MONOCHORD — chord plugin & harmony workstation with vintage synth and instrument sounds (VST3/AU for macOS) by orph
chord-based arrangements in the character of classic production hardware.What normally takes piano training,
a chain of plugins and a slow setup
happens here in under a minute,
leaving only the music.
Click again for Factory mode.






- E-MU Proteus
- Korg Wavestation
- Kawai K1–K5
- Kurzweil K-Series
- PPG Wave
- Jupiter-8
- Oberheim OB-X
- Yamaha DX7
- Korg M1
- D-50
- Moog Minimoog
- Moog Memorymoog
- Yamaha CP-10
- Yamaha CP-70
- Yamaha TG500
- Yamaha TS12
- Suzuki Omnichord
- SQNTL Prophet VS
- MKS-70
- SQNTL Prophet-5
- Fairlight CMI
- Korg DW-8000
- Korg Mono/Poly
- Fender Rhodes
- NY Grand Piano
- Juno-106
- Juno-60
- Real Instruments
- Casio CZ-101
- Akai AX73
- Akai AX80
- Casio V10
- Korg Poly-61
- Yamaha S80
- Bontempi B3
- Voyetra-8
- Ensoniq Mirage
- E-MU Emax
- Casio VL-1
- Siel Opera 6 Kiwi
- Spatial Pan
- Reverbs
- Delays
- Flanger
- Phaser
- Glide
- Shimmer
- Tape Machines
- Sampler Engines
- Filter Effects
- Arpeggiator
- Atmosphere
- Inflater
- Brilliance
- Bass Mode
All effects are inspired by
- Juno-60 Chorus
- Boss CE-1
- Dimension D
- RE-201 Space Echo
- Boss DM-2
- EHX Memory Man
- MXR Phase 90
- Eventide H3000
- Lexicon 480L
- EMT 140 Plate
- Bricasti M7
- Akai S950
- Akai MPC60
- Akai MPC2000
- E-MU SP-1200
- Ensoniq Mirage
- WAV
- AIFF
- FLAC
- SFZ
- Decent Sampler
- SoundFont
- MID
- Auto key zones
- Root & loop detection
- From metadata
- Standalone · VST3 · AU
- macOS 10.13+ · Windows 10 / 11
- Universal · Apple Silicon + Intel
- 64-bit only
- 32-bit float internal
- 44.1–192 kHz
- 6 synthesis engines · FM · analog · wavetable · additive · granular · PCM
- ~11.6 GB sample library · one-time first-launch download (streamed)
- 425 sounds · 70+ multisampled instruments
- ~12 GB free disk space · SSD recommended
- 8 GB RAM minimum · 16 GB recommended
- Internet for activation + one-time sample download
- MIDI in / out · DAW automation
- Export: MIDI · audio (key · scale · tempo)
- Hosts: Logic Pro · GarageBand · MainStage · Ableton Live · Cubase / Nuendo · Studio One · Reaper · Bitwig · FL Studio
Watch an uninterrupted improvisation, performed entirely by mouse. The audio is an iPhone field recording. No further signal or plugin was added.
“Every session begins with stolen time: plugin chains to wire, music theory to learn, static sound presets scrolled in search of a certain character. I never trained as a pianist, and the chord voicings of my favorite film scores, club records, ambient and jazz albums often stayed out of reach. MONOCHORD ends that argument. The final design is a chord instrument, with an on-screen keyboard drawn large enough to play by mouse or a single key press. The effort falls away, leaving the sound and feel of vintage studio hardware and sampling culture. It is here to assist, never to replace creative intention and choice.”
— Damiano von Erckert