Version 1.0.0 • Morphulus
Spectrus is available for Windows, macOS, and Linux in multiple plugin formats.
1. Extract the downloaded ZIP file.
2. Copy the plugins to their standard locations:
Spectrus.vst3 → C:\Program Files\Common Files\VST3\
Spectrus.clap → C:\Program Files\Common Files\CLAP\
3. Open your DAW and rescan plugins if necessary.
4. Insert Spectrus on a track or bus.
1. Open Spectrus-1.0.0-macOS.pkg and follow the installer.
2. The following plugins will be installed:
AU → /Library/Audio/Plug-Ins/Components/
VST3 → /Library/Audio/Plug-Ins/VST3/
CLAP → /Library/Audio/Plug-Ins/CLAP/
3. Open your DAW and rescan plugins if needed. Logic will validate on next launch; in Reaper, go to Options → Preferences → VST → Re-scan; in Ableton, go to Preferences → Plug-Ins → Rescan.
4. Insert Spectrus on a track or bus.
1. Extract the downloaded tar.gz file.
2. Open a terminal in the extracted folder and run:
chmod +x install.sh && ./install.sh
3. The following plugins will be installed:
VST3 → ~/.vst3/
LV2 → ~/.lv2/
CLAP → ~/.clap/
4. Open your DAW and rescan plugins if needed. In Reaper, go to Options → Preferences → VST → Re-scan; in Bitwig, go to Settings → Locations → Rescan; Ardour will scan on next launch.
5. Insert Spectrus on a track or bus.
| Requirement | Minimum |
|---|---|
| Operating System | Windows 10+, macOS 11+ (Intel & Apple Silicon), Ubuntu 22.04+ / Linux x86_64 |
| Processor | Intel Core i5 or equivalent |
| RAM | 4 GB |
| Plugin Formats | VST3 · AU (macOS) · LV2 (Linux) · CLAP (all platforms) |
Spectrus has a clean, modular layout organized around its 4-slot architecture.
From top to bottom, the interface consists of:
Preset Navigator (top left) — Shows the current preset name. Click to browse presets, or use the arrow buttons to step through them. The dice button loads a random preset. An asterisk (*) appears when you've made changes to the current preset.
Spectrus Logo (top right) — Right-click to access the About dialog, website link, license activation, license management, and support link. If you have a Pro license, the menu shows your licensed email address.
Signal Flow Diagram — A visual representation of the signal chain showing all 4 slots plus the output. Active slots light up and display level meters. Click a slot in the diagram to expand it.
Demo / Free Toggle — If you haven't activated a Pro license, an amber DEMO or green FREE button appears in the routing row. Click it to switch between Demo mode and Free mode. See Demo & Free Mode for details. This button is hidden once a Pro license is activated.
Routing Selectors — Below the signal flow diagram, each slot has a dropdown to choose its input source: Main Input, or the output of any previous slot.
Slot Panels — Four equal-width panels, one per slot. In the default collapsed view, each panel shows its header from left to right: the ⊕ button to add an effect, mute/solo buttons, expand button, slot lock button, bypass/power button, and a compact parameter view. Click the expand button (or click the slot in the signal flow diagram) to expand a slot to full width for detailed editing.
Master Panel — Always visible on the right. Contains the master dry/wet levels, Low Cut/High Cut, High End/Low End, and Input Attack controls.
Status Bar (bottom) — Displays tooltips and descriptions when hovering over controls. The version number appears in the bottom right.
Each slot panel header contains:
| Control | Function |
|---|---|
| Effect Selector | Click the ⊕ to open a categorized menu of available effects (Modulation, Delay, Reverb, Utility). |
| Power Button | Bypasses the slot. When powered off, the slot is silenced and does not contribute to the output. Powering back on restores the previous effect. |
| Expand Button | Expands the slot to full width for detailed parameter editing. Other slots are hidden while expanded. |
| Mute (M) | Silences the slot's output. |
| Solo (S) | Solos the slot — only this slot's output is heard. Multiple slots can be soloed. |
| Lock | Locks the slot's settings so they are preserved when loading presets. Useful for auditioning presets while keeping an effect you like in one slot. |
By default, all four slots receive the main input independently (parallel), and their outputs are mixed together at the output stage. Use the slot input routing to chain slots in series or create hybrid configurations.
Each slot (except Slot 1, which always receives the main input) can choose its input source via the routing dropdown. Options include the main input or the output of any previous slot. This lets you create flexible effect chains — for example, you could route Slots 2 and 3 both from the main input to create two parallel effect paths.
Each slot has an independent output level control. When a slot is expanded, you'll also find low cut and high cut output filters that shape the slot's signal before it enters the mix.
Mixing happens at two levels in Spectrus:
Per-effect: Most effects have Wet Level and Dry Level controls that determine the blend of processed and original signal within that effect.
Master: The Master panel's Dry Level and Wet Level control the final balance between the unprocessed input and the combined processed output of all slots.
| Control | Description |
|---|---|
| Dry Level | Level of the original unprocessed signal in the final output. |
| Wet Level | Level of the combined processed signal from all slots. |
| Input Attack | Shapes the transient response of the input signal feeding into the effects. |
| High End | Adds subtle high-frequency excitation and harmonic richness to the wet signal. |
| Low End | Adds low-end body and warmth to the wet signal. |
| Low Cut | High-pass filter applied to the combined wet signal before the final mix. Removes low-end rumble and mud. Range: 10 Hz – 1500 Hz. |
| High Cut | Low-pass filter applied to the combined wet signal before the final mix. Tames harshness and rolls off high-frequency content. Range: 100 Hz – 20 kHz. |
You can drag slot panels to reorder them. Dragging one slot onto another swaps their contents (effect selection and all parameter values).
Right-click a slot panel to copy its configuration. Then right-click another slot and paste to duplicate the effect and settings.
Spectrus ships with 21 effects across four categories: Modulation, Delay, Reverb, and Utility. The 7 Free effects are available to all users. The 14 Pro effects (marked below) require a Pro license.
A versatile chorus effect that doubles and detunes the signal using a modulated delay line. Produces anything from subtle thickening to lush, wide textures.
| Parameter | Range | Description |
|---|---|---|
| Rate | 0.05 – 5 Hz | Speed of the LFO modulation. Slower rates produce a gentle swaying motion; faster rates create a vibrato-like effect. |
| Depth | 0 – 100% | How far the delay time is modulated. Higher values produce a more pronounced pitch variation. |
| Mod Type | Sine, Triangle, Square, Sawtooth, Random, MultiWave | Shape of the modulation waveform. Sine is smooth and classic; Random adds unpredictability. |
| Feedback | 0 – 95% | Feeds the output back into the delay for a richer, more resonant chorus tone. |
| BBD Filter | On/Off | Enables vintage Bucket Brigade Device filtering (150 Hz high-pass input, 8 kHz low-pass output) for a retro character. |
| Sync | On/Off | Locks the modulation rate to your DAW's tempo. |
| Sync Division | 8/1 – 1/16D | Note value for the modulation rate when Sync is enabled. |
| Wet Level | 0 – 100% | Level of the chorused signal. |
| Dry Level | 0 – 100% | Level of the original signal blended with the chorus. |
Emulates the classic Roland CE-1 Chorus Ensemble with authentic BBD-style analog tone. Features both Chorus and Vibrato modes with smooth, organic modulation and a warm preamp stage.
| Parameter | Range | Description |
|---|---|---|
| Rate | 0.05 – 5 Hz | Modulation speed. Slower rates produce lush, gentle movement. |
| Depth | 0 – 100% | Width of the delay time modulation sweep. |
| Mode | Chorus, Vibrato | Chorus blends wet and dry signals for thickening. Vibrato modulates pitch only with no dry signal — pure pitch wobble. |
| Preamp | 0 – 100% | Subtle input saturation that adds warmth, emulating the original CE-1 preamp stage. |
| Intensity | 0 – 100% | Controls how much of the modulation range is applied. Adjusts the actual pitch swing magnitude. |
| Sync / Division | — | Locks the modulation rate to your DAW's tempo at the selected note value. |
| Wet / Dry Level | 0 – 100% | Blend of chorused and original signal. |
A classic flanging effect created by mixing the signal with a short, modulated delay. Produces sweeping comb-filter effects from subtle jet-plane swooshes to metallic resonances.
| Parameter | Range | Description |
|---|---|---|
| Rate | 0.01 – 10 Hz | Speed of the LFO sweep. |
| Depth | 0 – 100% | Width of the delay time modulation. |
| Feedback | −95% – +95% | Amount of output fed back into the delay. Negative values invert the phase, producing a different tonal character with deeper notches. |
| Delay Time | 0.1 – 10 ms | Base delay time. Shorter values produce a tighter, more metallic sound; longer values approach chorus territory. |
| Manual | 0 – 100% | Static offset added to the delay time, shifting the frequency of the comb filter notches. |
| Stereo Width | 0 – 100% | LFO phase offset between left and right channels for stereo spread. |
| Mod Type | Sine, Triangle, Square, Sawtooth, Random | LFO waveform shape. |
| Sync / Division | — | Locks the LFO rate to your DAW's tempo at the selected note value. |
| Wet / Dry Level | 0 – 100% | Blend of flanged and original signal. |
A phase-shifting effect using a chain of all-pass filters. Creates sweeping notches in the frequency spectrum for that classic swirling sound.
| Parameter | Range | Description |
|---|---|---|
| Rate | 0.01 – 10 Hz | Speed of the phase sweep. |
| Depth | 0 – 100% | Width of the frequency sweep range. |
| Feedback | 0 – 95% | Resonance at the notch frequencies. Higher values produce a sharper, more pronounced effect. |
| Stages | 1 – 12 | Number of all-pass filter stages. More stages create more notches in the spectrum. 4 stages is classic; 8–12 produces a denser, richer phasing. |
| Center Freq | 100 – 5000 Hz | Center frequency of the sweep range. Shift this to focus the phasing on different parts of the spectrum. |
| Stereo Width | 0 – 100% | LFO phase offset between channels. |
| Mod Type | Sine, Triangle, Square, Sawtooth, Random | LFO waveform shape. |
| Sync / Division | — | Tempo-synced modulation rate. |
| Wet / Dry Level | 0 – 100% | Blend of phased and original signal. |
Rhythmic volume modulation that creates pulsing, stuttering, or gently breathing dynamics. A fundamental effect that works beautifully on guitars, pads, and keyboards.
| Parameter | Range | Description |
|---|---|---|
| Rate | 0.1 – 20 Hz | Speed of the volume modulation. |
| Depth | 0 – 100% | How much the volume varies. 100% goes from full volume to silence. |
| Mod Type | Sine, Triangle, Square, Sawtooth, Random, MultiWave | Shape of the volume envelope. Square produces a hard chop; Sine is smooth and classic. |
| Stereo Mode | Mono, Stereo, Ping-Pong | Mono modulates both channels together. Stereo offsets the LFO between L/R. Ping-Pong alternates between channels. |
| Shape | −100% – +100% | Warps the modulation waveform. Negative values sharpen the peaks; positive values flatten them. |
| Sync / Division | — | Locks the tremolo rate to your DAW's tempo. |
| Wet / Dry Level | 0 – 100% | Blend of modulated and original signal. |
Multiplies the input signal with a carrier oscillator to produce metallic, bell-like, and robotic tones. Generates sum and difference frequencies for anything from subtle shimmer to extreme inharmonic textures.
| Parameter | Range | Description |
|---|---|---|
| Frequency | 20 – 2000 Hz | Carrier oscillator frequency. Low values produce bell-like resonance; mid-range creates robotic textures; high values are metallic and harsh. |
| Depth | 0 – 100% | Ring modulation intensity. |
| Fine Tune | −100 – +100 cents | Precise carrier pitch adjustment for fine-tuning the modulation frequency. |
| Wave Type | Pure, Soft, Harsh, Rasp | Carrier waveform. Pure (sine) is clean; Soft (triangle) is smooth; Harsh (square) is aggressive; Rasp (sawtooth) is gritty. |
| LFO Rate | 0 – 10 Hz | Modulation rate for the carrier frequency. Set to 0 for a static carrier tone. |
| LFO Depth | 0 – 100% | Amount of LFO modulation applied to the carrier frequency. |
| LFO Wave | Sine, Triangle, Random | LFO waveform. Random produces sample-and-hold-style frequency jumps. |
| Stereo Spread | 0 – 100% | Detunes the left and right carrier oscillators for stereo width. |
| Low Cut | 20 – 500 Hz | Removes sub-bass rumble from difference frequencies. |
| Sync / Division | — | Locks the LFO rate to your DAW's tempo. |
| Wet / Dry Level | 0 – 100% | Blend of modulated and original signal. |
Simulates the iconic Leslie rotating speaker cabinet with dual rotors spinning at different speeds. Captures authentic Doppler pitch modulation, amplitude modulation, and cabinet resonance in both Chorale (slow) and Tremolo (fast) modes.
| Parameter | Range | Description |
|---|---|---|
| Speed Mode | Stopped, Slow, Fast | Rotor state. Stopped halts rotation. Slow is Chorale mode (~0.8 Hz horn). Fast is Tremolo mode (~6 Hz horn). |
| Acceleration | 0 – 100% | Rotor spin-up/spin-down time. Higher values produce a more realistic momentum effect when switching speeds. |
| Crossover Frequency | 200 – 2000 Hz | Frequency split between the bass drum and treble horn rotors. 800 Hz is the classic Leslie 122 setting. |
| Horn Depth | 0 – 100% | Treble rotor modulation intensity. Controls the shimmer and swirl of the high frequencies. |
| Bass Depth | 0 – 100% | Bass rotor modulation intensity. Adds warmth and low-end movement. |
| Stereo Width | 0 – 100% | Phase offset between left and right rotors. 100% gives the classic Leslie stereo spread. |
| Mic Distance | 0 – 100% | Simulates microphone distance, affecting Doppler pitch wobble intensity. |
| Cabinet Resonance | 0 – 100% | Multi-band cabinet coloration that adds woody warmth and Leslie character. |
| Wet / Dry Level | 0 – 100% | Blend of rotary and original signal. |
Generates stepped random control signals at a variable rate, modulating filter frequency, panning, amplitude, and distortion to create glitchy, stuttering, or stochastic textures. Features glide options for smoothing hard steps into musical transitions.
| Parameter | Range | Description |
|---|---|---|
| Rate | 0.1 – 20 Hz | Sample-and-hold trigger rate. Higher values produce faster, more frantic modulation. |
| Jitter | 0 – 100% | Random variation applied to each trigger time. Creates organic, less metronomic timing. |
| Probability | 0 – 100% | Likelihood of triggering a new sample each cycle. Lower values produce sparser modulation. |
| Filter Depth | 0 – 100% | Amount of S&H modulation applied to filter frequency. |
| Pan Depth | 0 – 100% | Amount of S&H modulation applied to left/right panning. |
| Amplitude Depth | 0 – 100% | Amount of S&H modulation applied to signal level, creating gating and ducking effects. |
| Distortion Depth | 0 – 100% | Amount of S&H modulation applied to a drive parameter. |
| Glide Mode | Off, Glide, Portamento | Off produces instant steps. Glide smooths transitions as a percentage of the cycle. Portamento uses a fixed time in milliseconds. |
| Glide Amount | 0 – 100 | Transition time: percentage of cycle (Glide) or milliseconds (Portamento). |
| Sync / Division | — | Locks the S&H rate to your DAW's tempo. |
| Wet / Dry Level | 0 – 100% | Blend of modulated and original signal. |
A full-featured stereo delay with filtering, cross-feedback, and ping-pong mode. From clean digital repeats to warm, filtered echoes.
| Parameter | Range | Description |
|---|---|---|
| Time | 1 ms – 2 s | Delay time. At 120 BPM, a quarter note is 500 ms. |
| Feedback | 0 – 99% | Amount of the delayed signal fed back for additional repeats. Higher values produce longer echo trails. |
| Cross Feedback | 0 – 99% | Feeds the left channel's delay into the right and vice versa, creating complex stereo patterns. |
| Stereo Width | 0 – 100% | Pan spread of the echo. 0% is mono; 100% is full stereo. |
| Time Offset | −50% – +50% | Offsets the right channel's delay time relative to the left. Creates polyrhythmic echo patterns. |
| Low Cut | 20 – 1000 Hz | High-pass filter on the echo repeats. Cleans up muddy low-end buildup. |
| High Cut | 100 Hz – 20 kHz | Low-pass filter on the echo repeats. Lower values produce a warm, analog-style darkening of each repeat. |
| Ping Pong | On/Off | Bounces the echoes between left and right channels. |
| Sync / Division | — | Locks the delay time to your DAW's tempo at the selected note value. |
| Wet / Dry Level | 0 – 100% | Blend of delayed and original signal. |
A vintage-inspired tape echo emulating classic units like the Roland Space Echo and Maestro Echoplex. Features wow and flutter modulation, tape saturation, multi-head playback, and progressive high-frequency degradation for authentic analog character.
| Parameter | Range | Description |
|---|---|---|
| Delay Time | 10 ms – 1.5 s | Primary playback head delay time. |
| Feedback | 0 – 105% | Amount fed back for repeats. Values above 100% allow runaway oscillation for creative effects. |
| Wow Depth / Rate | 0 – 100% / 0.1 – 2 Hz | Slow pitch drift modulation characteristic of worn tape transport mechanisms. |
| Flutter Depth / Rate | 0 – 100% / 3 – 12 Hz | Fast, subtle pitch variation from tape-head irregularities. |
| Saturation | 0 – 100% | Tape warmth and harmonic coloration on the delay signal. |
| Age | 0 – 100% | Macro control affecting saturation and overall degradation. Higher values sound more worn and vintage. |
| Degradation | 0 – 100% | High-frequency loss applied to each repeat cycle, simulating tape wear. Creates natural darkening over successive echoes. |
| High Cut | 1 kHz – 15 kHz | Low-pass filter on the delay path. |
| Low Cut | 20 – 500 Hz | High-pass filter on the delay path. Removes rumble from repeats. |
| Head Bump | 0 – 100% | Low-mid emphasis around 100 Hz, emulating the mechanical resonance of a tape playback head. |
| Stereo Width | 0 – 200% | Stereo spread of the echoes. 0% is mono; 100% is natural; 200% is exaggerated wide. |
| Head Mode | Single, Dual, Triple | Number of playback heads. Dual and Triple create polyrhythmic echo patterns. |
| Head 2/3 Offset | 0.25x – 2x | Time multiplier for additional playback heads relative to the primary delay time. |
| Head 2/3 Level | 0 – 100% | Output level of each additional playback head. |
| Sync / Division | — | Locks the delay time to your DAW's tempo. |
| Wet / Dry Level | 0 – 100% | Blend of delayed and original signal. |
A filterbank-based delay that splits the signal into multiple frequency bands, each with its own independent delay time. Creates complex temporal-spectral effects where different parts of the frequency spectrum echo at different rates.
| Parameter | Range | Description |
|---|---|---|
| Band Count | 4 / 8 / 12 / 16 | Number of parallel frequency bands. More bands provide finer spectral control at higher CPU cost. |
| Base Delay | 1 ms – 2 s | Base delay time for the primary frequency band. |
| Delay Spread | −100% – +100% | How delay time varies across the spectrum. Positive values delay higher frequencies more (spacious shimmer). Negative values delay lower frequencies more. |
| Spread Curve | Linear, Logarithmic, Exponential | Shape of the delay time distribution across bands. |
| Feedback | 0 – 150% | Global feedback. Values above 100% allow self-oscillation for infinite sustain effects. |
| Stereo Spread | −100% – +100% | Independent delay offset between left and right channels for stereo width. |
| Low Cut | 20 Hz – 1 kHz | High-pass filter in the feedback path. Prevents muddy low-end buildup. |
| High Cut | 1 kHz – 20 kHz | Low-pass filter in the feedback path. Darkens repeats for natural decay. |
| Mod Rate | 0.01 – 10 Hz | LFO rate for modulating the delay spread pattern. |
| Mod Depth | 0 – 100% | Amount of LFO modulation on the spread. Creates evolving, shifting spectral textures. |
| Sync / Division | — | Locks the base delay time to your DAW's tempo. |
| Wet / Dry Level | 0 – 100% | Blend of spectrally delayed and original signal. |
Inspired by the classic EMT 140 plate reverb, this effect simulates the sound of audio vibrating through a large metal plate. Known for its smooth, dense reverb tail that works especially well on vocals, snare drums, and guitars.
| Parameter | Range | Description |
|---|---|---|
| Size | 0 – 100% | Simulated plate dimensions. Larger values produce a bigger, more spacious reverb. |
| Decay | 0 – 100% | Length of the reverb tail. |
| Pre-Delay | 0 – 150 ms | Time before the reverb onset. Adds separation between the dry signal and the reverb, improving clarity. |
| Diffusion | 0 – 100% | Density of the reverb texture. Higher values produce a smoother, more blended tail. Lower values let individual reflections through. |
| Brightness | 0 – 100% | Tonal character of the plate. Lower values produce the classic warm, dark EMT 140 sound. Higher values open up the highs for a brighter plate. |
| Character | Classic, Modern, Hybrid | Diffusion algorithm style. Classic is dense and immediate; Modern is open and spacious; Hybrid blends both qualities. |
| Mod Rate | 0.1 – 5 Hz | Internal modulation rate that adds subtle movement to the reverb tail. |
| Mod Depth | 0 – 100% | Amount of internal modulation. Adds life and prevents the reverb from sounding static. |
| High Damping | 0 – 100% | How quickly high frequencies decay within the reverb. Higher values produce a warmer, darker tail. |
| Low Damping | 0 – 100% | How quickly low frequencies decay. Higher values thin out the low end of the reverb. |
| High Cut | 100 Hz – 20 kHz | Output filter that rolls off high frequencies from the reverb signal. |
| Wet / Dry Level | 0 – 100% | Blend of reverb and original signal. |
A hybrid algorithmic reverb with character-based delay patterns (Prime, Fibonacci, Golden Ratio, and more). Features attack envelope control for transient shaping and sophisticated modulation for movement and depth.
| Parameter | Range | Description |
|---|---|---|
| Room Size | 0 – 100% | Overall reverb space size and density. |
| Decay Time | 0 – 100% | Reverb tail length. |
| Attack | 0 – 100% | Transient envelope control. Shapes how quickly the reverb responds to input. |
| High Damping | 0 – 100% | How quickly high frequencies decay within the reverb. |
| Low Damping | 0 – 100% | How quickly low frequencies decay within the reverb. |
| Early Diffusion | 0 – 100% | Diffusion applied to early reflections. Higher values produce a smoother onset. |
| Late Diffusion | 0 – 100% | Diffusion in the decay tail. Higher values produce a denser, more blended tail. |
| Character | Tight, Wide, Fibonacci, Golden, Coprime, Mixed | Delay pattern algorithm that defines the mathematical character of the reverb's coloration. |
| Mod Rate | 0.01 – 10 Hz | Internal modulation speed. |
| Mod Depth | 0 – 100% | Amount of internal modulation for movement in the tail. |
| Mod Type | None, Classic, Chorus, Random, Shimmer, Complex, Harmonic | Modulation waveform applied to the reverb tail. |
| High Cut | 100 Hz – 20 kHz | Output filter that rolls off high frequencies from the reverb signal. |
| Wet / Dry Level | 0 – 100% | Blend of reverb and original signal. |
A chamber-style reverb combining feedback loops with reverb delay networks. Creates smooth, dense reflections with a lush, enveloping character suited to vocals, strings, and pads.
| Parameter | Range | Description |
|---|---|---|
| Room Size | 0 – 100% | Chamber space size, affecting early/late reflection balance. |
| Decay Time | 0 – 100% | Length of the reverb tail. |
| Pre-Delay | 0 – 200 ms | Time before the reverb onset. Adds separation for clarity. |
| Diffusion | 0 – 100% | AllPass diffusion intensity for smoothness and density. |
| Diffusion Stages | 0 – 8 | Number of allpass stages. More stages produce a silkier, more blended character. |
| High Damping | 0 – 100% | High-frequency damping for a warm, natural decay. |
| Low Damping | 0 – 100% | Low-frequency damping to control bass buildup. |
| Mod Rate | 0.1 – 2 Hz | Delay line modulation rate for organic movement. |
| Mod Depth | 0 – 100% | Amount of modulation in the reverb tail. |
| High Cut | 100 Hz – 20 kHz | Output low-pass filter for taming brightness. |
| Low Cut | 20 Hz – 5 kHz | Output high-pass filter. |
| Wet / Dry Level | 0 – 100% | Blend of reverb and original signal. |
A dense 16-delay feedback network reverb with integrated per-delay harmonic processing. Creates rich, warm textures with five harmonic coloration modes for diverse sonic character.
| Parameter | Range | Description |
|---|---|---|
| Room Size | 0 – 100% | Delay network scaling factor affecting perceived space size. |
| Decay Time | 0 – 100% | Reverb tail length (extended range up to 150 seconds internally for vast spaces). |
| Pre-Delay | 0 – 100% | Input diffuser delay scaling. |
| High Damping | 0 – 100% | High-frequency damping intensity. |
| Low Damping | 0 – 100% | Low-frequency damping intensity. |
| Early Diffusion | 0 – 100% | Diffusion on the input signal for density. |
| Late Diffusion | 0 – 100% | Internal network diffusion. |
| Character | Small, Medium, Large, Shimmer, Dark, Vintage | Physical space character that defines delay and filter characteristics. |
| Mod Rate | 0.01 – 2 Hz | Network modulation speed. |
| Mod Depth | 0 – 50% | Network modulation amount. |
| Mod Type | None, Sine, Triangle, Random, Complex | Modulation waveform shape. |
| Harmonic Enable | On/Off | Master toggle for per-delay harmonic processing. |
| Harmonic Character | Off, Warm, Vintage, Bright, Dark, Lo-Fi | Harmonic coloration mode applied inside each of the 16 delay lines. |
| Harmonic Amount | 0 – 100% | Intensity of harmonic processing. |
| Harmonic Mix | 0 – 100% | Parallel mix between clean and harmonically processed delay signals. |
| High Cut | 100 Hz – 20 kHz | Output filter for vintage warmth. |
| Wet / Dry Level | 0 – 100% | Blend of reverb and original signal. |
An ethereal pitch-shifted reverb that adds octave-shifted (or other interval) feedback to the reverb tail. Creates lush, evolving textures that bloom upward in pitch. Optional dual-voice mode enables rich harmonic complexity.
| Parameter | Range | Description |
|---|---|---|
| Room Size | 0 – 100% | Core reverb space size. |
| Decay Time | 0 – 100% | Reverb tail length. |
| Shimmer Amount | 0 – 100% | Blend between the normal reverb and the shimmer (pitch-shifted) feedback path. |
| Shimmer Pitch | −24 – +24 semitones | Primary pitch shift interval. Default is +12 (one octave up). |
| Shimmer Tone | 20 – 2000 Hz | High-pass filter on the shimmer path. Higher values produce an airier, more crystalline shimmer. |
| Shimmer Feedback | 0 – 100% | Additional feedback for the shimmer path, controlling how much the pitch-shifted signal recirculates. |
| Dual Voice | On/Off | Enables a second pitch-shifted voice for richer harmonic shimmer. |
| Second Pitch | −24 – +24 semitones | Pitch interval of the second voice. Default is +7 (perfect fifth). |
| Grain Size | 10 – 130 ms | Granular pitch shifter grain size. Larger values produce smoother, less grainy shimmer. |
| Diffusion | 0 – 100% | Early and late diffusion for smoothness. |
| High Damping | 0 – 100% | High-frequency damping (kept low by default for airy shimmer). |
| Character | Tight, Wide, Fibonacci, Golden, Coprime, Mixed | Core reverb delay pattern algorithm. |
| Mod Rate / Depth | 0.01 – 2 Hz / 0 – 25% | Internal modulation for movement in the reverb tail. |
| High Cut | 100 Hz – 20 kHz | Output filter. |
| Wet / Dry Level | 0 – 100% | Blend of reverb and original signal. |
An infinite sustain reverb that captures and endlessly sustains the current reverb texture. Perfect for ambient sound design, with smooth fade transitions, optional input bleed for layering, and continuous modulation for evolving frozen textures.
| Parameter | Range | Description |
|---|---|---|
| Freeze | On/Off | Toggle freeze mode. When enabled, the current reverb texture is captured and sustained indefinitely. |
| Freeze Fade Time | 10 – 2000 ms | Transition time for smooth freeze/unfreeze. Longer values create gradual, cinematic transitions. |
| Freeze Input Bleed | 0 – 100% | Amount of new input allowed during freeze. 0% is a pure freeze; higher values let you layer new material over the frozen texture. |
| Freeze Decay | 0 – 100% | Slow decay during freeze. 0% is truly infinite; higher values allow the frozen texture to gradually fade away. |
| Room Size | 0 – 100% | Core reverb space size. |
| Decay Time | 0 – 100% | Pre-freeze reverb tail length. |
| Diffusion | 0 – 100% | Early and late diffusion for density. |
| High / Low Damping | 0 – 100% | Frequency-dependent damping. |
| Character | Tight, Wide, Fibonacci, Golden, Coprime, Mixed | Reverb delay pattern algorithm. |
| Mod Rate / Depth | 0.01 – 2 Hz / 0 – 25% | Modulation continues during freeze for evolving, non-static textures. |
| High Cut | 100 Hz – 20 kHz | Output filter. |
| Wet / Dry Level | 0 – 100% | Blend of reverb and original signal. |
A freeze reverb based on a plate-style architecture with three unique diffusion character presets (Crystal, Glacier, Arctic). Combines the smooth density of a plate reverb with freeze capability for capturing and sustaining textures.
| Parameter | Range | Description |
|---|---|---|
| Size | 0 – 100% | Plate/room size affecting the reverb's spaciousness. |
| Decay Time | 0 – 100% | Reverb tail length. |
| Pre-Delay | 0 – 150 ms | Time before the reverb onset. |
| Diffusion | 0 – 100% | Input diffusion for density and smoothness. |
| Brightness | 0 – 100% | Tonal character. Lower values produce a darker, warmer sound. |
| Character | Crystal, Glacier, Arctic | Diffuser preset. Crystal is tight and dense; Glacier is expansive; Arctic is vast and wide. |
| Freeze | On/Off | Toggle infinite sustain mode. |
| Freeze Fade Time | 10 – 2000 ms | Smooth transition time into/out of freeze. |
| Freeze Input Bleed | 0 – 100% | New input allowed during freeze. 0% is a pure capture. |
| Freeze Decay | 0 – 100% | Slow decay during freeze. 0% is truly infinite. |
| Mod Rate | 0.1 – 5 Hz | Internal modulation speed. |
| Mod Depth | 0 – 100% | Internal modulation amount. |
| High Damping | 0 – 100% | High-frequency damping. |
| Low Damping | 0 – 100% | Low-frequency damping. |
| High Cut | 100 Hz – 20 kHz | Output filter. |
| Wet / Dry Level | 0 – 100% | Blend of reverb and original signal. |
A hybrid reverb using sparse early reflections combined with a Dense Velvet Noise (DVN) late tail. Produces natural, smooth decay without metallic artifacts. Ideal for drums, percussion, and transient-rich material that needs organic room ambience.
| Parameter | Range | Description |
|---|---|---|
| Room Size | 0 – 100% | Affects early reflection spacing and late tail density. |
| Decay Time | 0 – 100% | Reverb decay length (optimized for short drum-style reverbs). |
| Pre-Delay | 0 – 150 ms | Time before early reflections. |
| Density | 0 – 100% | DVN impulse density. Sparse produces a grainy texture; dense is smooth and full. |
| Density Shape | 0 – 100% | Impulse distribution. 0% is linear; 100% is front-loaded for punchier drums. |
| Damping | 0 – 100% | High-frequency damping. 0% is bright; 100% is dark. |
| Early/Late Mix | 0 – 100% | Balance between early reflections and the DVN late tail. |
| Smooth | 0 – 100% | Allpass diffusion applied to the late tail. 0% is pure DVN; 100% adds maximum smearing. |
| Quality | 100 – 2500 | Impulse count ceiling. Higher values produce denser, more realistic tails at the cost of CPU. |
| Low Cut | 20 – 500 Hz | Output high-pass filter. |
| High Cut | 1 kHz – 20 kHz | Output low-pass filter. |
| Mod Rate / Depth | 0.1 – 2 Hz / 0 – 100% | Early reflection modulation for subtle movement. |
| Freeze | On/Off | Infinite sustain mode for capturing reverb textures. |
| Wet / Dry Level | 0 – 100% | Blend of reverb and original signal. |
A sophisticated hybrid reverb combining Dense Velvet Noise (DVN) for natural early character with a Feedback Delay Network (FDN) for extended tail length. Ideal for halls, cathedrals, and large spaces.
| Parameter | Range | Description |
|---|---|---|
| Room Size | 0 – 100% | Affects early reflection spacing and FDN delay times. |
| Decay Time | 0 – 100% | Decay range. |
| Pre-Delay | 0 – 150 ms | Time before reverb processing begins. |
| Density | 0 – 100% | DVN impulse density in the early section. |
| Damping | 0 – 100% | High-frequency damping. 0% is bright; 100% is dark. |
| DVN/FDN Mix | 0 – 100% | Balance between DVN character (natural warmth) and FDN tail extension (length and sustain). |
| Character | Small, Natural, Large, Hall, Cathedral, Infinite | FDN character preset affecting delay times and space coloration. |
| Mod Rate | 0.1 – 2 Hz | FDN delay line modulation rate. |
| Mod Depth | 0 – 100% | FDN modulation depth. |
| Mod Type | None, Sine, Triangle, Square, Sawtooth, Random | FDN modulation waveform. |
| Low Cut | 20 – 500 Hz | Output high-pass filter. |
| High Cut | 1 kHz – 20 kHz | Output low-pass filter. |
| Wet / Dry Level | 0 – 100% | Blend of reverb and original signal. |
A versatile saturation/distortion module with multiple algorithms. Adds warmth, edge, or aggressive distortion depending on the mode and amount.
| Parameter | Range | Description |
|---|---|---|
| Amount | 0 – 100% | Drive intensity. Low values add subtle warmth; high values produce obvious distortion. |
| Shape | 0 – 100% | Adjusts the saturation curve. Affects how the distortion responds to different signal levels. |
| Mode | Soft Clip, Cubic, ArcTangent, Asymmetric, Chebyshev | Saturation algorithm. Soft Clip is gentle and musical. Cubic adds odd harmonics. ArcTangent is smooth. Asymmetric creates even harmonics for a tube-like character. Chebyshev produces rich harmonic overtones. |
| Output Gain | 0.1x – 2x | Compensates for level changes caused by saturation. Useful for A/B comparison at matched volumes. |
| Wet / Dry Level | 0 – 100% | Blend of saturated and original signal. |
Click the preset name in the Preset Navigator (top left) to open the preset browser. Factory presets are organized by effect category. Use the left/right arrow buttons to step through presets sequentially, or click the dice button to load a random preset.
After tweaking your sound, click the save icon in the Preset Navigator to save a user preset. You can name it and choose a folder for organization. User presets appear in a separate section of the preset browser.
The Init option resets all slots to Bypass and all parameters to their default values. Use this as a clean starting point.
The shuffle button randomly loads presets across all 4 slots. This is a great way to discover unexpected combinations and spark creative ideas.
When you lock a slot (using the lock icon in the slot header), that slot's effect and settings are preserved when you load presets, use Random Mix, Next/Prev buttons, or Init. This is powerful for auditioning — for example, lock a reverb you like in Slot 3 and browse through different modulation presets in the other slots.
Documents\Spectrus\Presets. Back up this folder to preserve your presets.
Before activating a Pro license, Spectrus offers two ways to use the plugin. You can switch between them at any time by clicking the DEMO / FREE toggle button in the routing row.
Demo mode is active by default when you first install Spectrus. It gives you full access to all 21 effects so you can explore everything Spectrus has to offer.
The trade-off: a periodic audio fade reminds you that you're running in demo mode. At a random interval (roughly every 45–75 seconds), the output smoothly fades down over 4 seconds, holds silence for 1 second, and then fades back up over 4 seconds. The fade applies to the entire output — both dry and wet signals.
If you prefer uninterrupted audio, switch to Free mode. In Free mode, only the 7 free effects produce audio: Chorus, Flanger, Phaser, Tremolo, Echo, Plate Reverb, and Saturator. There is no audio fade or time restriction.
Pro effects are still visible in the Module Picker but are marked with a yellow PRO badge. If a Pro effect is loaded in a slot, it is silently replaced with Bypass so it doesn't affect your signal.
Once you activate a Pro license key, the Demo/Free toggle disappears entirely. All 21 effects work without any restrictions, fades, or badges. See License & Support for activation instructions.
| Feature | Demo Mode | Free Mode | Pro |
|---|---|---|---|
| Available effects | All 21 | 7 free effects | All 21 |
| Audio fade | Yes (periodic) | No | No |
| PRO badges shown | No | Yes | No |
| Random Mix draws from | All effects | Free effects only | All effects |
| Production-ready | No (fade interruptions) | Yes (7 effects) | Yes (all effects) |
All Spectrus parameters are automatable from your DAW. Parameters follow the naming convention s{slot}{Effect}{Parameter} — for example, s1ChorusRate is Slot 1's Chorus Rate, and s3PlateDecayTime is Slot 3's Plate Reverb Decay.
Slot-level controls like level, mute, and solo are also automatable using names like slot1Level, slot1Mute, and slot1Solo.
To automate a parameter, use your DAW's standard automation workflow (e.g., right-click a control in some DAWs, or find the parameter in your DAW's automation lane browser).
Spectrus automatically creates a log file that records plugin lifecycle events, module loading, and errors. If you encounter a problem, this file helps us diagnose it.
Log locations:
Windows: %APPDATA%\Spectrus\logs\Spectrus.log
macOS: ~/Library/Spectrus/logs/
Linux: ~/.config/Spectrus/logs/
The log auto-rotates at 256 KB and supports multiple simultaneous instances (each tagged with an instance number). Please attach this file when submitting bug reports.
Verify the plugin files are in the correct locations for your platform (see Installation above). Then rescan your plugin directories from your DAW's preferences.
Try increasing your audio buffer size. Some effects (especially reverbs with long decay times) are more CPU-intensive. Disable slots you are not using by setting them to Bypass.
Spectrus includes a safety limiter that mutes the output if dangerously loud levels are detected. This can happen with extreme feedback settings. Reduce the feedback on the offending effect and the mute will release automatically.
Please report bugs using our online form at bugs.morphulus.com. Include:
1. A description of the problem and steps to reproduce it.
2. Your DAW name and version.
3. Your OS version and audio interface/buffer size (on Linux, also note your audio setup: ALSA, PipeWire, or JACK).
4. The diagnostic log file (see Diagnostic Log above for the path on your platform).
Spectrus Free includes 7 effects: Chorus, Flanger, Phaser, Tremolo, Echo, Plate Reverb, and Saturator. The full 4-slot architecture, routing system, and preset system are fully functional.
Spectrus Pro unlocks 14 additional effects including Vintage Chorus, Ring Modulator, Rotary, Sample & Hold, Tape Delay, Spectral Delay, and 8 additional reverb algorithms (Prism, Bloom, Ember, Shimmer, Freeze, Velvet Room, Velvet Hall, and Glacier).
After purchasing Spectrus Pro, you'll receive a license key via email. To activate:
1. Right-click the Spectrus logo in the top-right corner of the plugin.
2. Select "Enter License Key..." from the menu.
3. Either paste the key directly into the text field, or click "Load File" to browse for a .lic file.
4. Click "Activate".
Verification is instant — no internet connection required. On success, the plugin immediately unlocks all Pro effects and the Demo/Free toggle disappears.
Once activated, right-click the Spectrus logo to see "Licensed to: [your email]" displayed in the menu. Select "Manage License..." to view your license details or clear the license from this machine.
Your license key is saved locally at Documents\Spectrus\license.key and persists across DAW restarts and system reboots. You can use the same key on multiple machines.
Website: morphulus.com
Email: morphulusfx@gmail.com