Synth Edit

VOICES section

UNISON
Specifies the number of voices used when playing in unison mode. The maximum number of voices depends on the VOICES (total voice) setting. Unison simultaneously sounds the number of voices that you specify here, with the output of VCO1 and VCO2 mixed.

VOICES
Specifies the maximum number of notes that can played if VOICE ASSIGN is set to "POLY" or when UNISON is used.

PORTAMENTO
Specifies how the portamento effect is applied (the time over which the pitch change occurs). If the slider is in the “MIN” position, no portamento effect is applied. As you move the slider toward the “MAX” position, the pitch change occurs over a longer time.

MODE switch
Selects whether portamento is enabled when you use the TRANSPOSE lever. Use a fine-tipped pen or similar object to press this switch.

TRANSPOSE
Switches the range of pitches assigned to the keyboard in steps of two octaves.

UNISON DETUNE
Specifies the amount of detuning for the simultaneously-played voices if UNISON is set to a number greater than one and you are playing ARP ODYSSEi in unison mode. If UNISON is set to "1" (a single voice), this slider does nothing.

UNISON SPREAD
Spreads the output of the voices between the L and R channels if UNISON is set to a number greater than one and you are playing ARP ODYSSEi in unison mode. If the UNISON setting is an odd number, one voice is panned to the center.

PROPORTIONAL PITCH CONTROL
Vibrato is applied according to how strongly you press the pad.

VOICE ASSIGN switch
Specifies how notes are produced.
MONO : Play monophonically
LEGATO : Play monophonically. The EG is not retriggered by the second or subsequent keystroke if you continue holding down the previous key.
DUO : Play duophonically (two voices).
POLY : Play polyphonically.

VCO-1 section

FM depth sliders
Adjusts the depth of FM (Frequency Modulation) when it is is applied.

PULSE WIDTH (WIDTH)
Adjusts the pulse width.

PULSE WIDTH (MOD)
Adjusts the depth of pulse width modulation.

FREQUENCY COARSE
Rough pitch adjustment.
This adjustment covers the range of 20 Hz–2 kHz if the keyboard switch is on, or 0.2 Hz–20 Hz if the keyboard switch is off.
The frequency range (20 Hz–2 kHz) is an approximate value.

FREQUENCY FINE
Fine pitch adjustment.

FM LFO switch
Selects the waveform of the modulation applied by the LFO.

FM SOURCE switch
Selects either Sample and Hold or the envelope generator (ADSR) as the modulation source.

PULSE WIDTH MOD switch
Selects the source that will apply pulse width modulation.

KYBD switch (AUDIO KYBD ON / LF KYBD OFF)
If this is set to AUDIO KYBD ON, VCO-1 is connected to the keyboard CV, and will produce pitches in the conventional way. If this is set to AUDIO KYBD OFF, VCO-1 is disconnected from the keyboard CV, and will oscillate as an LFO. You can use this signal to modulate VCO-2 or as an audio source for sound effects.

VCO-2 section

FM depth sliders
Adjusts the depth of FM (Frequency Modulation) when it is is applied.

PULSE WIDTH (WIDTH)
Adjusts the pulse width.

PULSE WIDTH (MOD)
Adjusts the depth of pulse width modulation.

FREQUENCY COARSE
Rough pitch adjustment. This is adjustable in the range of 20 Hz – 2kHz.
If the SYNC switch is on, this changes the overtone structure rather than the pitch.

FREQUENCY FINE
Fine pitch adjustment.
If the SYNC switch is on, this changes the overtone structure rather than the pitch.

FM LFO switch
Selects either modulation by an LFO sine wave or modulation by the S/H MIXER (sample and hold mixer).

FM SOURCE switch
Selects either Sample and Hold or the envelope generator (ADSR) as the modulation source.

PULSE WIDTH MOD switch
Selects the source that will apply pulse width modulation.

SYNC
Turns sync on/off.
If this is off, duophonic performance is possible. If this is on, VCO-2 is synchronized with the frequency (pitch) of VCO-1.

LFO、S/H MIXER、SAMPLE AND HOLD

S/H MIXER
S/H INPUT (VCO-1)
Adjusts the level at which the waveform output from VCO-1 is input to the S/H MIXER.

S/H INPUT (NOISE、VCO-2)
Adjusts the level at which noise or the square wave output from VCO-2 is input to the S/H MIXER.

S/H OUTPUT LAG
Smooths the changes of the S/H output voltage.
As you move the slider toward the “MAX” position, a greater amount of the smoothing will be applied.

S/H INPUT switch (VCO-1)
Selects the source (VCO-1 waveform) that is input to the S/H MIXER.

S/H INPUT switch (NOISE、VCO-2)
Selects the source (noise or VCO-2 square wave) that is input to the S/H MIXER.

S/H TRIGGER switch
Selects the signal (either the output of the LFO or the output of the keyboard) that is used as the trigger when detecting an audio signal sent from the S/H MIXER.

LFO
LFO FREQ
Adjusts the LFO speed.
Raising the slider makes the speed faster.

LFO KEY SYNC
If this is ON, the LFO starts each time you play a key, and an independent LFO operates for each note. If this is OFF, the LFO that was started by the first-played note is also applied to subsequentlyplayed notes.

LFO TEMPO SYNC
Turn this on/off to specify whether the LFO is synchronized to the tempo (MIDI clock).

AUDIO MIXER, VCF, HPF, VCA section

NOISE/RING MOD
Adjusts the level of the audio signal that is sent from the noise generator or the ring modulator.

VCO-1
Adjusts the level of the audio signal that is sent from VCO-1.

VCO-2
Adjusts the level of the audio signal that is sent from VCO-2.

FILTER MOD (KYBD CV、S/H MIXER)
Adjusts the level of the signal that controls the VCF FREQ, or adjusts how the signal sent from the S/H MIXER opens and closes the filter.

FILTER MOD (S/H、LFO)
Adjusts how the filter is opened and closed by S/H (sample and hold) or the LFO.

FILTER MOD (ADSR、AR)
Adjusts how the two envelope generators (AR and ADSR) control the filter.

VELOCITY (VEL VCA、VCF)
Adjust filter by velocity or the amp’s change in tone (VCA, VCF).

VCA LEVEL
Adjusts the level at which the envelope generators (AR and ADSR) control the VCA. In practical terms, this is the master volume of the ARP ODYSSEY.
If the DRIVE switch is on, this also adjusts the VCA distortion.

VCF FREQ
Adjusts how the LPF (Low Pass Filter) is applied.
If the slider is in the lowest position (16 Hz), the high-frequency range of the input signal is cut, producing a soft sound. Raising the slider makes the sound brighter.

VCF RESONANCE
Adjusts the resonance.
This modifies the tonal character by boosting the overtones in the region of the cutoff point. As you raise the slider, self-oscillation (a state in which the VCF itself produces a sound) will occur starting at a certain point.

HPF CUTOFF FREQ
Adjusts how the HPF (High Pass Filter) is applied.
As you raise the slider, the low-frequency region of the input signal is cut, producing a thinner sound. This is useful when you are simulating the sound of certain instruments.

DRIVE GAIN
Adjusts the amount of VCA distortion.

FILTER switch (NOISE、RING MOD)
Selects either noise or ring modulator.

FILTER switch (VCO-1)
Selects the VCO-1 waveform (sawtooth or square).
If you select square wave, you can raise the PULSE WIDTH slider to change from a square wave to a pulse wave.

FILTER switch (VCO-2)
Selects the VCO-2 waveform (sawtooth or square).
If you select square wave, you can raise the PULSE WIDTH slider to change from a square wave to a pulse wave.

FILTER MOD SOURCE switch (KYBD CV、S/H MIXER)
Selects the source that will control the filter.
If you select KYBD CV (keyboard control voltage), the signal normally used to convey key information from the keyboard to the VCO can be used to open and close the filter. For example, you can produce an effect in which the filter opens more for higher notes.
If you select S/H MIXER, the signal sent from the S/H MIXER will open and close the filter.

FILTER MOD SOURCE switch (S/H、LFO)
Selects the source that will control the filter.
You can produce a wah effect by using the LFO to modulate the filter.

FILTER MOD SOURCE switch (ADSR、AR)
Selects the envelope generator that will control the filter.

VEL switch (VCA、VCF)
Specifies whether velocity will affect the depth of change for the VCA or VCF.

VCA EG switch (AR、ADSR)
Selects the envelope generator that will control the VCA.

VCF TYPE switch
Selects the type of VCF.
I : ODYSSEY Rev.1
II : ODYSSEY Rev.2
III : ODYSSEY Rev.3

ENVELOPE GENERATOR section

ADSR EG - ATTACK
Adjusts the attack time of the ADSR envelope generator.

ADSR EG - DECAY
Adjusts the decay time of the ADSR envelope generator.

ADSR EG - SUSTAIN
Adjusts the sustain time of the ADSR envelope generator.

ADSR EG - RELEASE
Adjusts the release time of the ADSR envelope generator.

AR EG - ATTACK
Adjusts the attack time of the AR envelope generator.

AR EG - RELEASE
Adjusts the release time of the AR envelope generator.

ADSR trigger source switch
Selects the trigger that is sent to the ADSR envelope generator.
If KYBD GATE is selected, the trigger sent from the keyboard is sent to the EG. If LFO REPEAT is selected, the pulse wave of the LFO is sent to the EG, and the EG repeats the envelope cyclically at the rate of the LFO FREQ.

ADSR repeat switch
This is effective if LFO REPEAT is selected by the ADSR or by the AR trigger source switch.
If KYBD REPEAT is selected, the LFO trigger sent repeatedly to the EG continues repeating only as long as the key is pressed.
If AUTO REPEAT is selected, it continues repeating regardless of the keyboard on/off status.

AR trigger source switch
Selects the trigger that is sent to the AR envelope generator.
This has the same function as the ADSR trigger switch.

NOISE GENERATOR switch
Selects white noise or pink noise.