Audio Interface
Focusrite Scarlett 2i2 (3rd Gen)
Two-channel USB audio interface — what the SM58 needs to talk to the laptop, and what makes the headphones sound right.
An XLR microphone needs an interface to talk to a laptop. The Scarlett 2i2 is the two-channel USB interface that does the conversion — two combo inputs for mic or instrument, phantom power for condensers, dedicated headphone output with its own gain stage, and the build quality that's made the Scarlett line the default first-interface recommendation for over a decade.
Bought for the SM58 — the microphone is XLR, the laptop has no XLR input, the math writes itself — and the side benefit was that the headphone output drives the DT 770 Pro 80-ohm cleanly where the laptop output couldn't. One purchase, two upgrades.
The Air mode on the third-gen Scarletts — the optional high-frequency boost — is more useful with condensers than with a dynamic like the SM58. For the typical use case here — voiceover into Premiere or Audition — the interface stays out of the way, which is what an interface is supposed to do.