arts should work fine with ALSA, you may need to change some arts settings to have it use ALSA instead of trying to use OSS. It will involve some configuring of arts, though. If you are using KDE, you should be able to change the settings through the control center, under sound server or something like that. If not, there should be some documentation on-line for arts.
Another option may be to use the ALSA OSS emulation, but to enable that you will have to recompile ALSA.
Try googling for 'arts and ALSA' and reading some of the hits, there may have more helpful information.