* Pinout
** Keyboard
| Header | Arduino Nano | Pro Micro | PM NR | Name | Function | Color  |
|--------+--------------+-----------+-------+------+----------+--------|
|      1 | A0           |        RX |     0 | KD1  | S1       | Grey   |
|      2 | A1           |        TX |     1 | KD2  | S1       | Purple |
|      3 | A2           |         2 |     2 | KD3  | S1       | Brown  |
|      4 | A3           |         3 |     3 | KD4  | S1       | Orange |
|      5 | A4           |         4 |     4 | KD5  | S2       | Red    |
|      6 | A5           |         5 |     5 | KD6  | S2       | Grey   |
|      7 | D2           |         6 |     6 | KD7  | S2       | Yellow |
|      8 | D3           |         7 |     7 | KD8  | S2       | Purple |
|      9 | D4           |         8 |     8 | SA1  | Select A | White  |
|     10 | D5           |         9 |     9 | SA2  | Select B | Black  |
|     11 | D6           |        14 |    14 | SA3  | Select C | Blue   |
|     12 | D7           |        15 |    15 | SA4  | Mult 1   | Orange |
|     13 | D8           |        16 |    16 | SA5  | Mult 2   | Black  |
|     14 | 5V           |        5V |       | 5V   |          | White  |
|     15 | GND          |       GND |       | GND  |          | Yellow |

See [[file:resources/KSP10, KSP20, KSP30.pdf][service manual]].
#+DOWNLOADED: screenshot @ 2021-08-14 10:28:26
[[file:Pinout/2021-08-14_10-28-26_screenshot.png]]

#+DOWNLOADED: screenshot @ 2021-08-14 10:28:49
[[file:Pinout/2021-08-14_10-28-49_screenshot.png]]
*** Mulitplexer

#+DOWNLOADED: screenshot @ 2021-08-14 10:29:29
[[file:Pinout/2021-08-14_10-29-29_screenshot.png]]


#+DOWNLOADED: screenshot @ 2021-08-14 10:29:44
[[file:Pinout/2021-08-14_10-29-44_screenshot.png]]

See [[file:resources/multiplexer.pdf][pdf]].
** Pedals
With $2k\Omega$ resistors.
| Header | Arduino | Pro Micro | Name | Function | Color  |
|--------+---------+-----------+------+----------+--------|
|      2 | GND     | GND       | GND  |          | Blue   |
|      4 | D9      | A3/21     | SSTE | Sustain  | Violet |


#+DOWNLOADED: screenshot @ 2021-08-14 10:27:48
[[file:Pinout/2021-08-14_10-27-48_screenshot.png]]