User guide

PitchFactor User Guide The Effects

H910/H949

This effect emulates the sound and functionality of Eventide’s legendary H910 and H949

Harmonizer™ effects units. The H910 Harmonizer was the world’s first real-time pro-audio

pitch changer and introduced the word “glitching” to the pro-audio vocabulary. The H949

was the world’s first de-glitched Harmonizer.

Unlike the Diatonic pitch shifters, pitch shifting is in the feedback loop allowing for

arpeggiated repeats.

Note: For the purists in our audience, you may remember that the H910 and H949 were

mono in, stereo out devices. In other words, they featured a single pitch shifter with

independently adjusted delays. To best emulate these vintage boxes, we recommend that you

set either PitchA or PitchB to unison (1.00) and use that output for feedback without pitch

change. Also note that PitchFactor offers ten times the maximum delay of the original gear.

Pitch Mix

Controls the ratio of the level of PitchA to PitchB.

Pitch A/Pitch B

Controls the amount of pitch shift for voices A and B expressed as a ratio.

Delay A/B

Controls the amount of time delay for voices A and B. With Tempo OFF, delay is displayed in

mSec. With Tempo ON, delay can be sync’d to the tempo and displayed as a rhythmic sub-

division of the tempo beat value.

Key/Depth

Selects the type of Harmonizer emulated [H910], [H949-1], [H949-2] and [MODERN]. The

H949 offered two splicing algorithms. Algorithm 1 created a ‘soft’ gradual splice. Algorithm

2 analyzed the audio and used an intelligent splicing algorithm that was successful in greatly

reducing glitching. PitchFactor allows you to select each of these algorithms and emulate

their classic sounds. Of course, given the many orders of magnitude increase in DSP power

since the days of the H910/H949, even greater intelligence can be brought to bear in de-

glitching. PitchFactor’s [MODERN] pitch shifting algorithm takes advantage of its powerful

DSP to further improve de-glitching. Each of these algorithms has a distinct quality and, when

combined with various amounts of delay and feedback, offer a broad pallet of pitch-shifting

effects.

Scale/Speed

Selects the type of pitch ratio control for PitchA and PitchB knobs. Normal allows continuous

control as a pitch ratio. Micro allows for fine adjustments around Unison. Chromatic allows

you to select intervals equal to the 12 note per octave scale.

Xnob/Ynob

Controls the amount of feedback for pitch shifter A/B.