Updated MIDI Input (markdown)

MIDI-Input.md

@@ -95,6 +95,22 @@ For reference, 1/16th note at 200bpm is 75ms.
 
 ### FAQ
 
+#### Velocity sensitivity
+Depending on how hard you press on a piano key, or how hard you press on a drum pad - velocity information can be sent over MIDI protocol.
+
+There are some important things to note:
+
+* Some low end instruments do not support velocity sensitivity at all. What value they send for velocity is up to the device.
+* Nostalgia does use velocity data, and used for gameplay purposes (yellow and blue zones in recital mode). You can check the velocity in test menu. Read below for binding.
+* drummania does **not** use velocity data, only digital on/off input.
+* FutureTomTom shows velocity data in test menu, but not used in gameplay (maybe loudness?)
+
+#### Nostalgia key binding
+
+If you have velocity-sensitive keys, bind them to `Key 1` `Key 2` etc; spice will transmit velocity information when the game polls for input.
+
+If you don't have velocity-sensitive keys, bind all of them to `Key 1 Medium`, `Key 2 Medium`, etc. This makes the I/O emulation to ignore the actual velocity and instead insert "medium" presses all the time, which satisfies both blue and yellow zones in recital mode.
+
 #### Edit dialog won't show any input
 Make sure the correct device and **MIDI channel** are selected - especially the channel number which can be reset.