The sequel to Chord Agent
Type what you want to hear and pick a genre. Chord Agent 2 writes the progression, voices it, plays it in time with your track, and hands you the MIDI.
VST3 · AU · Standalone · macOS 11+ · Apple Silicon & Intel
Own Chord Agent v1? Upgrade free.
How it works
Describe the mood in plain words. Pick one of 36 genres (or Any), 2, 4 or 8 bars, and a key, or leave it on AUTO.
Hit GENERATE (or Enter). The harmony comes back with chord names, roman numerals, key, tempo and one line on why it works, plus a suggested voicing, rhythm and swing.
Turn the voicing and rhythm knobs or hit ROLL: it re-renders instantly on your Mac. Lock the chords you love, then tell it what to change.
It loops in sync with your song through the built-in synth or your own instruments. Drag the DRAG MIDI cartridge into a clip to get exactly the notes you hear.
Features
The server writes the progression. A C++ engine on your Mac voices it, grooves it and plays it.
A large language model writes progressions that fit your words and your genre: real extensions, modes, slash chords and anticipations. Every result shows the key, tempo, roman numerals and a one-line explanation, so you learn something every time.
Complexity strips chords back to triads or adds safe colour like 9ths and 11ths. Spread runs from one tight octave to three wide ones. Viterbi voice-leading keeps every voice moving as little as possible from chord to chord. ROLL tries another voicing of the same style.
Density, Swing and Humanize shape the groove; ROLL picks another pattern. It all renders locally and instantly, with no server round trip.
Lock any chord, type “darker bar 3, more tension before the loop” and hit REFINE. Want a different take on the same idea? NEW HARMONY. HISTORY steps back and forward through the last 50 results, saved with your project.
KEY shows the progression’s key. The arrows transpose it a semitone at a time, or pick a tonic under TRANSPOSE TO. That happens on your Mac, instantly: locks stay and playback carries on. Choose another mode under MODE (REFINE), say F minor to F dorian, and the server re-voices it in that mode, keeping the harmonic rhythm and bass motion.
Pick a voice for the built-in synth with the SOUND arrows, the list, or the PATCH knob. LEVEL sets its volume.
Press play in your DAW and the progression loops from bar 1, locked to your tempo. With the transport stopped, PLAY previews it. The built-in synth means you hear chords the second you load it.
Switch the synth off and drive any instrument from Chord Agent 2’s MIDI output. When it’s right, drag the MIDI straight into a clip or the arrangement: the exact voicings, rhythm and feel you heard.
Genres
36 genres, from Deep House and Jungle to Neo Soul, Amapiano and Cinematic. These are real results for short prompts: the progression, the tempo, and the voicing and rhythm it suggested.
Prompt
late night deep house, soulful rhodes, bittersweet but hopeful
Genre · Voicing · Rhythm
MIDNIGHT REFLECTIONS · Ab DORIAN · 122 BPM
Lush Abm9 moves to a bright Db13 dorian lift, sinking into poignant Fbmaj9 before Gb9sus4 glides smoothly back home.
4 bars, key on AUTO. Cell width follows each chord’s length.
Guide
From an empty MIDI track to a voiced, grooving progression in your arrangement.
$29 once. Everything included.
Own Chord Agent v1? Your upgrade is free. Install Chord Agent 2, enter your v1 email and serial in its licence card, and get your new key. How the free upgrade works
FAQ
A Mac with macOS 11 (Big Sur) or later, Apple Silicon or Intel. Chord Agent 2 comes as VST3, Audio Unit and a Standalone app. There’s no Windows version.
Yes for GENERATE, REFINE, NEW HARMONY and mode changes: the harmony is written on our server. Everything after that runs on your Mac and works offline: knobs, voicing and rhythm styles, ROLL, transpose, sounds, playback, MIDI out and drag MIDI.
Any macOS host that loads VST3 or AU instruments, such as Ableton Live, Logic Pro, Bitwig Studio, Cubase, Studio One, Reaper and FL Studio. Drag MIDI works everywhere; routing its live MIDI output to another track depends on your host.
Put Chord Agent 2 on a MIDI track. Create another MIDI track with your instrument, set MIDI From to the Chord Agent 2 track (choose Chord Agent 2 in the second dropdown), arm it or set Monitor to In, then switch SYNTH off in Chord Agent 2.
No. Install Chord Agent 2, open LICENSE, choose “I have a v1 serial instead” and enter the email and serial you already have: you get a Chord Agent 2 key back. How the upgrade works. Lost your serial? Email support@sonic-weapons.com.
Checkout is handled by Stripe. As soon as payment goes through you land on a page showing your key (CA2-XXXXX-XXXXX-XXXXX-XXXXX). Paste it into Chord Agent 2’s licence card. Lost it? Email support from your purchase address and we’ll resend it.
Two at a time per licence. Moving to a new computer? Deactivate the old one in the LICENSE panel, or from the list that appears when you activate a third. You can move it 3 times in 30 days; after that, email support.
Email support@sonic-weapons.com within 14 days of purchase for a full refund.
Yes. The MIDI you make is yours.
No. Chord Agent 2 does chords: written, voiced and played in rhythm. You hear them through the built-in synth or send the MIDI to your own instruments. It doesn’t generate audio, melodies, basslines or drums.
Chord Agent 2 for macOS. $29 once, or free with your v1 serial.