Endorphin.es Ghost
Stereo multi-effects processor with reorderable delay, reverb, filter, and distortion chain plus sidechain ducking
16 HP Eurorack module
The Endorphin.es Ghost is a fully digital stereo multi-effects processor in 16HP, designed in collaboration with Andrew Huang. It combines a reorderable effects chain of delay, reverb, multimode filter, and distortion with dynamics processing (compressor and sidechain ducking), pre/post VCAs, and extensive CV control. Running on an ARM Cortex-M7 at 96 kHz / 24-bit with 32-bit floating-point internal processing, it features three switchable routing orders for its main effects blocks, three filter types (LP/HP isolator, band-pass, comb with resonator), tap-syncable delay with 1V/oct tracking for Karplus-Strong synthesis, lush hall reverb with shimmer and freeze plus reverse reverb, 8x oversampled distortion, bitcrusher and sample rate reducer (FW V3.0), and sidechain audio ducking with external trigger input. The ROUTING button acts as a shift key to access secondary functions on most knobs, giving the module far more parameters than its panel suggests.
Features
- Fully digital stereo processing at 24-bit 96 kHz with 32-bit float internals on ARM Cortex-M7
- Three reorderable effect blocks (FX, Distortion, Filter) switchable with single button press
- 8x oversampled distortion algorithm
- Zero-delay feedback state-variable filter with three modes (LP/HP isolator, BPF, Comb with resonator)
- Stereo delay up to 2.5 seconds with tap tempo, external clock sync, and 1V/oct tracking
- Three delay stereo tap configurations (LRLR, LRRL, true Stereo)
- Lush hall reverb with progressive shimmer, freeze, and mid/side widener
- Reverse reverb with pre-delay control
- Delay looper mode via reverse reverb + freeze combination
- One-knob peak stereo compressor with CV control
- Sidechain ducking with external trigger input and adjustable depth/decay
- Envelope output (positive 0-5V, 1ms attack, exponential decay)
Controls & Jacks (38)
- TONE — Controls input tone/EQ. Hold Shift: adjusts input gain.
- Envelope Out — Envelope follower output from compressor sidechain.
- VOLUME — Master output volume. Hold Shift: adjusts drive amount.
- Audio In 1 — Main audio input (left/mono).
- Audio Out 1 — Main audio output 1.
- LP Out — Low-pass filter output tap.
- Pre VCA — Pre-effects VCA CV input.
- COMPRESSOR — Compressor amount / HP-LP crossover balance.
- Post VCA — Post-effects VCA CV input.
- Audio Out 2 — Audio output 2 (right).
- Dist CV In — CV input for distortion amount.
- DISTORTION — Distortion/clipping amount.
- Compressor CV — CV input for compressor threshold.
- SIDECHAIN — Sidechain depth. Hold Shift: envelope depth.
- Trigger In — Trigger input for sidechain ducking.
- VCF CV In — CV input for filter cutoff.
- Clip — Indicates distortion clipping.
- Routing LED — Shows current signal routing mode.
- Reso CV In — CV input for filter resonance.
- FREQUENCY — Filter cutoff frequency. Large central knob.
- CUTOFF CV — Attenuator for VCF CV input.
- RESONANCE — Filter resonance. Self-oscillates at high settings.
- Delay Dry/Wet CV — CV input for delay dry/wet mix.
- DELAY — Delay dry/wet mix.
- REVERB — Reverb dry/wet mix.
- Reverb Dry/Wet CV — CV input for reverb dry/wet mix.
- Time CV — CV input for delay time.
- REPEATS — Delay feedback/repeats. Hold Shift: tone control. Repeats CV jack nearby.
- Repeats CV — CV input for delay repeats.
- TIME/DIV — Delay time as musical divisions (1/4, 3/4, 5/4, 7/4, x2). 1V/Oct tracking.
- Tail CV — CV input for reverb tail length.
- TAIL — Reverb tail/decay length. Hold Shift: pre-delay time.
- ROUTING — Cycles routing: fx>dist>vcf, dist>vcf>fx, vcf>fx>dist. Hold Shift: selects tap count.
- TAP/Clock In — Tap tempo / external clock input for delay sync.
- Freeze In — Gate input for freeze (holds delay/reverb buffer).
- Delay Out — Direct delay effect output.
- FREEZE — Freezes delay/reverb buffer. Hold Shift: reverse. Third: BPF/comb mode.
- BPF/Comb — Toggles bandpass filter / comb filter mode.
How-To Guides
- Karplus-Strong Synthesis
- Techno Rumble Bass
- Ghost Drone Texture
- Sidechain Pumping Effect
- Lo-Fi Radio Degradation
Explore the interactive Ghost panel on BleepDex — tap any control to learn what it does.
