The APx KeyBox

APx Continuous Sweep with Open Loop Settings Higlighted

Audio Precision’s next release of APx500 audio measurement software, version 4.6, is now available and includes the following new features:

  • – Open-loop log-swept sine chirp measurements
  • – Multichannel input equalization
  • – DTS:X support
  • – AAC MPEG2 CODEC support (requires Bluetooth® Duo module)
  • – Automated import of measurement equalizations




This new release also includes a new requirement – an APx KeyBox. Users wishing to operate their APx audio analyzer with version 4.6 will need to request a KeyBox for each APx analyzer they own. Key items to note regarding the APx KeyBox:

  • – Provided at no cost
  • – Must be requested (see “request” link below)
  • – Is required to run APx v4.6 or later
  • – Is locked or matched to a specific analyzer serial number
  • – Is shipping with each new instrument

Request your APx KeyBox

For additional information on the APx KeyBox, please see: