Added katex for no good reason

VoltageStandards.md

@@ -33,9 +33,8 @@ An easy way to do this is to use `PulseGenerator` from `digital.hpp`.
 
 ### Pitch
 
-Most Eurorack manufacturers have decided on the **1V/octave** standard. The relationship between frequency and voltage is thus `f = f0 * powf(2.f, pitchVoltage)`.
-
-If you need a default pitch for your oscillator with initial knob positions and 0V at the pitch input, use C4 (`f0 = 261.626 Hz`).
+Most Eurorack manufacturers use the **1V/octave** standard.
+The relationship between frequency $$f$$ and voltage $$V$$ is $$f = f_0 \cdot 2^{V}$$, where $$f_0$$ is an arbitrary baseline set by a pitch knob or the note C4 ($$f_0 =$$ 261.626 Hz).
 
 ### NaNs and Infinity
 

book.json

@@ -1,7 +1,8 @@
 {
   "plugins": [
     "insert-logo-link",
-    "github-edit"
+    "github-edit",
+    "katex"
   ],
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     "insert-logo-link": {