diff --git a/Pinout/2021-08-14_10-27-48_screenshot.png b/Pinout/2021-08-14_10-27-48_screenshot.png
new file mode 100644
index 0000000..02cfb93
Binary files /dev/null and b/Pinout/2021-08-14_10-27-48_screenshot.png differ
diff --git a/Pinout/2021-08-14_10-28-26_screenshot.png b/Pinout/2021-08-14_10-28-26_screenshot.png
new file mode 100644
index 0000000..d211e21
Binary files /dev/null and b/Pinout/2021-08-14_10-28-26_screenshot.png differ
diff --git a/Pinout/2021-08-14_10-28-49_screenshot.png b/Pinout/2021-08-14_10-28-49_screenshot.png
new file mode 100644
index 0000000..9d60510
Binary files /dev/null and b/Pinout/2021-08-14_10-28-49_screenshot.png differ
diff --git a/Pinout/2021-08-14_10-29-29_screenshot.png b/Pinout/2021-08-14_10-29-29_screenshot.png
new file mode 100644
index 0000000..5f7bce1
Binary files /dev/null and b/Pinout/2021-08-14_10-29-29_screenshot.png differ
diff --git a/Pinout/2021-08-14_10-29-44_screenshot.png b/Pinout/2021-08-14_10-29-44_screenshot.png
new file mode 100644
index 0000000..be4dc40
Binary files /dev/null and b/Pinout/2021-08-14_10-29-44_screenshot.png differ
diff --git a/ltximg/org-ltximg_f5e9c8783c2b1ef815fc7bbbaa70c21e24aec97f.png b/ltximg/org-ltximg_f5e9c8783c2b1ef815fc7bbbaa70c21e24aec97f.png
new file mode 100644
index 0000000..6f9b0f8
Binary files /dev/null and b/ltximg/org-ltximg_f5e9c8783c2b1ef815fc7bbbaa70c21e24aec97f.png differ
diff --git a/project.org b/project.org
index 501e225..6108751 100644
--- a/project.org
+++ b/project.org
@@ -1,4 +1,5 @@
 * Pinout
+** Keyboard.
 | Header | Arduino | Name | Function | Color  |
 |--------+---------+------+----------+--------|
 |      1 | A0      | KD1  | S1       |        |
@@ -16,3 +17,30 @@
 |     13 | D8      | SA5  | Mult 2   | Black  |
 |     14 | 5V      | 5V   |          | White  |
 |     15 | 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 | Name | Function | Color          |
+|--------+---------+------+----------+----------------|
+|      2 | GND     | GND  |          | Brown          |
+|      4 | D9      | SSTE | Sustain  | Violet and Red |
+
+
+#+DOWNLOADED: screenshot @ 2021-08-14 10:27:48
+[[file:Pinout/2021-08-14_10-27-48_screenshot.png]]
diff --git a/resources/KSP10, KSP20, KSP30.pdf b/resources/KSP10, KSP20, KSP30.pdf
new file mode 100644
index 0000000..bf3ce57
Binary files /dev/null and b/resources/KSP10, KSP20, KSP30.pdf differ
diff --git a/resources/multiplexer.pdf b/resources/multiplexer.pdf
new file mode 100644
index 0000000..f06757c
--- /dev/null
+++ b/resources/multiplexer.pdf
@@ -0,0 +1,36 @@
+--2021-08-14 10:30:55--  https://www.ti.com/lit/ds/symlink/sn74ls138.pdf
+Resolving www.ti.com (www.ti.com)... 23.63.112.239, 2a02:26f0:300:194::b48, 2a02:26f0:300:1a3::b48
+Connecting to www.ti.com (www.ti.com)|23.63.112.239|:443... connected.
+HTTP request sent, awaiting response... 200 OK
+Length: 1315129 (1.3M) [application/pdf]
+Saving to: ‘sn74ls138.pdf’
+
+     0K .......... .......... .......... .......... ..........  3%  762K 2s
+    50K .......... .......... .......... .......... ..........  7% 2.82M 1s
+   100K .......... .......... .......... .......... .......... 11% 3.87M 1s
+   150K .......... .......... .......... .......... .......... 15% 4.53M 1s
+   200K .......... .......... .......... .......... .......... 19% 5.04M 0s
+   250K .......... .......... .......... .......... .......... 23% 7.35M 0s
+   300K .......... .......... .......... .......... .......... 27% 13.9M 0s
+   350K .......... .......... .......... .......... .......... 31% 10.9M 0s
+   400K .......... .......... .......... .......... .......... 35% 14.1M 0s
+   450K .......... .......... .......... .......... .......... 38% 10.8M 0s
+   500K .......... .......... .......... .......... .......... 42% 10.8M 0s
+   550K .......... .......... .......... .......... .......... 46% 14.3M 0s
+   600K .......... .......... .......... .......... .......... 50% 13.4M 0s
+   650K .......... .......... .......... .......... .......... 54% 8.60M 0s
+   700K .......... .......... .......... .......... .......... 58% 14.2M 0s
+   750K .......... .......... .......... .......... .......... 62% 14.6M 0s
+   800K .......... .......... .......... .......... .......... 66% 10.4M 0s
+   850K .......... .......... .......... .......... .......... 70% 14.4M 0s
+   900K .......... .......... .......... .......... .......... 73% 11.1M 0s
+   950K .......... .......... .......... .......... .......... 77% 10.7M 0s
+  1000K .......... .......... .......... .......... .......... 81% 14.1M 0s
+  1050K .......... .......... .......... .......... .......... 85% 11.0M 0s
+  1100K .......... .......... .......... .......... .......... 89% 10.7M 0s
+  1150K .......... .......... .......... .......... .......... 93% 14.3M 0s
+  1200K .......... .......... .......... .......... .......... 97% 10.5M 0s
+  1250K .......... .......... .......... ....                 100% 27.7M=0.2s
+
+2021-08-14 10:31:03 (6.22 MB/s) - ‘sn74ls138.pdf’ saved [1315129/1315129]
+