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The external USB sound card doesn’t always work because the USB supply voltage can vary with processor CPU. You need to use a USB headphone output with good iso

• stan_rogers 8y ago
  ...which is still a "USB sound card", no matter how you choose to look at it. It still needs to be a combined DAC and headphone amplifier in addition to being a set of 'phones. Personally, I use an Audioquest Dragonfly USB DAC/headphone amp, which gives me the option to use either headphones (of my choosing) or speakers. (And unlike a larger "breakout box" USB sound card, it's quite portable, being about the same size and shape as USB thumb drives used to be.) It's a good fit for me, but if you need mic input, there are other devices - or you can still use the mic in of your regular sound card/integrated audio.