Korg MICRO manual Filter Vocoder, Formant Shift, Sense

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6.FILTER — VOCODER

By using "FORMANT SHIFT" (knob 1) and "CUTOFF" (knob 2) to shift the cutoff frequency of each band pass filter of the carrier (the "synthesis filter"), you can raise or lower the frequency response while maintaining the character of the modulator, thus varying the character of the vocoder output. Both of these knobs do the same thing, and have the same range. FORMANT SHIFT is indexed to shift from filter to filter, and CUTOFF is continously variable. In addition, you can use "E.F. SENSE" (knob 4) to adjust the sensitivity of the Envelope Follower for the modulator, in order to vary the smoothness of the attack and the length of the release for the vocoder output.

FORMANT SHIFT

[0, 1, 2, -1, -2]

Shifts the cutoff frequency of each band-pass filter of the carrier, in units of filters.

CUTOFF[-63...63]

This continuously shifts the cutoff frequency of each band-pass filter of the carrier.

RESONANCE[0...127]

Specifies the amount of resonance for each band-pass filter of the car- rier.

Increasing this value will empha- size the regions near each cutoff fre- quency.

E.F.SENSE

[0...126, Hold]

Specifies the sensitivity of the En- velope Follower for the modulator. Lower settings of this value will al- low the attacks of the input signal to be detected more rapidly.

If you set this to Hold (), the character of the signal that is being

Table 6-1

Frequency

 

 

Band (CH)

 

 

[Hz]

Formant shift 0

Formant shift +2

Formant shift -2

39

 

 

 

 

 

 

50

 

 

 

 

 

 

65

 

 

 

 

1

(CH1)

80

 

 

 

 

2

125

1

(CH1)

 

 

3

(CH2)

185

2

 

 

4

270

3

(CH2)

1

(CH1)

5

(CH3)

350

4

2

6

430

5

 

3

 

7

 

"FORMANT SHIFT" and "CUTOFF"

Each parameter allows you to vary the character over a range of two steps upward or downward (a total of four steps upward or downward when used together). If both of these parameters are at 0, the character will match the cutoff frequencies of the modulator band pass filters (the analysis filter).

BPF

BPF

BPF

7

8

9

Frequency

-63 0 +63

Cutoff (range in which BPF 8 will change)

Formant Shift:+2

 

BPF

BPF

BPF

7

8

9

 

Frequency

 

 

 

 

 

-63

 

0

 

+63

 

 

 

 

 

 

 

 

Cutoff (range in which BPF 8 will change)

input at that moment will be held. Subsequently, the sound will retain that character regardless of whether there is any input.

The signal information that is maintained in the Hold state can be saved in the program by writ- ing the program.

If you set this to Hold when there is no input signal present, there will be no output even if an audio signal is subsequently input.

This value will automatically be set to Hold if you press the FORMANT HOLD key. Hihger values will retain more of the sound’s natural decay.

 

 

(CH3)

 

(CH2)

 

(CH4)

530

6

4

8

630

7

(CH4)

5

(CH3)

9

(CH5)

780

8

6

10

950

9

(CH5)

7

(CH4)

11

(CH6)

1150

10

8

12

1380

11

(CH6)

9

(CH5)

13

(CH7)

1680

12

10

14

2070

13

(CH7)

11

(CH6)

15

(CH8)

2780

14

12

16

3800

15

(CH8)

13

(CH7)

 

 

5000

16

14

 

 

6400

 

 

15

(CH8)

 

 

8100

 

 

16

 

 

10510

 

 

 

 

 

 

12600

 

 

 

 

 

 

Although the microKORG's editable band-pass filter has eight channels, it internally contains sixteen band- pass filters. These sixteen filters are arranged in pairs (a pair for each channel). Table 6-1 shows how the frequencies adjusted by "FORMANT SHIFT" and "CUTOFF" correspond to the frequencies of the sixteen filters.

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Contents Page Page Iii Table of Contents Table of Contents Midi on the microKORG Saving your edited settingsIntroduction Main FeaturesFront panel Front and rear panelEdit Select 1 dial Edit Select 2 dial Timbre SELECT/FORMANT Hold keyEdit Controls 1, 2, 3, 4, 5 knobs Rear panel Connections Connecting the included micConnections from the audio outputs Connections to the audio inputsPower supply Turning the power onTurning the power on Turning the power offMicroKORG contains several demo songs Demo songsListening to the demo songs Synth programs Using the Performance Edit function to modify the soundSelecting and playing a program Modifying the soundUsing the keyboard for control Using the Pitch and MOD wheels for controlUsing the Octave Shift UP and Down keys for control Playing a vocoder program Vocoder programsKnob 1 CUTOFF, Knob 2 Resonance Knob 3 EG ATTACK, Knob 4 EG ReleaseUsing the step arpeggiator to vary the arpeggio Using the arpeggiatorArpeggiator Modifying the arpeggioSelect the parameter that you want to edit Basic editing procedureBasic editing To return to the original parameter values of a program If the parameter value does not change when you turn knobsHow to read the pages for each section p.16 Editing each timbre Using both timbres LayerListening to only one timbre Solo Selecting the timbre to editOverview Editing a synth programStructure of a synth program SINGLE/LAYER Voice SYNTH/VOCODERVoice Assign Unison DetunePitch SYNTH/VOCODER Control WaveAdjusting this value will modify the waveform. Figure You can modify the waveform by adjusting this valueTriangle Wave Sine WaveWave Control Processing an external input audio signal OSC MOD Wave Saw, Square, TriangleSEMITONE-24...24 TUNE-63...63OSC 2 Level Noise Level 127 Mixer SynthOSC 1 Level DB LPF Figure TypeCUTOFF0...127 Resonance12dB BPF Filter KEY Track12dB HPF Filter oscillationATTACK0...127 Sustain Release EG ResetDecay Second note-on will start from a levelLEVEL0...127 AMP Amplifier SynthPanpot L63...Center...R63 DistortionAMP EG SYNTH/VOCODER EG ResetAttack SustainWave LFO1 LFO 1, 11. LFO 2 SYNTH/VOCODERTempo Sync OFF, on Frequency Wave LFO2MOD INT Patch 1, 13. Patch 2, 14. Patch 3, 15. Patch 4 SynthVelocity keyboard playing strength Keyboard tracking keyboard posi- tionStructure of a vocoder program Editing a vocoder programCarrier ModulatorEditing example for a vocoder program OSC1 SYNTH/VOCODERGate Sense High-frequency portion of the signal will always be passedTHRESHOLD0...127 HPF LevelNoise Level Mixer VocoderInst Level Sense Filter VocoderFormant Shift INTENSITY-63...63 FC MOD VocoderAmp EG will be the modulation source Direct Level AMP VocoderCH 2 Level CH 1 LevelCH 3 Level CH 4 LevelEditing the effects and EQ Delay effect Delay FXMicroKORGs effect structure Modulation-type effect MOD FXSelects the effect type MOD FX SYNTH/VOCODERLFO Speed Specifies the speed of the modula- tion effect LFODelay Time Delay SYNTH/VOCODERDelay Depth Tempo SyncLOW EQ Gain EQ SYNTH/VOCODERHI EQ Gain Sets the amount of boost or cut forStructure of arpeggiator Editing the arpeggiatorARPEG. a SYNTH/VOCODER Resolution 1/24...1/4TEMPO20...300 GATE0...100Latch ARPEG. B SYNTH/VOCODERKEY Sync Last StepGlobal structure Overall settings Global30.0...50.0 Signal will not be output Signal will be outputPosition Audio in ThruMidi on the microKORG Using the microKORG with Other Midi devices MidiConnecting Midi devices/computers MIDI-related settings Set the microKORGs Global Position to Pre TG Synchronizing the arpeggiatorLocal MidiMidi CH Midi channels Messages transmitted and received by the microKORGPitch bend Program changeParameters transmitted and received via Nrpn Controlling CH Param Gate valuesOther controls Realtime Messages System exclusive messagesFront panel knob/key control change assignments OSC 2 Semitone values Control 2 values when OSC 1 Wave = DwgsProcedure Saving your edited settingsSaving Data Saving a programCopying a timbre Shift functionsExchanging timbres Initializing a programInitializing CH Level A/B Midi FilterInitializing CH PAN A/B Midi FilterAssigning control changes Assigning control changesControl Change Reception procedure Transmission procedureData dump Midi Data DumpRestoring the factory settings Restoring the factory settings Write protect settingWrite protect setting PreloadEnter demo mode Switch between Edit Select 1/2Other Shift key functions Timbre solo functionExample 2. Delay time LFO 1/2 and delay time synchronizationAppendix Example 1. LFO1Troubleshooting Specifications and options Index SymbolsIndex Korg INC Voice Name List Parameter List Shift Function List