of -
    used fresh installs on different PCs, three different squeezeboxes, the
    different audio outputs, etc - always get just mono sound. Its very simple
    just to switch the decoder file and get stereo back but I guess this won't be
    a solution that appeals to everyone.

    Steve

  6. #6
    Senior Member
    Join Date
    Apr 2005
    Posts
    8,410

    Wma decoding issue

    The last change made to wmadec [Oct 20th] appears to be to add mono support (duplicating samples to play it as stereo).

    It's possible that this triggers too often and so is used when lossless files are played back.

    I would add to this bug/raise via slim support that it definately does this for all wma lossless and this can probably be looked at.

    Adrian


    ----- Original Message -----
    From: "stevedickie" <steve_dickie (AT) yahoo (DOT) co.uk>
    To: <discuss (AT) lists (DOT) slimdevices.com>
    Sent: Saturday, February 19, 2005 11:57 AM
    Subject: [slim] Wma decoding issue


    > The mono problem affected all my WMA lossless files (about 5000).
    > It can be solved by replacing the WMADEC file (with an older one (it must be
    > pre-5.4, I'm using the 5.3.1 WMADEC file).
    > Everything else about 5.4.1 will then work fine including
    > AlienBBC (possibly the best plugin yet). I've been using this solution for
    > over a month without any problems. The only thing I haven't tried is WMA
    > radio, which was probably the reason WMADEC was modified for 5.4.0.
    > I think this indicates that the problem lies in the changes made to WMADEC
    > when it went from 5.3.1 to 5.4.0. Ive tried everything else I could think of -
    > used fresh installs on different PCs, three different squeezeboxes, the
    > different audio outputs, etc - always get just mono sound. Its very simple
    > just to switch the decoder file and get stereo back but I guess this won't be
    > a solution that appeals to everyone.
    >
    > Steve
    >
    >
    >

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