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pekka kohonen
2005-02-18, 08:00
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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kdf
2005-02-18, 09:37
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

kdf
2005-02-18, 12:28
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

Mike Hartley
2005-02-18, 12:36
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
>

stevedickie
2005-02-19, 04:57
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

Triode
2005-02-19, 05:50
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
>
>
>