User guide

Front Panel Elements (numbers refer to the diagram on the rst page)

MANUAL DATA INPUT - this is a rotary encoder which is used to enter data in various operaon modes.

Pushing on the encoder acvates a switch which enters and exits the PRESET mode. The red LED above

the encoder indicates whether or not the PRESET mode is acve. When the LED is lit the PRESET mode is

acve.

WAVE BANK/SAVE BUTTON - this buon, when pressed, switches the rotary encoder to entry of the

acve wave bank for oscillator 1 or 2. Successive presses of the buons toggles between oscillator 1 and

oscillator 2. When bank select is acve, the top line of the LCD display will show a descripve tle for

the currently selected bank. The waves corresponding to each wave bank are depcited in Appendix A.

When the module is in PRESET mode (indicated by the illuminaon of the red LED above the rotary en-

coder) this buon has a dierent funcon - that of saving the current front panel control state into the

currently selected preset.

SYNC/PULSE/STEP BUTTON - this buon, when pressed, switches the rotary encoder to selecon of the

SYNC mode. A second press of the buon switches the rotary encoder to selecon of the PULSE output

source.

When the module is in PRESET mode (indicated by the illuminaon of the red LED above the rotary en-

coder) this buon has a dierent funcon - that of entering the PRESET STEP mode.

MODA/MORPH BUTTON - this buon, when pressed, switches the rotary encoder to selecon of the

MODA desnaon.

When the module is in PRESET mode (indicated by the illuminaon of the red LED above the rotary en-

coder) this buon has a dierent funcon - that of entering the MORPH mode.

CHORD TYPE/MULTI/LOAD BUTTON - this buon, when pressed, switches the rotary encoder to selec-

on of the MULTI seng for oscillator 1. A second press of the buon switches the rotary encoder to

selecon of the MULTI seng for oscillator 1. If CHORD mode is acve (as indicated by the illuminaon

of the LED above the CHORD mode buon) then a third buon press will switch the rotary encoder to

selecon of the CHORD type.

When the module is in PRESET mode (indicated by the illuminaon of the red LED above the rotary

encoder) this buon has a dierent funcon - that of loading the control sengs from the currently

selected PRESET.

INT. FM POTENTIOMETER - this potenometer provides an oset that is summed with the external IFM

input signal to produce the signal that sets the modulaon of oscillator 1’s frequency by the output of

oscillator 2. The internal FM is computed at the system clock rate of 25 MHz, providing very high-quality

aliasing free modulaons.

INT. SYNC BUTTON - this buon toggles the internal sync on and o. When on, as indicated by the il-

luminaon of the LED above the buon, both oscillators 1 and 2 are synchronized at the start of each

cycle of an internal synchronizaon oscillator running at the same frequency as oscillator 1 (except that

the synchronizaon oscillator is not aected by the FM inputs to oscillator 1). The specic response of

the oscillators to the synchronizaon pulses depends on the SYNC mode seng.