LAYER PAGES - Oscillator Ring Modulation
RING is short for Ring Modulation, which is similar in concept to FM (and the parameters are exactly the same as those in the FM sub-page). In Ring Modulation the frequencies of both oscillators are multiplied, which changes their overall amplitude, so it’s can also be referred to as Amplitude Modulation.
Traditionally, Ring Modulation is used as an effect to create high-frequency, clangorous overtones. However, Omnisphere’s Ring Modulator is polyphonic and can track the keyboard – meaning the pitch does not have to be fixed: it can follow the pitch of the keyboard. The result is something much more musical and useful than a traditional Ring Modulator.
Each Layer in Omnisphere has a dedicated Ring Modulation oscillator. This dedicated oscillator can utilize different waveforms and its frequency, depth, shape, symmetry and hard sync can be modulated.
You can select any of the over 400 waveforms or wavetables to act as the modulator. You can select them from the menu by clicking on the waveform display or by using the stepper arrows to the right of the image.
RING MOD POWER SWITCH
Turns the modulator oscillator On or Off.
RING MOD KEYBOARD TRACKING
The small music-keyboard switch enables or disables Keyboard Tracking. The Keyboard Tracking button determines whether the modulator oscillator tracks the keyboard. Most Ring Modulators do not track the keyboard, which is part of the character of their sound, but Omnisphere provides the option to enable Keyboard Tracking if required.
If the Keyboard Tracking is turned on, then the Ring Modulator oscillator will change pitch with the keyboard. If Keyboard Tracking is turned off, the modulation oscillator will remain the same pitch no matter what key is played.
RING MOD FREQUENCY
Controls the frequency of the modulation oscillator. When the FREQUENCY slider is set to minimum value, very slow modulation is heard. Sweeping thru the different values will cause different overtones become more pronounced, because the modulator is in the audio range.
The notches along the FREQUENCY slider are markers for the frequency ratios that will produce the most useful results.
The values at the notches are decimal versions of the following ratios:
1:.5, 1:1, 1:1.5, 1:2, represented as .250, .500. .750 and 1.00.
Range 0.000 to 1.000
RING MOD DEPTH
This horizontal slider controls the depth of the Ring Modulation, meaning how much interaction occurs between the Oscillator and the modulation oscillator.
Range 0.000 to 1.000
RING MOD DEPTH RANGE
This horizontal slider controls the depth of the Ring Modulation, meaning how much interaction occurs between the modulator and carrier.
Moving this slider sweeps through the wavetable selected as the Modulator, and depending on the wavetable, can create subtle or dramatic changes. The waveform display will dynamically change the waveshape as the RING SHAPE slider is moved.
RING SYMMETRY varies the span of the wavetable selected as the Modulator and is most commonly used for Pulse-Width modulation. This is especially useful when RING SYMMETRY is used as a modulation destination, as it adds shifting tone color and movement to the sound. The waveform display will dynamically change the waveshape as the RING SYMMETRY slider is moved.
RING HARD SYNC
Hard Sync was a feature on some analog synthesizers which gave the timbre a "throaty" diphthong type of sonic characteristic when swept. Hard Sync was popularized on synthesizers like the Prophet 5 and the early Oberheim synthesizers for a more metallic and aggressive timbre, and is especially useful for lead sounds. Hard Sync is achieved by using two oscillators, one which is the "master" and the other the "slave." The slave is forced to restart its waveform when hard-synced with the master oscillator and the master controls the pitch. Any changes in the slave oscillator’s pitch will not change the pitch of the master - they change the overtones and harmonic structure instead. The waveform display will dynamically change the waveshape as the RING HARD SYNC slider is moved.
In the past, an oscillator would need to be sacrificed to get the hard-sync effect, but Omnisphere has a hidden, dedicated oscillator just for hard-sync. The hard-sync oscillator becomes the slave and the Oscillator’s waveform is the master.