Free virtual piano widget software for mac

Virtual MIDI Piano Keyboard 0.2.6 is a brilliant MIDI events generator and receiver. It doesn't produce any sound by itself, but can be used to drive a MIDI synthesizer (either hardware or software, internal or external). You can use the computer's keyboard to play MIDI notes, and also the mouse. You can use the Virtual MIDI Piano Keyboard to display the played MIDI notes from another instrument or MIDI file player. To do so, connect the other MIDI port to the input port of VMPK.

Major Features:

1. VMPK uses a modern GUI framework: Qt4, that gives excellent features and performance. RtMIDI provides MIDI input/output features.
2. The alphanumeric keyboard mapping can be configured from inside the program using the GUI interface, and the settings are stored in XML files. Some maps for Spanish, German and French keyboard layouts are provided, translated from the ones provided by VKeybd.
3. VMPK can send program changes and controllers to a MIDI synth. The definitions for different standards and devices can be provided as .INS files, the same format used by QTractor and TSE3. It was developed by Cakewalk and used also in Sonar.
4. VMPK can help you to change sounds in your MIDI synthesizer, but only if you provide a definition for the synthesizer sounds first. The definitions are text files with the .INS extension, and the same format used by Qtractor (Linux), and Sonar (Windows).
5. When you start VMPK the first time, you should open the Preferences dialog and choose a definition file, and then select the instrument name among those provided by the definitions file. There should be one instrument definitions file installed in the VMPK's data directory (typically "/usr/share/vmpk" in Linux, and "C:Program FilesVMPK" in Windows) named "gmgsxg.ins", containing definitions for the General MIDI, Roland GS and Yamaha XG standards. It is a very simple format, and you can use any text editor to look, change, and create a new one. You can find a library of instruments definitions at the cakewalk ftp server.
6. Another customization that you may want to tweak is the keyboard mapping. The default layout maps about two and half octaves for the QWERTY alphanumeric keyboard, but there are some more definitions in the data directory, adapted for other international layouts. You can even define your own mapping using a dialog box available in the Edit->Keyboard map menu.
7. There are also options to load and save the maps as XML files. The last loaded map will be remembered the next time you start VMPK. In fact, all your preferences, selected MIDI bank and program, and the controller values will be saved on exit, and restored when you restart VMPK the next time.

Requirements:

• Qt 4.4 or newer
• ALSA sequencer in Linux, WinMM in Windows and CoreMIDI in Mac OSX
• ALSA sequencer in Linux, WinMM in Windows and CoreMIDI in Mac OSX
• GCC C++ compiler.