Pure SUB gives its Harmonics layer two engines, Pressure and Reese, while the Sub layer generates the fundamental independently. Pressure produces low-density harmonic tones through a custom waveform editor. Reese creates wide, high-density unison from a wavetable-based source.
It is easy to treat those names as genre labels. That misses the useful distinction, since Pressure can move and widen while Reese can be restrained and centered.
The engine choice determines how much spectral density exists before filtering, distortion, or effects begin. That division is central to Arturia’s three-layer bass architecture because Harmonics can change character without carrying the fundamental alone. You can make an aggressive tone while keeping its actual low-frequency weight separately controlled.
The engine is additive under its editor, and that matters when you touch Detune. Detuning can act on individual partials rather than shifting a complete waveform as one unit. Small amounts introduce internal tension while leaving more space between harmonics than a stacked unison source normally would.
That makes Pressure useful for precise low-density harmonic movement. A restrained profile can give an 808 audible body above its fundamental, while a more uneven set of partials creates a harder digital edge. The sound remains editable at its source, before a filter or distortion stage hides what produced the change.
Pressure still shares Width, octave, coarse tuning, fine tuning, Morph, the Pitch Envelope, and EQ with Reese. It is not the narrow mode by definition. You can spread its harmonic content or animate Morph, but you begin with fewer components and decide how complicated the tone becomes.
That lower starting density also leaves more room for the Texture layer and later saturation. If those stages already provide grit, loading Harmonics with unison voices can crowd the middle of the sound before the mix adds anything else.
The dedicated Pitch Envelope operates separately from amplitude shaping. A short downward pitch movement can add impact without forcing the note to become shorter, while a longer curve can create the glide associated with modern 808 bass. Because the envelope acts inside the harmonic section, its effect remains distinct from the Sub layer’s level and phase controls.
A wide Reese patch can begin with a Unisaw waveform, then use Detune, Morph modulation, and moving phaser notches. EQ and compression follow to control the accumulated spectrum. The order matters because detuning establishes the movement, while later stages shape movement that already exists.
Width deserves restraint here. The separate Sub layer can remain stable while Reese spreads the harmonics, but wide unison content can still change level or tone when a mix is summed to mono. Checking the harmonic layer in mono reveals whether its character survives without confusing that test with loss of the independently generated fundamental.
Morph behaves differently from Pressure even though the control occupies the same role. Pressure moves through hand-shaped harmonic frames, while Reese moves through denser wavetable positions and stereo variations. The first changes a designed partial structure, while the second reshapes an already crowded source.
Start the comparison with the Sub level fixed and match the apparent loudness of the two Harmonic modes. Louder harmonic content nearly always appears more impressive, which can disguise a poor fit. Play the lowest note, the highest note, and any sustained note where movement becomes obvious before committing to the engine.
Key-tracked EQ handles the register problem directly. A harmonic profile that feels balanced on one note can become sharp higher up or dull lower down, even when the oscillator settings have not changed. Adjusting EQ with the keyboard range lets Pressure retain definition across a melodic 808 line or keeps Reese from becoming abrasive as its dense spectrum rises.
It is easy to treat those names as genre labels. That misses the useful distinction, since Pressure can move and widen while Reese can be restrained and centered.
The engine choice determines how much spectral density exists before filtering, distortion, or effects begin. That division is central to Arturia’s three-layer bass architecture because Harmonics can change character without carrying the fundamental alone. You can make an aggressive tone while keeping its actual low-frequency weight separately controlled.
Pressure builds weight without automatic width
Pressure is the deliberate option. Its editor provides eight waveform frames and 32 editable partial positions, with 16 partials available across the table, so you build a controlled harmonic profile instead of accepting a finished wavetable. Morph moves between those frames, which lets a simple bass change color without immediately becoming dense.The engine is additive under its editor, and that matters when you touch Detune. Detuning can act on individual partials rather than shifting a complete waveform as one unit. Small amounts introduce internal tension while leaving more space between harmonics than a stacked unison source normally would.
That makes Pressure useful for precise low-density harmonic movement. A restrained profile can give an 808 audible body above its fundamental, while a more uneven set of partials creates a harder digital edge. The sound remains editable at its source, before a filter or distortion stage hides what produced the change.
Pressure still shares Width, octave, coarse tuning, fine tuning, Morph, the Pitch Envelope, and EQ with Reese. It is not the narrow mode by definition. You can spread its harmonic content or animate Morph, but you begin with fewer components and decide how complicated the tone becomes.
That lower starting density also leaves more room for the Texture layer and later saturation. If those stages already provide grit, loading Harmonics with unison voices can crowd the middle of the sound before the mix adds anything else.
The dedicated Pitch Envelope operates separately from amplitude shaping. A short downward pitch movement can add impact without forcing the note to become shorter, while a longer curve can create the glide associated with modern 808 bass. Because the envelope acts inside the harmonic section, its effect remains distinct from the Sub layer’s level and phase controls.
Reese makes density and motion part of the tone
Reese starts from the opposite premise. Its high-density unison supplies beating and stereo movement before further processing, making it faster when the upper body of a bass should sound active from the first note. Factory wavetables provide immediate starting points, and the engine also accepts imported tables for more specific timbres.A wide Reese patch can begin with a Unisaw waveform, then use Detune, Morph modulation, and moving phaser notches. EQ and compression follow to control the accumulated spectrum. The order matters because detuning establishes the movement, while later stages shape movement that already exists.
Width deserves restraint here. The separate Sub layer can remain stable while Reese spreads the harmonics, but wide unison content can still change level or tone when a mix is summed to mono. Checking the harmonic layer in mono reveals whether its character survives without confusing that test with loss of the independently generated fundamental.
Morph behaves differently from Pressure even though the control occupies the same role. Pressure moves through hand-shaped harmonic frames, while Reese moves through denser wavetable positions and stereo variations. The first changes a designed partial structure, while the second reshapes an already crowded source.
Mode choice should follow the bass line
Pressure suits parts that need clear pitch, measured upper content, or controlled changes across several notes. Reese suits parts whose identity depends on beating, width, and continuous spectral motion. Neither choice dictates the genre, and a house bass can use restrained Reese settings just as a drum and bass patch can begin with Pressure.Start the comparison with the Sub level fixed and match the apparent loudness of the two Harmonic modes. Louder harmonic content nearly always appears more impressive, which can disguise a poor fit. Play the lowest note, the highest note, and any sustained note where movement becomes obvious before committing to the engine.
Key-tracked EQ handles the register problem directly. A harmonic profile that feels balanced on one note can become sharp higher up or dull lower down, even when the oscillator settings have not changed. Adjusting EQ with the keyboard range lets Pressure retain definition across a melodic 808 line or keeps Reese from becoming abrasive as its dense spectrum rises.
