One user reported that his NAD unit caused this problem when, in the "Amplifier" page, the "Back amplifier" setting was "Height 1." When set to "Height 2," the problem went away.
Navigate to Speaker Setup > Speaker Levels then press the "TEST" button on the NAD remote followed by "ENTER". You should hear the test tones at the correct speakers. If not please sort that out before trying the Dirac Calibration again
If you are trying to set up Dirac Live on your NAD unit with their included microphone, ensure you are using their newer black dongle. The older white model does not work correctly and can lead to the Missing Samples Error. NAD is aware of this issue and can be contacted about a replacement here: [email protected]
Dongle advice applies to NAD units only.