Firstly I apologize if this question is answered elsewhere but I've searched and haven't found it.
I have an intergrated sound card in my computer and it's never given me any problems. I've never felt the need to purchase a dedicated sound card because all I do is listen to music, as opposed to recording or editing sounds.
So my question is: Can a lack of dedicated sound card cause emulation problems/slowdowns?
The reason I'm asking is because in some games, such as Legend of Zelda: Majora's Mask, regardless of what audio plugin I use, the sound skips and breaks. Something that's really strange is that Jabo's direct sound 1.6 plugin actually acts as a mute plugin- I get no sound whatsoever with that plugin, whether or not I change the volume level or click for it to sync the audio to the game. Could this be due to a lack of a soundcard?
Thanks for the help! (My computer's specs should be in my profile/signature if it helps.)