Jose Lopez wrote:

Is it possible?

Yes, but there are some difficulties in terms of setup etc.

http://ardour.org/

Unless you know Unix and are willing to get your hands dirty recompiling
Linux kernels etc its not ready yet. There are however people using this
for real work (after spending a lot of time setting it up).

However, one of the main developers of Ardour is working towards turnkey
solutions when Ardour itself stabilizes sufficiently.

At what cost?

If you set it up yourself, its only costs you for your own time.

Erik
--
+-----------------------------------------------------------+
Erik de Castro Lopo (Yes it's valid)
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"Some people don't want genitalia shoved down their throats."
-- Rex Mossop, Australian football commentator and morals crusader