The measurement distortion is very high error

[miketunes]

I'm using a UMM-6 Microphone with exclusive java driver. When I measure sweep I get this warning, is it something I should address? I'm using Beta58.
The measurement distortion is very high, 12.6%. The level may be too high somewhere along the signal path. Below is the distortion graph:

 

[John Mulcahy]

It looks ok, the message is probably due to the low frequency roll off, where the signal gets close to the noise floor. You can adjust the graph range using the limits button at the top right.

 

[dcibel]

Don't expect low distortion at 10Hz...limit frequency range of the measurement will prevent the high distortion warning. Where you've placed your cursor at 114Hz, THD is 0.2%. But...noise floor is higher than distortion level, so you may want to make it louder. Overall tonality looks quite bass heavy / bloated with 90dB through bass region and 60dB at 10kHz.

Change that y-axis scale to something sane, it'll be easier to review...