Although I am satisfied with multitrack recording using Audacity w/ OSS, I would like to give a try to Ardour, Rosegarden and Muse. I have succeed to record some short multitrack songs, but after a few minutes comes a crackling noise on top of the sound. My system has multimedia kernel (2.6.10-1.mm.21 ), distro is Mandrake 10.1, 512 mb of RAM. Jack version: 0.99 (0.99.50-050215.1.mdk10.1.thac), soundcard is Audigy 2 (along with VIA onboard soundcard). I tried with Blackbox and stopped the internet connections, so I guess it couldn't be the cause of memory. Any suggestions & tips worth to try? Thanks.