Alesis D4 manual System Common Messages, 3B Mode Messages

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124Omni Off (0)

125Omni On (0)

126Mono On (0-16; 0=Omni Off)

127Poly On (0)

6.3B Mode Messages

There are two messages that determine the MIDI mode (i.e., how the D4 will receive MIDI data). The “Omni” message determines how many channels will be recognized. Omni On means that data from all channels will be received; Omni Off limits the number of channels, usually to one.

The “Mono/Poly” message deals with voice assignment within the synthesizer. In Mono mode, only one note at a time plays in response to voice messages; in Poly mode, as many voices can play notes as are available to play notes.

The D4 implements two different MIDI modes.

Omni On/Poly (Mode 1) The D4 responds to MIDI data occuring on any channel.

Omni Off/Poly (Mode 3) The D4 is tuned to a single MIDI channel, from 1 to 16.

6.4 SYSTEM COMMON MESSAGES

Intended for all units in a system, some of these messages are:

Song Position Pointer This indicates how many “MIDI beats” (normally a 16th note) have elapsed since a piece started (up to 16,384 total beats). It is primarily used to allow different sequencers and drum machines to auto-locate to each other so that if you start one sequencer, the other device will automatically jump to the same place in the song, whereupon both continue on together.

System Exclusive This message (called sys ex for short) is considered “exclusive” because different manufacturers send and receive data over MIDI which is intended only for that manufacturer’s equipment. Example: Sending a D4 message to an Ensoniq SD-1 won’t do anything but the message will be understood by other D4s. This data often contains information about individual instrument programs.

Timing Clock A master tempo source (such as a sequencer) emits 24 timing messages (clocks) per quarter note. Each device synchronized to the sequencer advances by 1/24th of a quarter note when it receives the clock message, thus keeping units in sync after they’ve both started at the same time. Many devices subdivide this clock signal internally for higher resolution (e.g., 96 pulses per quarter note).

Start Signals all rhythmically-based units when to start playing.

Stop Signals all rhythmically-based units when to stop playing.

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Contents Alesis Drum SET Management Midi Functions Introduction Principal FeaturesHOOKUP/INSTANT Gratification Return Your Warranty Card NOW2B Hook Up Audio rear panel 2A Installation2C Hook Up Midi rear panel 2D Hook Up External Triggers rear panel2F Turn On Power 2E Hook Up Power rear panel2G Select Drum Sets 2H Audition Different Drum Sounds Page 3A The Voice 2I Assign Drum Sounds to Particular Midi Notes3B About the Edit Buffer 3C About Defaults3D Midi Note Range About the User Interface 4B Cursor Buttons 4A Function Buttons4C Multi-Page Functions 4D Editing Parameter Values4F The Preview Button 4E The Store and Note Chase buttonsSTORING/NAMING AN Edited Drum SET Selecting Drum SetsRecall Alesis Recalling Factory Drum SetsPage Voice Function ButtonsOutput TuneOutput Main Drum SETEXT Trig Mode MultiGroup Button Copying a Notes Parameters to Another Note Midi ButtonDrumset Root Drum SET Root Note Midi FunctionsTurn the Data wheel to select the desired Drum Set root note Midi Channel Selection Program Change EnableMidi THRU/OUT Selection Channel Omni Thru OFFProg Change on Controllers on Controller EnableMake sure the cursor is under the Controllers status Save Data VIA Midi Program Change TableProgram Table 6A Save to DataDisk 7A Load from DataDisk Receive Data from Another Midi DeviceExternal Triggering This is how it works About Trigger ParametersPage Example TRIG01 VCURVE4 Trigger SelectionTrigger Velocity Selection Trigger Note SelectionTRIG02 VCURVE4 Method One Page Trigger Crosstalk Selection Trigger Parameter SelectionTRIG02 XTALK30 DCAY10 NOISE00 TRIG03 XTALK30 DCAY10 NOISE00Page Trigger Noise Level Selection Trigger Dcay Control SelectionTRIG01 GAIN50 Trigger Gain SelectionFootswitch Mode HI HAT Pedal Footswitch Mode8A Understanding Hi Hat Pedal Mode Page Midi Hardware Midi BasicsChannel Messages Midi Message Basics3A Voice Messages Page System Common Messages 3B Mode MessagesVideos on Midi Books on Midi
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