Discussion
The USB transfer type for streaming audio is
Answer: D
Correct answer: isochronous, which sacrifices retries for guaranteed bandwidth
Audio needs its data on time rather than perfectly, so isochronous transfers reserve bandwidth in every frame and do not retry a failed packet. A lost sample is a click; a retransmitted one arriving late would be a gap. Bulk transfers make the opposite trade, guaranteeing delivery but no timing, which is right for a disk and wrong for a microphone.
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