Arch Linux

Ineluki

Member

Registered: 2009-10-25

Posts: 5

midi keyboard issue

Hello,

I bought this midi controller: http://www.rogerlinndesign.com/linnstrument.html and I'm having problems with it.
It's detected without any issues and it sends notes correctly but once in a while it sends 2 notes at once (causing one of them to be stuck).
It works correctly on windows and mac without any drivers (it should be  class-compliant MIDI over USB), so it seems there's some kind of bug in the midi driver.
This is an example captured with aseqdump and just tapping one key:

Source  Event                  Ch  Data
  0:1   Port subscribed            129:0 -> 130:0
 20:0   Pitch bend              3, value 0
 20:0   Note on                 3, note 57, velocity 57
 20:0   Note on                 3, note 104, velocity 63
 20:0   Control change          3, controller 74, value 86
 20:0   Control change          3, controller 74, value 99
 20:0   Pitch bend              3, value 0
 20:0   Control change          3, controller 74, value 108
 20:0   Pitch bend              3, value 48
 20:0   Control change          3, controller 74, value 113
 20:0   Polyphonic aftertouch   3, note 57, value 46
 20:0   Pitch bend              3, value 120
 20:0   Control change          3, controller 74, value 114
 20:0   Polyphonic aftertouch   3, note 57, value 30
 20:0   Note off                3, note 57, velocity 64
 20:0   Polyphonic aftertouch   3, note 57, value 0

You can see 2 notes being sent.

I'd really like to solve this and not have to use Windows just to play the instrument but I don't know where to start.
If you could point me out to the resources I need to be able to debug this it would be much appreciated.