xmidi - MIDI FILE Player

Introduction

xmidi is a graphical interface which allows you to play MIDI files on the FM synthesizer in the enhanced 4-operator mode.

Control Buttons

• Quit - This button quits the application.
• File - This button pops up a file selection menu window. You must select a MIDI file and press the OK button. Once the MIDI file is read in, the channel buttons will have an instrument number
• Load - Pressing this button enables you to change the internal instrument map of the FM synthesizer. The Load button reads a file called sbi.def in the current directory.
• Show - This will pop up a selection window. which shows the list of all intruments available in the FM synthesizer. This panel can be used to change the intrument on a particular channel. To do this, you must open a MIDI file and then toggle “ON” a channel button. You may then high-light any instrument in the list and click on it. Notice that the number on the channel button now reflects the number of the instrument you have just selected.
• Speed - This slider changes the tempo of the MIDI file during playback.
• Volume - This slider changes the volume of the MIDI file during playback.
• Channel Buttons - There are 16 channels in MIDI. Channel 10 is reserved for percussion intruements. When a MIDI file is loaded, the channel button has a number which is the number of the instrument in the General MIDI patch map.
• Record - Pressing this button permit an external MIDI keyboard to play notes on the FM synthesizer. The channels must be programmed with an instrument in order to hear any music.
• Rewind - Pressing this button will rewind the MIDI file to the beginning. You will hear the MIDI notes being played backwards.
• Play - Pressing this button will play the MIDI file. Playback depends on the current Speed and Volume.
• Fast -Forward - Pressing this button will advance the MIDI file. Notes willl be played back in rapid succession.
• Stop - Pressing this button will stop the current action - record, rewind, play or fast-forward.