Controllers are neat. I&#x27;ve had half a dozen of them of various types. It isn&#x27;t just the controlling part- but the overall interface and instant cross compatibility.<p><i>All</i> of my eurorack modules from different vendors mesh together; plus they play well with my Minimoog Voyager, Machinedrum, guitar pedals (some input&#x2F;output CV). Yea, MIDI kinda allows for this, but really not still in the same instant way.<p>Even modern MIDI devices kinda suck at implementation (see the new Roland Boutique series, which don&#x27;t output MIDI CC from their faders and knobs.. and even if it did, I couldn&#x27;t route an LFO from there into a CV processor on a Korg via MIDI).<p>MIDI is more of a &quot;I wonder if this works and has the bandwidth&quot;, whereas CV is more, &quot;If you see it, you can do anything you want!&quot;