mention required Arduino libraries

README.md

@@ -12,6 +12,11 @@ The device has six voices, which can each produce a single square wave tone at a
 
 New firmware can be uploaded using the Arduino IDE and the aforementioned [board definition](https://github.com/ucsbieee/ArduinoCore-SAM3A4C), or the [latest release](https://github.com/ucsbieee/Tesla-Coil-MIDI-Synth/releases/latest) (`.bin` file) can be uploaded using [BOSSA](https://github.com/shumatech/BOSSA) ([available from Homebrew](https://formulae.brew.sh/formula/bossa)).
 
+### Arduino Library Dependencies
+Available from the Arduino IDE library manager
+ * [MIDIUSB](https://github.com/arduino-libraries/MIDIUSB)
+ * [DueFlashStorage](https://github.com/sebnil/DueFlashStorage) (only if `SAVE_BASE_MIDI` is enabled, which it is not by default)
+
 ## Emulator
 
 There is also an emulator that can be compiled to run on a normal computer so that songs can be developed without the physical hardware.