Hydrogen does not compile on my system. It's configure shows that all the supporting software is available on my system, but the make program fails. Three weeks ago I e-mailed the Hydrogen programmer an error report, with all the details, including the complete error message given out by Hydrogen's make file, but I've yet to hear anything back. Now, if you want to de-bug Hydrogen so it runs on my kernel 2.4.26 system you are welcome! I would really like to have it. But as things stand now, the only drum program that runs for me is Trommler. And I really like it.