Boss Audio Systems GT-6B Appendices, About Midi, How Midi messages are transmitted and received

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Appendices

About MIDI

MIDI is an acronym for Musical Instrument Digital Interface, and is a world-wide standard for allowing electronic musical equipment to communicate by transmitting messages such as performance information and sound selections. Any MIDI equipped device is able to transmit applicable types of data to another MIDI equipped device, even if the two devices are different models or were made by different manufacturers. In MIDI, performance information such as playing a key or

fig.11-102

Broadcasting

Station A

Broadcasting

Station B

Broadcasting

Station C

T.V. information from many different broadcasting station is sent through an antena.

Select the channel of the broadcasting station you wish to watch

pressing a pedal are transmitted as MIDI Messages.

How MIDI messages are transmitted and received

First, we will explain briefly how MIDI messages are transmitted and received.

MIDI connectors

The following types of connector are used to convey MIDI messages. MIDI cables are connected to these connectors as needed.

fig.11-101

MIDI IN: This connector receives messages from another MIDI device.

MIDI OUT: This connector transmits messages from this device.

MIDI THRU: This connector re-transmits the messages that were received at MIDI IN.

*The GT-6B features both “MIDI IN” and “MIDI OUT” connectors.

MIDI channels

MIDI is able to independently control more than one MIDI device over a single MIDI cable. This is possible because of the concept of MIDI channels.

The idea of MIDI channels is somewhat similar to the idea of television channels. By changing channels on a television set, you can view a variety of programs. This is because the information of a particular channel is received when the channels of the transmitter and receiver match.

MIDI has sixteen channels 1 – 16, and MIDI messages will be received by the instrument (the receiving device) whose channel matches the channel of the transmitter.

*If omni mode is on, data of all MIDI channels will be received regardless of the MIDI channel setting. If you do not need to control a specific MIDI channel, you may set Omni On.

Main types of MIDI message used by the GT-6B

MIDI includes many types of MIDI messages that can convey a variety of information. MIDI messages can be broadly divided into two types; messages that are handled separately by MIDI channel (channel messages), and messages that are handled without reference to a MIDI channel (system messages).

Channel messages

These messages are used to convey performance information. Normally these messages perform most of the control. The way in which a receiving device will react to each type of MIDI message will be determined by the settings of the receiving device.

Program change messages

These messages are generally used to select sounds, and include a program change number from 1 to 128 which specifies the desired sound.

Control change messages

These messages are used to enhance the expressiveness of a performance. Each message includes a controller number, and the settings of the receiving device will determine what aspect of the sound will be affected by control change messages of a given controller number.

The specified parameters can be controlled with the GT-6B.

Appendices

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Contents Copyright 2002 Boss Corporation Printing Conventions in This ManualPage Page Memory Backup Power SupplyPlacement MaintenanceContents Contents Main Features COMP/LIMITER p Compressor/Limiter Panel DescriptionsFront Panel Chorus p REV/DLY p Reverb/DelayPanel Descriptions OVERDRIVE/DISTORTION pFX-2 p Panel Descriptions WAH pFX-1 p Rear Panel Making Connections Playing SoundsNext, turn on the power to the bass amp power amp Turning On the PowerAdjusting the Output Level Switch on the Power switch on the GT-6B’s rear panelSelecting Patches What is a Patch?How to Switch Patches Turning Each of the Effects in a Patch On and Off Turning Off the PowerIf the Patch Does Not Switch Switching Patches by Specifying the Bank and NumberLimiter THR Limiter threshold Adjusting the Tones with the KnobsGetting the Tones You Want- Fast EZ Tone Comp ATK Compressor attackCreating You Own Favorite Tones Patches Repeat Steps 1 To select another effect to be switched on and offSwitch on and off Adding and Omitting EffectsRotate the Value dial to change the settings value Parameter whose settings are to be changedQuick Setting Rotate the Value dial to select the effect setting youPress FX-2 Turn on the FX-2 effect Adding Effects p Using the Pedal Effects Wah, Pedal Bend, Ring ModulatorPedal Bend Press NAME/NS/MASTER until Name appears in the display Naming TonesRing Modulator Press FX-1 Turn on the FX-1 effect Adding Effects pAppears in the display Changing the Order of the Effects Effect ChainCopying Patches Saving the Tones You Have CreatedWrite Saving the Tones You Have Created Exchanging PatchesCompressor/Limiter Effects ExplainedFUZ Fuzz OD/DIST Overdrive/DistortionOD Overdrive DST DistortionREV/DLY Reverb/Delay/ SOS Sound On Sound REV Reverb DLY DelayPreamp Reverb & DelaySOS Sound On Sound Speaker FX Select Effect Select WH Pedal WahEffects Explained Direct Level Freq FrequencyAW Auto Wah TW Touch WahEffects Explained Rate FX-1OCT Octave ENH EnhancerMix Level SG Slow GearDEF Defretter Effects Explained SensFX-2 PH PhaserHRM Harmonist FL FlangerPitch Shifter 2CE 2x2 Chorus PB Pedal BendASL Auto Slap Sound SDD Short DelayLength Vowel VIB VibratoHMN Humanizer TriggerSYN Bass Synth Noise Level Octave ShiftPWM Rate Pulse Width Modulation Rate PWM Depth Pulse Width Modulation DepthNS Noise Suppressor FV Foot VolumeQuick Settings p Manual Settings pSetting the Range of the Volume Change Settings for Using Expression PedalPedal Settings for the CTL Pedal Making Settings Instantly Quick SettingsSetting the Pedal Functions Pedal Assign Pedal Settings for the Expression Pedal SwitchTarget Variation Range Editing Quick SettingsSource Mode TargetPress Pedal Assign Making the Assign On/Off SettingTarget Making the Parameter SettingsWhen using the foot switch When using the expression pedalSource Source ModeFor Pitch Shifter Setting the Pedal Functions Pedal Assign Active RangeFor Foot Volume Example Act. Range Lo 40, Act. Range HiMaking Custom Overdrive/Distortion Settings Using the Customize FunctionUsing the Customize Function Making Custom Pedal Wah SettingsNumber 4 pedal Stop, Erase Using Sound On SoundProcedure Switching the XLR Output Connector Signals Convenient Features of the GT-6BUsing the Expression Pedal Even When Bypass Is in Effect Switching Bypass On and OffConvenient Features of the GT-6B Quick Patch Volume Adjustment Effect Level KnobTuning the Bass About the Display During TuningStandard Pitch 435-445 Hz How to TuneChanging the Tuner Settings Revrb Level Reverb Level 0%-200% Using the Digital OutAdjusting the Output Level from Digital OUT NS Thrshold Noise Suppressor Threshold -20 dB-+20 dBPress Utility a number of times until Meter is displayed Checking the Effect Output Level with the Level MeterOther Functions Adjusting the Display Contrast LCD ContrastLimiting the Banks That Can Be Switched Bank Extent Switching Only the NumberImmediate Other Functions Switching the Bank and NumberPress the Bank or Bank pedal to select the desired bank Press a number pedal to select the patch you want to usePatch No.& Value Setting Expression Pedal HoldSelecting the PATCH/VALUE Dial Function Dial Function Other FunctionsSetting the Knob Functions Knob Mode Controlling the GT-6B Remotely From an External Midi Device Using MidiWhat Can You Do with MIDI? Operating From the GT-6BUsing Midi Making the Settings for Midi FunctionsMidi CTL OUT Midi Control Pedal Out Off, 1-31 Midi Expression Pedal Switch Out Off, 1-31Midi PC OUT Midi Program Change Out Off, On Midi EXP OUT Midi Expression Pedal Out Off, 1-31Transmitting Transmitting and Receiving Midi DataTransmitting Data to an External Midi Device Bulk Dump Making the ConnectionsPress Exit to quit Bulk Load When Receiving Data Saved on a Midi SequencerReceiving Data from an External Midi Device Bulk Load ReceivingInitial Program Change Map Settings Setting the Program Change MapUsing Midi Main types of Midi message used by the GT-6B AppendicesAbout Midi How Midi messages are transmitted and receivedAbout the Midi implementation Factory SettingsSystem Restoring the Factory Settings Factory ResetAdjusting the Expression Pedal AppendicesCan’t Change Patches TroubleshootingNo sound / Volume is weak Volume level does not change with Foot VolumeReceived Error MessagesAppendices Midi messages are not transmitted Midi Implementation Chart GT-6B Bass Effects Processor Main SpecificationsNumerics IndexLPF IndexTHR Memo Memo Avis G601744601
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