whk, thanks for the answer, but I solved my problem ... just changed freespire
I do not understand ALSA and JACK architecture, and that's why I try not to play with them much, but ... the driver that have to control the device (intel8x0) does not even recognize it (not a row in dmesg), and I just have not /dev/dsp.
After some days fighting, I found other things that I don't like ... and so I resolved my problems generally - just downloaded Archlinux, and now all is working like a charm.
Thanks again for your reply. I'll read some more for alsaconf (and architecture), as well as JACK's.
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Hridi