Korg MICRO manual Type, DB LPF Figure, CUTOFF0...127, Resonance, Filter EG INT

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6.FILTER — SYNTH

The filter controls the tonal character of the sound produced by the oscillator. It determines the tone by allowing only the desired portion of the sound to pass. "TYPE" (knob 1) selects the type of filter (i.e., the way in which it will cut the frequency). "CUTOFF" (knob 2) sets the frequency at which the cut will occur. Normally, turning this knob toward the right will brighten the sound, and turning it toward the left will darken the sound. "RESONANCE" (knob 3) emphasizes the frequency region near the cutoff frequency, adding a distinctive character to the sound. Other parameters in this section let you specify the depth of the modulation applied by the filter EG, and the way in which keyboard tracking will affect the cutoff frequency.

TYPE

[-24dB LPF, -12dB LPF,

 

-12dB BPF, -12dB HPF]

Selects the type of filter

-24dB LPF ():

The -24 dB LPF (-24 dB/octave Low Pass Filter) is the most common type of filter; it passes the frequen- cies that are below the cutoff fre- quency, and cuts the frequencies that are above (Figure 6-1). Low- ering the cutoff frequency will make the tone darker and more mellow.

-12dB LPF ():

The -12 dB LPF (-12 dB/octave Low Pass Filter) has a more gentle slope than the -24 dB LPF, producing a more natural-sounding effect.

("-24 dB LPF")(Figure 6-1)

Figure 6-1

CUTOFF[0...127]

Sets the cutoff frequency. Increasing this value will raise the cutoff frequency.

"CUTOFF" can be varied by time-variant change produced by Filter EG, by keyboard play- ing dynamics (velocity), and by note location (keyboard track- ing).

If the "CUTOFF" value is set too low, the volume may be ex- tremely low, or you may hear no sound at all.

Figure 6-4

The effect of resonance

LPF

RESONANCE [0...127]

Sets the resonance of the filter. This will emphasize the overtones near the cutoff frequency specified by "CUTOFF," adding a distinctive character to the sound. Increasing this value will increase the effect. (Figure 6-4)

Since movement of the "CUTOFF" knob will affect the overtones that are boosted by resonance, it is best to adjust "CUTOFF" and "RESO- NANCE" in conjunction with each other.

FILTER EG INT

[-63...63]

This specifies how time-variant modulation from the Filter EG will be applied to the cutoff frequency (Figure 6-5). The cutoff frequency will change over time according to the Filter EG settings, modifying the tone. For example, you can use this to create a sound that gradu- ally begins to brighten when you press the key, and then gradually becomes darker.

This INT (Intensity) parameter specifies the depth (sensitivity) to which the Filter EG will affect the cutoff frequency.

With a setting of 0, the Filter EG will not affect the cutoff frequency. In- creasingly positive (+) settings will allow the Filter EG to have a corre- spondingly greater effect on the cutoff frequency. (Figure 6-6)

FILTER KEY TRACK

[-63...63]

This specifies how keyboard track- ing (the keyboard location that you play) will affect the cutoff fre- quency.

For example if the sound played by the C4 key has the desired tone but higher notes no longer have reso- nance or are too mellow-sounding, you can adjust keyboard tracking to make compensations so that the cutoff frequency will rise for higher notes.

With positive (+) settings, the cut- off frequency will rise as you play upward from the C4 note, and fall as you play downward. With nega- tive (-) settings, the cutoff frequency will fall as you play upward from the C4 note, and rise as you play downward.

LPF (Low Pass Filter)

HPF

-12dB/oct

-24dB/oct

BPF

Frequency

Cutoff

Low resonance value High resonance value

Increasingly negative (-) settings will allow a correspondingly greater effect in the opposite direc- tion. (Figure 6-7)

With a setting of +48, the change in cutoff frequency will be pro- portionate to the change in pitch. With a setting of 0, key- board tracking will not affect the cutoff frequency.

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Contents Page Page Iii Table of Contents Table of Contents Saving your edited settings Midi on the microKORGMain Features IntroductionFront and rear panel Front panelTimbre SELECT/FORMANT Hold key Edit Controls 1, 2, 3, 4, 5 knobsEdit Select 1 dial Edit Select 2 dial Rear panel Connections from the audio outputs Connecting the included micConnections Connections to the audio inputsTurning the power on Turning the power onPower supply Turning the power offDemo songs Listening to the demo songsMicroKORG contains several demo songs Selecting and playing a program Using the Performance Edit function to modify the soundSynth programs Modifying the soundUsing the Pitch and MOD wheels for control Using the Octave Shift UP and Down keys for controlUsing the keyboard for control Knob 1 CUTOFF, Knob 2 Resonance Vocoder programsPlaying a vocoder program Knob 3 EG ATTACK, Knob 4 EG ReleaseArpeggiator Using the arpeggiatorUsing the step arpeggiator to vary the arpeggio Modifying the arpeggioBasic editing procedure Basic editingSelect the parameter that you want to edit If the parameter value does not change when you turn knobs How to read the pages for each section p.16To return to the original parameter values of a program Listening to only one timbre Solo Using both timbres LayerEditing each timbre Selecting the timbre to editEditing a synth program Structure of a synth programOverview Voice Assign Voice SYNTH/VOCODERSINGLE/LAYER Unison DetunePitch SYNTH/VOCODER Wave ControlTriangle Wave You can modify the waveform by adjusting this valueAdjusting this value will modify the waveform. Figure Sine WaveWave Control Processing an external input audio signal SEMITONE-24...24 Wave Saw, Square, TriangleOSC MOD TUNE-63...63Mixer Synth OSC 1 LevelOSC 2 Level Noise Level 127 CUTOFF0...127 TypeDB LPF Figure Resonance12dB HPF Filter KEY Track12dB BPF Filter oscillationDecay Sustain Release EG ResetATTACK0...127 Second note-on will start from a levelPanpot L63...Center...R63 AMP Amplifier SynthLEVEL0...127 DistortionAttack EG ResetAMP EG SYNTH/VOCODER SustainTempo Sync OFF, on Frequency LFO 1, 11. LFO 2 SYNTH/VOCODERWave LFO1 Wave LFO2Velocity keyboard playing strength Patch 1, 13. Patch 2, 14. Patch 3, 15. Patch 4 SynthMOD INT Keyboard tracking keyboard posi- tionCarrier Editing a vocoder programStructure of a vocoder program ModulatorOSC1 SYNTH/VOCODER Editing example for a vocoder programTHRESHOLD0...127 High-frequency portion of the signal will always be passedGate Sense HPF LevelMixer Vocoder Inst LevelNoise Level Filter Vocoder Formant ShiftSense FC MOD Vocoder Amp EG will be the modulation sourceINTENSITY-63...63 AMP Vocoder Direct LevelCH 3 Level CH 1 LevelCH 2 Level CH 4 LevelMicroKORGs effect structure Delay effect Delay FXEditing the effects and EQ Modulation-type effect MOD FXLFO Speed MOD FX SYNTH/VOCODERSelects the effect type Specifies the speed of the modula- tion effect LFODelay Depth Delay SYNTH/VOCODERDelay Time Tempo SyncHI EQ Gain EQ SYNTH/VOCODERLOW EQ Gain Sets the amount of boost or cut forEditing the arpeggiator Structure of arpeggiatorTEMPO20...300 Resolution 1/24...1/4ARPEG. a SYNTH/VOCODER GATE0...100KEY Sync ARPEG. B SYNTH/VOCODERLatch Last StepOverall settings Global Global structurePosition Signal will not be output Signal will be output30.0...50.0 Audio in ThruUsing the microKORG with Other Midi devices Midi Connecting Midi devices/computersMidi on the microKORG MIDI-related settings Synchronizing the arpeggiator Set the microKORGs Global Position to Pre TGMidi Midi CHLocal Pitch bend Messages transmitted and received by the microKORGMidi channels Program changeParameters transmitted and received via Nrpn Gate values Other controlsControlling CH Param System exclusive messages Realtime MessagesFront panel knob/key control change assignments Control 2 values when OSC 1 Wave = Dwgs OSC 2 Semitone valuesSaving Data Saving your edited settingsProcedure Saving a programExchanging timbres Shift functionsCopying a timbre Initializing a programInitializing CH PAN A/B Midi FilterInitializing CH Level A/B Midi FilterAssigning control changes Control ChangeAssigning control changes Data dump Transmission procedureReception procedure Midi Data DumpWrite protect setting Restoring the factory settings Write protect settingRestoring the factory settings PreloadOther Shift key functions Switch between Edit Select 1/2Enter demo mode Timbre solo functionAppendix LFO 1/2 and delay time synchronizationExample 2. Delay time Example 1. LFO1Troubleshooting Specifications and options Symbols IndexIndex Korg INC Voice Name List Parameter List Shift Function List