How to use speaker corrections with AMP2

I'm trying to use the speaker corrections for http://noaudiophile.com/DSP_Corrections/Polk_OWM3.php which I have successfully used (via https://github.com/bmc0/dsp/wiki/System-Wide-DSP-Guide) on my own RPi4 with amp running stock Raspbian with my current Snapcast setup. 

I'm experimenting with HiFiBerryOS on another RPi4 with Amp2 (hifiberry-dacplus) and wanting to use the same corrections for the same speakers, however I see under Settings -> Sound -> DSP it won't allow any kind of corrections upload. Do I need to manually install the Alsa/Pulse LADSPA plugin in order to use the speaker corrections? 


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