If Analog Drive is fully analog, then why is there a buffer in the signal flow?

[SynthWizard]

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If Analog Drive is fully analog, then why is there a buffer in the signal flow?

I was just browsing its product page and came across this diagram. Interestingly enough there's a buffer right after the input. AFAIK only in the digital world there are buffers so I found it a bit strange.

If anyone else can shed a light on it then it would be much appreciated.

submitted by /u/justajunior
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