![Launchpad mk1]{small centre shadow}(LaunchpadMk1_001.png)

#
You can find the specs in the manual. (See [here](https://downloads.novationmusic.com/novation/launchpad-mk1/launchpad)
and [this is the programmer's manual](https://fael-downloads-prod.focusrite.com/customer/prod/downloads/launchpad-programmers-reference.pdf)
```
Top row: CC 0x68,0x69,... (nonzero when pressed, zero when released)
Other rows: 0xXY where X is row number (0-based) and Y is column number.
Send to these CC's and notes to set colour. Colour values are:
bits 0..1 red amount (0 to 3)
bits 4..5 green amount (0 to 3)
everything else 0.
```

## Quirks
The Launchpad uses running status. When powered on, status `0x90` (noteon) is assumed,
so it only sends the two data bytes without the leading `0x90`. Without this, `python-rtmidi`
refuses to recognise the message. So you have to press one of the top buttons, which
generates a CC (that is, status `0xB0`), and then when you subsequently press one of
the other buttons, it generates the leading status of `0x90`. Sometimes the reverse
is the case, and you have to press a non-top button before the top buttons are usable.

## Example Apps
### lp-mpd
I wrote [this simple controller](lp-mpd/V1) for [MPD](/media/player/Mpd). I have 16 instances of MPD.