okay-there is no 'sound card' as such (as far as I know) . There may be onboard sound, but nothing user-replaceable. to check if it's working, go into preferences, then sound, then, select line out, connect speakers, play something and it should work. If not, mess around with Audio MIDI setup, and ensure that you have 44khz, 16 bit stereo output.
USB Sound Card 7.1 Channel BENGOO USB Audio Headset Headphone Aux Adapter with USB to 3.5mm Audio and Microphone Jack, External Stereo Sound Card for Gaming Headset, Windows, Laptops, PC, Mac, PS4 5.0 out of 5 stars 7. If the sound has stopped working on your Mac follow these steps to help you get your Mac's internal speakers working again. If when you press the volume controls (usually F11 and F12) they appear.Laptop External Sound Card
then do a test on your speakers, then save, then quit Audio MIDI setup. that may fix things. According to M-Audio's website (I think that's who makes the delta 1010), you'd need a PC or G4/G5 with a free PCI/PCI-X slot. Mac Pro will not work, and neither will a MacBook Pro. you'll be needing something firewire based, I'd suspect. plus maybe GarageBand or something along those lines. Sadly, the crystal ball has gone dark and that's all I have for now. But-Mac Pro big, Mac Pro tower, Mac Pro hard to carry. Macbook Pro not that big, Macbook Pro not tower, Macbook Pro not hard to carry.