Yamaha RS7000 Owner's Manual - Page 264
MIDI Basics, MIDI Channels, Multi-timbre and Single-timbre, Tone Generators
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1. MIDI Basics 1. MIDI Basics 1. MIDI is ... "MIDI" is an acronym for "Musical Instrument Digital Interface", and is a worldwide standard designed to allow performance, voice, and other data to be transferred between musical instruments. Data communication is assured even between musical instruments and equipment from different manufacturers. MIDI has three main functions: The first is remote control of musical instruments. For example, performance or voices switching operations, etc., carried out on one instruments can remotely control another instrument connected via MIDI. Second is automated performance. Performance data recorded by a sequencer or computer can be transmitted via MIDI to multiple instruments for fully automatic playback. The third is synchronization between instruments. Instruments that use tempo data for playback or recording can be connected via MIDI and accurately synchronized to the same tempo. 2. MIDI Channels MIDI data is transferred over 16 channels numbered from 1 through 16. It is thus possible to transfer the MIDI performance data for up to 16 different "parts" via a single cable. MIDI channels can be thought of as being like television channels. Each TV station broadcasts on a separate channel. At the receiving end (i.e. the TV set) the television receiver can be set to receive only one of the many channels that are on the air at the same time. Broadcast Channel 1 The receiver selects channel 1, 2, or 3 Broadcast Channel 2 Broadcast Channel 3 In a similar way, multiple transmitting devices in a MIDI system can be set to transmit on separate channels which reach the receiving device(s) via a MIDI cable. Only a MIDI device set to receive on the same channel as a transmitting device will be controlled by that device. MIDI Instrument (transmitting device) (Performance data) ch.1 .. Piano ch.2 .. Guitar ch.3 .. Bass MIDI transmit channel settings MIDI Instrument (receiving device) (Performance data) ch.1 .. Piano ch.2 .. Guitar ch.3 .. Bass MIDI receive channel settings 3. Multi-timbre and Single-timbre Tone Generators MIDI tone generators can be grouped into two main types according to the number of channels that can simultaneously receive on - Multi-timbre and Single-timbre. Single-timbre tone generators can receive and play the MIDI performance for one part via a single MIDI channel. This type of tone generator is most commonly used as an expansion tone module for keyboards or other MIDI controllers. Multi-timbre tone generators are capable of simultaneously receiving and playing the MIDI performance data for several parts over multiple MIDI channels. This type of tone generator can be thought of as several single-timbre tone generators in one integrated unit. In this sense, the number of simultaneous parts that can be played by a multi-timbre tone generator is determined by the number of single-timbre tone generators it contains. The RS7000 tone generator is a multi-timbre type which is always capable of simultaneously playing up to 16 different parts. Synthesizer (Performance data) ch.1 .. piano Single-timbre Tone Generator Channel 1 Sequencer (Performance data) ch.1 .... Piano ch.2 .... Guitar ch.16 .. Drums Multi-timbre Tone Generator Channel 1 Channel 2 Channel 16 264 RS7000