Hi everybody,
this is my first contribution to this nice forum.
I made a midi keyboard interface, with an integrated arpeggiator/sequencer that allows you to play an ordered sequence of the selected notes. You can assign a specific midi channel to each note, each key being colored according to its channel.
The purpose can be:
Quick testing of an orchestration using VST-instruments with a keyboard view;
quick arrangement of an accompaniment; multi-timbral arpeggios.
You can input notes from a keyboard on channel 10, or using messages lists of midi notes. Outlets include lists of selected midi notes.(Please see the help file)
You will need List-abs library and the [show] object.
Please comment and signal any problems!

http://www.pdpatchrepo.info/hurleur/mykeyboard.pd

Hi Paulinho,
I'd like to let you know that I found your patch interesting and pleasantly inspiring. (thanks)