8 Jun
2010
8 Jun
'10
11:55 a.m.
On 08.06.2010 11:12, david wrote:
Nicolas BERCHER wrote:
# lsusb
Bus 002 Device 005: ID 0763:0192 Midiman M-Audio Keystation 88es
Bus 002 Device 002: ID 413c:2003 Dell Computer Corp. Keyboard
Bus 002 Device 003: ID 0461:4d15 Primax Electronics, Ltd Dell Optical Mouse
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 004: ID 0bda:0103 Realtek Semiconductor Corp. USB 2.0
Card Reader
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
I guess you're right: I have 2 USB buses (one onboard (2nd) and one in
front (1st), inside a memory cards reader) and the midi keyboard shares
the 2nd bus with mouse and azerty keyboard...
I noticed there's no way to plug an usb device on the 1st bus: it only
cares about memory cards.
So I unplugged both mouse & azerty keyboard but it doesn't change anything.
Do you think this problem could come from an hardware failure into my SB
Live sound card?
Nicolas.
On 06.06.2010 23:44, Ken Restivo wrote:
Hmm, have never had QSynth repeat a note unless I actually repeated a
note. Interesting. I don't know the innards of MIDI events, so don't
know what the various numbers above mean.
WAGging around: Is your USB MIDI connection sharing a USB bus with
other USB devices? Maybe some other USB device is doing something
weird with the bus and something isn't getting handled right?
On Sun, Jun 06, 2010 at 10:15:03AM -0400, Dave
Phillips wrote:
Thank you for answers.
Yes, I also prefer command line tools! ;-)
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.
The keyboard seems to do things right, so I think it comes from qsynth.
Isn't that strange? I mean many people around there use qsynth, am I
the only one to have this kind of problem? 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/
For none of the above (my preference): aseqdump :-)
-ken