How do I change the Beat Frequency on the Subsequent 25?

Engage Shift mode by holding down the BANK 4 button and then pressing theACTIVATE PANEL button. When you do, all the BANK and PATCH buttons will go dark and the ACTIVATE PANEL button will blink. Pressing ACTIVATE PANELagain will cancel Shift mode and return all the controls to their normal functions.

KNOB: OSCILLATOR 2 FREQUENCY

Engage Shift mode and turn Oscillator 2’s FREQUENCY knob to set the “Beat Frequency” of Oscillator 2 against Oscillator 1.

The range is plus or minus 3.5 Hz, with no detuning (0Hz) in the middle. This parameter creates a linear constant detuning of Oscillator 2 relative to Oscillator 1, so that Oscillator 2 is always detuned by the same number of cycles per second (Hz) regardless of the musical pitch. The result is a musical detuning effect which phases or “beats” at a consistent rate on every note.

By contrast, the OSCILLATOR 2 FREQUENCY knob detunes Oscillator 2 by musical cents, where the rate of beating between Oscillators is halved or doubled as you play an octave lower or higher in pitch.

NOTE: For this reason, if you want a constant beat frequency at all pitches, make sure that the regular OSCILLATOR 2 FREQUENCY control is centered. If you want absolute unison between Oscillator 2 and Oscillator 1, make sure this BEAT FREQUENCY control is centered.