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igrushka: The FAQ suggested to install libasound2, which I did (both the native and i386 version). I also searched the Internet, but failed to find a solution. Suggestions anyone?

The .acm files can by played normally.

Thanks in advance.
Hello igrushka,

You need to install OpenAL dependency, as stated on the product page:

"Requires the following packages to be installed: libopenal1"