I just got an email from Henrik Herranen at VLSI.
He's checked the files I sent, and found the source of the problem.

The mail explains that the problem is NOT the decoder. It's a problem
with erroneous headers in some songs.

Read it here :
http://www.myplace.nu/mp3/vs1001_mail.htm

I've modified the problem files according to this, and it works perfectly.

/Jesper


--
* * * Visit Jesper's AVR pages * * *
http://www.myplace.nu/avr

Hi Erik,

You must have a problem with your design.

I've downloaded and tried ALL the compliance testfiles from Fraunhofer.

There was NO PROBLEM on neither my yampp-3 or on the VLSI reference
player. All files play as expected.


It has nothing to do with files starting with 00 00 20, but has to do with
"fake"
MP1 headers or similar in the datastream BEFORE a valid MP3 header.
Please read Henrik Herranens mail again.


/Jesper


--
* * * Visit Jesper's AVR pages * * *
http://www.myplace.nu/avr
* * * * * * * * * * * * * * * * * * * * * * *


"Erik Hermann" <erikhermann_removethis_@yahoo.com> wrote in message
news:tAcB6.3983$FY5.279123@www.newsranger.com...
> In article <EX2B6.6737$4N4.1468187@newsc.telia.net>, Jesper Hansen says...
>
> >The mail explains that the problem is NOT the decoder. It's a problem
> >with erroneous headers in some songs.
>
> Well, none of my problematic files begins with 00 00 20.
> Please download
> ftp://ftp.tnt.uni-hannover.de/pub/MPEG/audio/mpeg1/compliance/layer3.tar.gz
> It contains several official mp3 testfiles from Fraunhofer.
> Try to play the file sin1k0db.bit. (You may have to rename it to .mp3)
> It contains a 1kHz 0dB sinus signal and plays with all software decoders
> I have on my system (including mpg123 and mp3blaster for linux).
> But it doesn't play on the vs1001.
>
> cu
> Erik
>
>