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+## Wat
+
+This pcb is an audio multiplexer, meaning it can switch three analog inputs into one analog output. 
+
+## Why
+
+Sometimes you just need more inputs. And this is how you do it.
+
+## How
+
+The BD3491 does all the audio switching. It combines one 6 input switch and an equalizer into a simple package. 
+The STM32 configures the BD3491 to switch to the specified inputs based on pressed buttons or software control.
+
+