Re: Sustain pedal issue with undesired repeated notes (m-audio keystation 88es + qjackctl + qsynth)

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On 08.06.2010 12:21, David Santamauro wrote:
On Tue, 08 Jun 2010 12:15:13 +0200
Nicolas BERCHER<nbercher@xxxxxxxx>  wrote:

On 08.06.2010 11:21, David Santamauro wrote:
Hi,

On Tue, 08 Jun 2010 10:57:13 +0200
Nicolas BERCHER<nbercher@xxxxxxxx>   wrote:


So, I checked what's going on:
$ aseqdump --list
    Port    Client name                      Port name
     0:0    System                           Timer
     0:1    System                           Announce
    14:0    Midi Through                     Midi Through Port-0
    20:0    SB Live! Value [CT4870]          EMU10K1 MPU-401 (UART)
    24:0    USB Keystation 88es              USB Keystation 88es
MIDI 1 $ aseqdump -p 24:0
Waiting for data. Press Ctrl+C to end.
Source_ Event_________________ Ch _Data__
    24:0   Control change          0  64 127
    24:0   Note on                 0  82  82
    24:0   Note on                 0  82   0
    24:0   Control change          0  64   0

The above sequence dumped by aseqdump shows only one note event
(lines 2+3: press+release) but I heard a delayed note as mentioned
in my first mail.

Actually, there are two note events and both are NOTE ON, one with
velocity of 82 and the other 0. The velocity 0 should be
interpreted as NOTE OFF.

I forgot to tell you that the third dump line, which correspond to
the key release, appeared *after* the undesired delayed note (I've
kept it pressed about ten seconds).
So I think that the keyboard events are well interpreted by qsynth
since I can play piano in a standard way: notes can ring as long as I
want when I press/release the keys!
Aha ... sounds like an attack issue with the soundfont. You press a
key, there is an initial attack, the sample loops and reattacks.

   - do the notes repeat if you play them staccato, i.e., key
     on/off<  the time seen for the repeated notes to trigger?
No, that's why, fortunately, I can play of the songs I want on this fake digital piano without any delay trouble (occurs on 4 specific notes only if pedal/key pressed longer than 6~7 seconds)!

   - Have you tried a different soundfont and/or patch and is the
     behavior identical regardless?
The use of another piano sound font solved the problem.
It is sad for, as a beginner in midi and jack world, to began by using a corrupted sound font...! I have to do some tests in order to be sure that the problem was caused by a particular corrupted sound font before I mark this thread SOLVED!

I really thank all of you, you were all of great help!
Nicolas
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