[LAU] Sustain pedal issue with undesired repeated notes (m-audio keystation 88es + qjackctl + qsynth)

[Dave Phillips]

Nicolas BERCHER wrote:
>
> I have a problem I can't face alone on the digital piano I made on 
> Debian Lenny with qsynth (v0.2.5-2.2), qjackctl (v0.3.2-1) and an 
> m-audio keystation 88es keyboard.
>
> When I play the piano, some notes will repeat themselves after a few 
> seconds only if I keep the sustain pedal pressed, just like a delay 
> effect would do.
> I reported that only 4 notes are concerned for the moment, they have 
> different repeat delays:
>  G  : ~7.5 sec (G4)
>  G# : ~7 sec (G#4)
>  A  : ~6.5 sec (A4)
>  A# : ~6 sec   (A#4)
> Note that the notes above, relatively to the middle C of a piano 
> keyboard called C3, goes from G4 to A#4.
>
> Could this be due to an hardware issue in the m-audio keyboard?
>
> Thanks a lot for any idea on how to track down and correct this (if 
> possible).


Try putting a MIDI monitor program between the keyboard's MIDI output 
and QSynth's input port in QJackCtl. Look for the repeats there.

If you have KDE: http://kmidimon.sourceforge.net/

For Gnome/GTK: http://home.gna.org/gmidimonitor/

Best,

dp