8 Jun
2010
8 Jun
'10
12:13 p.m.
On Tue, 08 Jun 2010 11:55:01 +0200, Nicolas BERCHER wrote
On 08.06.2010 11:12, david wrote:
> 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?
No, please. This is highly unlikely. Iff something on the bus would
spoof the device ID of the Midi interface things would go crazzy long
before a note on event would be recognized ...
# 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...
Yes, but that's absolutely normal. USB is a _bus_ after all (i.e. many
devices can talk over it).
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.
As to be expected :-)
Do you think this problem could come from an hardware
failure into
my SB Live sound card?
How should that happen? If no midi note event shows up in the dump
the problem must be in qsynth (or the sound font it uses). What sound
found do you use, BTW?
Cheers, Ralf Mattes
Nicolas.
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--
R. Mattes -- Systemeinheitsstreichler
Hochschule fuer Musik Freiburg
rm(a)inm.mh-freiburg.de