Editing Oscillator sync (section)

==Soft Sync==
There are several other kinds of sync which may also be called Soft Sync. In a Hard Sync setup, the follower oscillator is forced to reset to some level and phase (for example, zero) with every cycle of the leader regardless of position or direction of the follower [[waveform]], which often generates [[asymmetry|asymmetrical]] shapes.

In some cases,<ref>synth-diy:[https://synth-diy.org/pipermail/synth-diy/2009-August/019132.html 2009, Aug, 019132]</ref><ref>synth-diy:[https://synth-diy.org/pipermail/synth-diy/2009-August/019136.html 2009, August, 019136]</ref> Soft Sync refers to a process intended to nudge and lock the follower oscillator into the same or an integer or fractional multiple of the leader oscillator frequency when they both have similar phases, similar to a [[Phase locked loop|phase-locked loop]].

===Reversing Sync===

This form of oscillator sync is less common. This form is very similar to Hard Sync, with one small difference. In Reversing Soft Sync, rather than resetting to zero, the wave is inverted; that is, its direction is reversed. Reversing Soft Sync is more associated with analog triangle core oscillators than analog sawtooth core oscillators.

===Threshold or Weak Sync===

Several kinds of Soft Sync use comparison thresholds:

* Hard Sync which is disabled when the frequency or amplitude of the follower crosses a user-defined threshold.
* Hard Sync which is disabled when the frequency of the follower extends too high above or too far below the frequency of the leader.
* Hard Sync which is disabled when the frequency of the follower is lower than the frequency of the leader.

Soft Sync may accurately refer to any of these, depending on the synthesizer or manufacturer in question.

===Phase Advance 'Sync'===

The phase of the follower is advanced by some amount when the leader oscillator level crosses some threshold. Used for audio synthesis, this may give an audible effect similar to Soft Sync.

===Reset Inhibit Sync===

When the leader oscillator crosses some threshold, the normal reset of the follower is disabled: it will stick at its final level, positive or negative. When the leader crosses back over some threshold, the follower is reset.

===Overlap Sync===

In this method, the current wave completes but a new waveform is generated at the sync pulse. The tail of the old wave and the new wave are output summed if they overlap.