Can SB128 play simulaneous wav files?

[luderob]

Hi, I recently had to switch my SBLIVE for my dads SB128 because of problems the LIVE! was causing with my 87KA. Now, I can't play 2 wav files at the same time. e.g., while playing mp3's and hearing my aim. I thought the SB128 could do that? If so, is there an option i gotta turn on. If not, oh well I guess.