Hi Eelke, 

Sorry, I've been very busy the last week.  It seems like you're making good 
progress! Not bad for your first project. 

*In answer to your previous questions:*
In simple terms, the on_draw method is called whenever you press a key or 
resize the window.  This is an "event driven" programming style, and it 
works well for GUI applications. After all, the screen does not need to be 
updated if nothing changes. 
For more graphical applications, such as games, you want a steady update 
(such as 60fps). To do that, just use the `pyglet.clock.schedule_interval` 
function. This will cause the window to be redrawn as necessary. 

For graphical effects, you could do it with Sprites. You could also do it 
with OpenGL shaders, but it will require some knowledge of shader 
programming. I would recommend you skip this step for now, and come back to 
it after the functionality is more complete. 

For reading your physical Midi device, it seems that `mido` is popular 
these days. Mido uses the rtmidi or portmidi backends. It will require you 
to install that library as well.
As a first step, I would try to create a small program that will read your 
keyboard, and print your key presses out to the console. After you have 
that working, it should be pretty easy to implement it into your pyglet 

I think I have an old Midi keyboard laying around. I might give it a try as 

On Monday, March 5, 2018 at 2:42:48 PM UTC+9, Eelke Johnson wrote:
> <https://lh3.googleusercontent.com/-kR9Uo8Pi07Y/WpzWz1wsGnI/AAAAAAAAAFk/K0yyJZsCiOg5o0-OyI2RUFxSHYoWMoQXwCLcBGAs/s1600/capture.png>
> Hi community,
> I updated my small project. I reviewed how my code works and I implemented 
> chord lines between notes.
> Now, I need your suggestions :)
> I want to improve the visual part with a glow effect when a note is played 
> like in the software synth├ętisa. have you any idea how to implement it?  I 
> listen to your commentaries and if you have another good idea I take it!
> My second challenge is to implement it with my midi keyboard. There isn't 
> many documentation available online. Do you have any ressources for a 
> pyglet program who use midi input?
> Thank you for your support :D I'm proud of the result and I hope I can 
> keep it moving straight forward !
> Eelke (way2key)

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