That's what I was looking for. It's much simpler than I thought. I have tiped in Xterminal of N900: sudo arecord | aplay then it works as i expected for (N900's mini-jack 3,5 to PC's mini-jack 3,5 = PC with microfone) But, does it waste the space in internal memory of N900 and should i delete recorded file\files from there after?