vkeybd - virtual keyboard on X
vkeybd is a virtual keyboard for AWE/OSS, MIDI/OSS and ALSA drivers.
It's a simple fake of a MIDI keyboard on X-windows system. Enjoy a
music with your mouse and computer keyboard :-)
Use the specified mode for output device. The argument are awe,
midi or alsa, for AWE/OSS, MIDI/OSS and ALSA devices, respec-
tively. Default is alsa.
Use the specified file as config file (see section "KEYBOARD").
Use the specified file as preset list file (see section "PRESET
Specify the channel to be played for normal instruments. Valid
only for MIDI and ALSA devices. Default is 0.
Specify the channel to be played for drum instruments. Valid
only for MIDI and ALSA devices. Default is 9.
Specify the number of octaves to display keys. Default is 3.
ALSA Device Option
Set ALSA client and port numbers to be connected. If argument
begins with 's' or 'S', the port is opened as subscription port,
and events are sent to all connected subscribers. The port can
be connected to other ports via aconnect(1). Otherwise, vkeybd
connects directly to the specified port. The argument must be a
form like client:port or client.port, where client and port are
index numbers listed in /proc/asound/seq/clients. Default is
Specify the name of client/port. Some applications like tk707
check the client/port name whether it is a valid MIDI device
port. This options makes vkeybd possible to "fake" as a real
Specify the synth device index for AWE32/64 WaveTable. If nega-
tive value is given, the device is auto-probed. Default value
MIDI Device Option
Speicfy the file path of MIDI device. Default value is
Connection shows whether the vkeybd connects to the device. On OSS
system, only one application is allowed to access sequencer device.
Thus, if one wants to play another program even using another device,
he needs to disconnect vkeybd once. On ALSA or OSS emulation on ALSA,
you don't have to switch vkeybd off, since multiple access is allowed.
With Save Config , the current keymap and view configuration are saved
on ~/.vkeybdrc config file. This file will be read at the next invoke.
Thie menu shows the check buttons to toggle the display of control but-
With Key/Velocity button, a key and a velocity scale bars are shown.
The key scale indicates the lowest note value of the visible keyboard
(as default 48 = C4). The velocity scale bar is used to change the
velocity of each note-on.
With Control button, controls for the current channel and for the MIDI
continous-controls are enabled. The channel number is increased or
decreased by clicking the right or left button around the shown channel
number. The bank and preset are remembered for each channel. You may
choose the CC to be adjusted by pull-down menu, which indicates Mod-
Wheel as default. Then change the parameter value with the scale bar
at the right side.
With Pitch button, you may adjust pitch wheel. The pitch goes back to
the center position when you click the Pitch Clear button at the left.
With Program button, the selection list of playing instrument is tog-
gled. The shown presets are read from preset list file.
Each visible key is mapped on your computer keyboard from 'z' to '\'.
To use the computer keyboard, you should turn off auto repeat on your X
display via xset(1) :
% xset -r
The key assignment can be changed by editting the config file ~/.vkeyb-
drc. Once save the current configuration via File/Save Config menu.
The config file is the Tcl source, and you may change the list of
PRESET LIST FILE
The preset list file is used to describe the list of MIDI preset names.
If the command line option is omitted, the default preset list file
~/vkeybd.list, ~/.vkeybd.list and $vkblib/vkeybd.list are searched
sequentially. The preset list will appear when Program toggle button
is on, and you can select a tone to be played from the list.
The preset list file can be converted from SoundFont(tm) file via
sftovkb(1) utility. For example,
% sftovkb synthgm.sbk > vkeybd.list
sftovkb(1), X(1), xset(1), aconnect(1)
Takashi Iwai <email@example.com>
January 1, 2000 vkeybd(1)