[Hampshire] Music software Recommendations

Hi all

Just mucking about really I thought I might turn my hand to some music - haven't done so since way back on the Amiga more years ago than I care to remember. The tool of choice then was something called protracker - anybody know what I should be searching for nowadays? Not knowing the search term is proving an obstacle.

The sort of thing I'm after is an x channel (it was 4 but I'm sure more are possible thesedays) digital recorder where you start with your drums, get them to loop, add your base, cymbols, hihat etc etc.

Should I' be searching for a tracker, a sequencer?? Anybody used a good one on Linux? FWIW I only have onboard sound but I don't suppose that'll matter much.

Cheers
Rob