Public bug reported:

the audio format for "SNDH Atari ST music" is checked by the string "ICE!"
But ICE is a file packer on the AtariST platform which can pack any data.

If you unpack the ICE format, you get the real SNDH file which can be 
identified with
12     string    SNDH             uncompressed atari SNDH music file

If you want to keep the ICE! definition to say it's SNDH that's fine,
but please add SNDH uncompressed as I showed above.

One sugestions would be to add this, which works in 62% of cases for compressed 
SNDH:
0 string ICE!   atari ICE packed data
>14 search/40 NDH   SNDH music file
>14 search/40 TITL    SNDH music file

The second search is needed because ICE sometimes packes the NDH string
too well, but it still shows the TITL tag :-)

The rest 28% of files I found are very probably not in a proper SNDH
format. They are just compatible with the player but lack a proper
header. Others are packed *twice* with the ICE packer. For this I will
make a bug report to the maintainer of the SNDH files archive.

** Affects: file (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/946696

Title:
  ICE pakcer different from SNDH format

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