Key to upgrade your copy of SoundID Reference for Headphones to SoundID Reference for Speakers & Headphones. Digital upgrade key delivered electronically. Will require Sonarworks measurement microphone purchased separately

SoundID Reference is a calibration software for your studio headphones or monitors. It adjusts the frequency response of a specific model or piece of audio equipment so that it has the smoothest possible curve, thus achieving maximum sound neutrality for reliable analytical effect and use.

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https://www.sonarworks.com/soundid-reference/download

INFO
https://www.sonarworks.com/soundid-reference