MiniDSP SLP Q?

[rich31td]

I was just playing around with shelving low-pass filters when I found that MiniDSP is different to entering biquads worked out in the "digital coefficients" spreadsheet.
I am I doing something horribly wrong?😕

SLP-100hz, 10dB, 1Q:

An externally hosted image should be here but it was not working when we last tested it.

 

[rich31td]

Think I worked this out, early versions of the plug-in require Q=1 for 1st order shelf, the spreadsheet assumes Q=0.5 for 1st order shelf.