On 06.06.2010 15:07, Nicolas BERCHER wrote:
  Hi,
 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? 
Edit: the problem
described above also appears when I don't use the
sustain pedal, but let the key pressed to let the note ring.
N.