Eurorack Reference / modules /synthesis-technology/e520 audit site v0.1 — milestone 3
synthesis-technology/e520

E520 Hyperion

Synthesis Technology

Stereo audio effects processor operating at 24-bit 48kSPS with algorithms including delays, frequency shifts, phasing, flanging, filters, reverberation, looping, sampling and frequency domain manipulation. Features CV control of real-time parameters and a graphic user interface for Eurorack and outboard use.424

Capabilities 5

Formant Filterformant-filter
Realized via the Voder algorithm (15 vowel formant shapes) and the Spectral Vocoder algorithm.424
Frequency Shifterfrequency-shifter
Realized via Deflector Shield (mono Bode-style) and Frequency Shifter (true stereo) algorithms, both with +/-5kHz carrier range and three operating modes.424
Multi-Effects Processormulti-effects
424
Spectral Resynthesisspectral-resynthesis
Uses 1024-point complex FFT (512 bins at 48Hz each, 2.7ms processing rate) for Spectral Crusher, Spectral Drone, Spectral Vocoder, Spectral Delay, Spectral Sweep and Spectral Time Machine algorithms.424
Stereo Processingstereo-processing
Left and Right audio inputs and outputs with independent processing; most algorithms are true stereo.424

Jacks 6 — 3 in / 3 out

NameSignalVoltageDescription
Inputs (3)
Left Audio Inaudio—424
Right Audio Inaudio—424
Tap/Synctrigger—424
Outputs (3)
Aux Outmixed—424
Left Audio Outaudio—424
Right Audio Outaudio—424

Parameters 51

NameTypeRangeBehavior
Bandsmenu_setting8 – 512424
Carrier (Deflector Shield)menu_setting-5000Hz – 5000Hz424
Carrier (Frequency Shifter)menu_setting-5kHz – 5kHz424
Chop Divmenu_setting—Controls chunk size by scaling from whole notes to 1/64th notes relative to the Tap Tempo quarter note.424
Chop Ordmenu_setting—Controls time span for fetching alternate chunks (0%→Buf Mult limit). Beyond 50% CW adds 0–100% probability of chunk reversal.424
Delay Lmenu_setting0s – 1.96s424
Delay Rmenu_setting0s – 1.96s424
Delay Time (Resampling Mini Delay)menu_setting—Controls sampling rate over a 1:8 (48kHz–6kHz) range, smoothly varying delay without granular artifacts but introducing considerable FM.424
Diffusemenu_setting—Two-mode control varying mix and length of the 8-stage allpass diffuser. Button selects whether CV controls mix (0–99%) or length (up to >1 second).424
Dly Lenmenu_setting0% – 99%424
Durationmenu_setting0s – 100s424
Filter Cutoff Frequencymenu_setting0kHz – 24kHz424
Filter Resonancemenu_setting0% – 99%424
Gain (Envelope-Wah)menu_setting0 – 5.5424
Gain (Spectral Vocoder)menu_setting0 – 100424
Grain Sizemenu_setting0% – 99%424
InMix (Resampling Mini Delay)menu_setting—Mixes L/R inputs. Full CCW = 100% Left, full CW = 100% Right, 12:00 = 50/50 mix.424
LFO Depthmenu_setting0% – 99%424
LFO Freqmenu_setting—Controls frequency of the integrated LFO on an exponential curve for greater low-frequency sensitivity. Range shown as 100sec–1sec / 1–11Hz depending on display format.424
LFO Phasemenu_setting0deg – 360deg424
Lag (Envelope-Wah)menu_setting0% – 99%424
Left Feedbackknob—Provides inverting feedback when turned CCW from center, positive feedback when turned CW from center. Some algorithms repurpose these controls.424
Left Pitch (Spectral Drone)menu_setting-1200cent – 1200cent424
Left Wet/Dryknob—424
Length (Spectral Drone)menu_setting0.01s – 10s424
Phasemenu_setting0% – 99%424
Pitch (Spectral Crusher)menu_setting-2400cent – 2400cent424
Pitch (Spectral Time Machine)menu_setting-2400cent – 2400cent424
Pitch (Voder)menu_setting-300Hz – 300Hz424
Pitch Lmenu_setting-2400cent – 2400cent424
Pitch Rmenu_setting-2400cent – 2400cent424
PreDlymenu_setting0ms – 85ms424
Ptch Prbmenu_setting—Controls the probability that a pitch shift will be applied to any chunk.424
Rate (Spectral Sweep)menu_setting-1200cent/s – 1200cent/s424
Resamplemenu_setting—Controls sampling rate from 48kHz (1x) down to 6kHz (8x).424
Resample (Looper)menu_setting1 – 8424
Right Feedbackknob—424
Right Wet/Dryknob—424
Rolloffmenu_setting0.8kHz – 15kHz424
Rvb Timemenu_setting0.1s – 10s424
Shift (Granular Pitch)menu_setting-2400cent – 2400cent424
Sibilancemenu_setting0% – 99%424
Start Freqmenu_setting10Hz – 10000Hz424
Sttr Prbmenu_setting—Stutter Probability. Full CCW = no chopping; full CW = every chunk is chopped.424
Tap Offset (Resampling Mini Delay)menu_setting0% – 200%Controls position of the variable delay tap. Range is 0–200% of the fixed tap position. Varying in real-time causes granular cross-fading effects.424
Tapsmenu_setting1 – 16424
Tiltmenu_setting-0.99 – 0.99424
VCO Adjmenu_setting0% – 99%424
Vowelmenu_setting—Selects one of 15 vowel sounds to shape spectrum. Can morph smoothly or be quantized to exact settings.424
VwlLagmenu_setting—Variable lag filter that smoothly interpolates in time between selected vowels.424
Width (Voder)menu_setting-50% – 50%424

Firmware history 12 versions

VersionReleasedNotes
1.32023-07-30V1.3 general release. Includes introduction and interfaces documentation, Looper bypass disable, inverting feedback notes, Prime Delay BPM readout, and various V1.3 feature updates from pre-release versions.424
1.22021-09-11Final release of V1.2. Added Resampling Reverb, Convolution, Multitap Delay algorithms. Added more resampling quantization options, multi-chorus feedback swap, wet-only W/D mix option, LFO sync, more phase blur control, filter type settings, trigger outputs, more patches per algorithm, live tap tempo ratios.424
1.12020-11-15Added Hi-Res Spectral Drone, Resonators, Headspace and Dirt algorithms. Added Wet/Dry mix prefs, sync div rate prefs, buffer load for Looper and Spectral Time Machine, Time Machine factor quantization, flanger 20Hz–20kHz freq mode, tap ratios in several delay algos, Vref/die temp readouts. Fixed freeze click in mini delay, limiter threshold, spectral delay sync BPM.424
0.92020-04-24Added Pattern Delay algorithm.424
0.82020-04-21Added Dual Mono and Voder algorithms. Renamed some algorithms.424
0.72020-01-10Added Spectral Drone algorithm; added frequency shift BPM display, Shimmer RT and filter unit displays.424
0.62019-12-31Added Stereo Chowder Delay algorithm.424
0.52019-12-06Updated for new Time Machine UI.424
0.42019-12-02Added auxiliary outputs on frequency shift and flanger algorithms. Updated Looper UI.424
0.32019-11-22Added Flanger, Chorus, Tap LFO setting, Auto-Wah algorithms.424
0.22019-11-04Added Main Page P2, P3, Clean Delay Tap offset, Scope mode.424
0.12019-10-10Initial release.424

References 2

  1. [424]
    E520 Hyperion Effects Referencemanual
    source 424 canonical ↗ archived ↗
    ● verified 2026-05-16
  2. [425]
    Synthesis Technology E520 Hyperion product pageproduct_page
    source 425 canonical ↗ archived ↗
    ● verified 2026-05-16