Playing two different MP3 files at the same time?

[patrick]

Does anyone have any experience with multiple sound cards in a PC
running Fedora? I'm wondering if there's any sort of practical limit
besides the number of ISA or PCI slots in a machine? And more
specifically, let's say you have 3 or 4 sound cards and an
adequately-powered machine, would Linux have any trouble playing
different MP3 files to each card?

Thanks,

Patrick