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3rd Wave User Manual
Oscillators
About Wave Flow
The wave flow button toggles smoothed wavetable sweeping on and
off. When
wave flow is on, the waveshapes within a wavetable morph
smoothly into each other. When
wave flow is off, waveshapes within a
wavetable “step” from one to another in a more audible way. This effect
is more obvious on certain wavetables than others.
Wavetable Smoothing
Turning
wavetable smoothing on applies interpolation to smooth the transi-
tions between the individual waveforms in a selected wavetable when the
Wave Envelope or other modulation source sweeps through them. This
setting applies to both “P” waves and “U” waves. In both cases it is most
noticeable on low notes, where you will hear a growling quality to the note
as you jump between waveforms in the wavetable.
Waveform Smoothing
Turning
waveform smoothing on applies interpolation to the waveform and
pitch of individual notes for optimal pitch accuracy. In contrast, the original
PPG 2.2 and 2.3 did not use interpolation, and when you played different
notes on the keyboard, the PPG would use the closest sample in the small
128 sample waveform. As a result, unless you played a note that fell exactly
on a sample value, it would be slightly off pitch. So, with waveform smooth-
ing on, note pitch is exact. With it off, notes are slightly out of tune due to the
lack of interpolation, as they would be in the PPG. This is most noticeable
in high notes, where the lack of accuracy results in aliasing. It is also
noticeable in low notes, where the note will growl and have noticeable
artifacts when changing the pitch with pitch bend or LFO pitch modula-
tion.
Pressing the wave flow button also gives you access to the “Use Upper
Wavetable” feature, which was unique to the PPG. Enabling this function gives you
the ability to reach the last 4 waveforms in each of the P wavetables, and then to
move into wavetable P30, the “upper wavetable.” This was necessary on the original
PPG in cases when modulation caused wave sweeping to extend beyond the nal
waveshapes in a wavetable.
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