::  Posts  ::  RSS  ::  ◂◂RSS  ::  Contact

Game Controller MIDI

June 20th, 2018
music  [html]
Expression controllers can make synthesized instruments sound much better, but they're generally pretty expensive. For example, the breath controller I've been playing with cost me EUR 132. There's nothing fundamentally expensive about it, just a low volume product. Which got me thinking: is there some commonly mass produced device that gives a smooth range of outputs? What about a game controller?

I've never been into console gaming so I don't know much about controllers, but after looking at some pictures it looked like the PS4 one is well laid out for joystick use, so I ordered one ($26, shipped):

It connects via USB, and pygame can read from it out of the box:

>>> import pygame
>>> pygame.init()
(6, 0)
>>> j = pygame.joystick.Joystick(0)
>>> j.init()
>>> while True:
...   for event in pygame.event.get():
...      print(event)
...
<Event(7-JoyAxisMotion {
  'joy': 0,
  'value': 0.003906369212927641,
  'axis': 0})>
<Event(7-JoyAxisMotion {
  'joy': 0,
  'value': -1.000030518509476,
  'axis': 4})>
...

Since music is so latency sensitive (though maybe not for expression controllers?) I didn't want to have to go via python, so I decided to write something small against the OSX native API. The docs for the native API are pretty annoying, so the SDL source was a helpful guide.

It's ready and working, and you can try it out:

  • Build it from source (github):

    $ git clone https://github.com/jeffkaufman/gcmidi.git
    $ cd gcmidi
    $ make run
    
  • Download a binary:

    $ wget https://www.jefftk.com/gcmidi
    $ chmod ugo+x gcmidi
    $ ./gcmidi
    
It presents as a virtual MIDI controller named "game controller" with ten continuous controller outputs on CC-20 through CC-29.

Comment via: google plus, facebook, r/WeAreTheMusicMakers

Recent posts on blogs I like:

Absolute scale corrupts absolutely

The Internet has gotten too big. Growing up, I, like many computery people of my generation, was an idealist. I believed that better, faster communication would be an unmitigated improvement to society. "World peace through better communication,"…

via apenwarr August 19, 2019

Traces

At naptime Anna listens to recordings of novels recorded by Jeff’s grandmother. It is the main way she will know Winnie, as it is the main way I have ever known Winnie. Some of the recordings are missing parts, and Suzie often fills in the first few sente…

via The whole sky August 18, 2019

One Night Ultimate Werewolf

I really like One Night Ultimate Werewolf (ONUW), and recommend trying it out. The Daybreak expansion is also good (but I’d skip the later games in the series). App For those who’ve played a lot and wish the night took 20 seconds rather than a few minutes…

via The sideways view August 18, 2019

more     (via openring)

More Posts:


  ::  Posts  ::  RSS  ::  ◂◂RSS  ::  Contact