Does the microphone have to be vertical?

You can freely rotate the microphone in 360 degrees, as long as it's facing you.

Is it okay to see the yellow indicator while speaking?

Yes; the yellow indicator is completely acceptable. It informs you that you're at the top of what your sound level should be. If you see red, turn down the microphone gain or position yourself slightly further from the microphone until it only reaches the yellow indicator.

Any tips for setting it up with a boom arm adapter?

When inserting the thumbscrew into the boom arm adapter, note a small groove on the inner ring of the thumbscrew. Align it with a notch that's on the inner part of the boom adapter. Rotate the thumbscrew until it lines up. Refer to the included Product Information Guide for additional instruction.

How do I setup the Alias in Sonar for Streamers software?

This is the default setup for Alias in the Sonar for Streamers Software: PERSONAL MIX Speakers (SteelSeries Alias) STREAM MIX SteelSeries Sonar - Stream (SteelSeries Sonar Virtual Audio Device) MIC INPUT Microphone (SteelSeries Alias)

How can I hear sidetone?

In order to hear sidetone (your voice in real time), you need a wired connection. Plug in a wired headset and connect it to the Alias via a 3.5mm cable.

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Alias

3X BIGGER CAPSULE — USB-C condenser mic captures a wide vocal range with a capsule up to 3X larger than other mics
LED LEVELS — Stay in control of your stream with a quick glance at Alias, which displays audio levels and mute status
ALL-in-1 SOFTWARE SOLUTION — Sonar for Streamers is the total pro streaming package, with audio mixing, easy drag 'n' drop app routing, and AI noise cancellation (free download)
SHOCK-MOUNT — Reduces unwanted vibrations for clearer sound, compatible with desktop stand or boom arm (sold separately)
RGB DOWNLIGHT — Customize an ambient RGB to sync with your other devices, plus change the colors of the level meter LEDs