Casio CTK700 User Guide - Page 32

MIDI What is MIDI? The letters MIDI stand for Musical Instrument Digital Interface, which is the name of a worldwide standard for digital signals and connectors that makes it possible to exchange musical data between musical instruments and computers (machines) produced by different manufacturers. MIDI Connections MIDI IN MIDI OUT MIDI IN MIDI OUT Computer or other MIDI device General MIDI General MIDI standardizes MIDI data for all sound source types, regardless of manufacturer. General MIDI specifies such factors as tone numbering, drum sounds, and available MIDI channels for all sound sources. This standard makes it possible for all MIDI equipment to reproduce the same nuances when playing General MIDI data, regardless of the manufacturer of the sound source. Though the sound source of this keyboard is not General MIDI compatible, you can still connect the keyboard to a computer or other MIDI equipment to playback General MIDI data that is widely available in stores, over computer networks, and from other sources. NOTE • General MIDI data made up of a large number of parts may not play correctly on this keyboard. • You will have most success playing back General MIDI data that has few parts and is made up of data on channels 1, 2, 3, 4, and 10. Messages There is a wide variety of messages defined under the MIDI standard, and this section details the particular messages that can be sent and received by this keyboard. NOTE ON/OFF This message sends data when a key is pressed (NOTE ON) or released (NOTE OFF). A NOTE ON/OFF message include a note number (to indicate note whose key is being pressed or released) and velocity (keyboard pressure as a value from 1 to 127). NOTE ON velocity is always used to determine the relative volume of the note. This keyboard does not receive NOTE OFF velocity data. Whenever you press or release a key on this keyboard, the corresponding NOTE ON or NOTE OFF message is sent by constant velocity from the MIDI OUT terminal. NOTE • The pitch of a note depends on the tone that is being used, as shown in the Note Table on page A-2. Whenever this keyboard receives a note number that is outside its range for that tone, the same tone in the nearest available octave is substituted. PROGRAM CHANGE This is the tone selection message. PROGRAM CHANGE can contain tone data within the range of 0 to 127. A PROGRAM CHANGE message (0 to 99) is sent out through this keyboard's MIDI OUT terminal whenever you manually change its tone number. Receipt of a PROGRAM CHANGE message from an external machine changes the tone setting of this keyboard (this page). This keyboard can send tone data within the range of 00 to 99 and receive tone data within the range of 0 to 127. PITCH BEND This message carries pitch bend information for smoothly sliding the pitch upwards or downwards during keyboard play. This keyboard does not send pitch bend data, but is can receive such data. CONTROL CHANGE This message adds effects such as vibrato and volume changes applied during keyboard play. CONTROL CHANGE data includes a control number (to identify the effect type) and a control value (to specify the on/off status and depth of the effect). The following is a list of data that can be received using CONTROL CHANGE. Effect VOLUME HOLD1 * MODULATION Control Number 7 64 1 * Pressing the foot pedal causes the sustain effect (HOLD1) to be sent (control number 64). E-30 627A-E-032A