Loopback+ is a huge one, also USB-C (both on the unit instead of micro-DIN and at the end of the supplied cable for connection). This is from the iRig HD X web pages on our site https://www.ikmultimedia.com/products/irighdx for the full list:
What’s new
Low-noise input with a dynamic range of 115 dB accepts all guitar pickup types, passive or active
USB-C Bus-powered by host device
Elegant, easy-to-use single-knob interface with LED ring
Ultra-fast onboard tuner
Loopback+ virtual FX loop adds professional guitar tone to any app
Includes AmpliTube 5 SE and TONEX SE for Mac/PC
Unlocks TONEX SE plus full version features and gear of AmpliTube for iPhone/iPad (Free download from App Store)
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